ipv6 flow monitor
Flexible NetFlow Commands
• cache, page 4
• clear flow exporter, page 6
• clear flow monitor, page 7
• collect, page 9
• collect counter, page 11
• collect interface, page 13
• collect timestamp absolute, page 15
• collect transport tcp flags, page 17
• collect wireless ap mac address (wireless), page 19
• collect wireless client mac address (wireless), page 20
• datalink flow monitor, page 21
• datalink flow monitor (wireless), page 23
• debug flow exporter, page 24
• debug flow monitor, page 25
• debug flow record, page 26
• debug sampler, page 27
• description, page 28
• destination, page 29
• dscp, page 31
• export-protocol netflow-v9, page 32
• exporter, page 33
• flow exporter, page 34
• flow monitor, page 35
• flow record, page 36
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Flexible NetFlow Commands
• ip flow monitor, page 37
• ipv6 flow monitor, page 39
• ip flow monitor (wireless), page 41
• ipv6 flow monitor (wireless), page 42
• match application name (wireless), page 43
• match datalink dot1q priority, page 44
• match datalink dot1q vlan, page 45
• match datalink ethertype, page 46
• match datalink mac, page 48
• match datalink vlan, page 50
• match flow direction, page 51
• match interface, page 52
• match ipv4, page 53
• match ipv4 destination address, page 55
• match ipv4 source address, page 56
• match ipv4 ttl, page 57
• match ipv6, page 58
• match ipv6 destination address, page 60
• match ipv6 hop-limit, page 61
• match ipv6 source address, page 62
• match transport, page 63
• match transport icmp ipv4, page 65
• match transport icmp ipv6, page 66
• match wireless ssid (wireless), page 67
• mode random 1 out-of, page 68
• option, page 69
• record, page 71
• sampler, page 72
• show flow exporter, page 74
• show flow interface, page 77
• show flow monitor, page 79
• show flow record, page 84
• show flow record wireless avc basic (wireless), page 85
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• show sampler, page 86
• source, page 88
• template data timeout, page 90
• transport, page 91
• ttl, page 92
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Flexible NetFlow Commands
cache
cache
To configure a flow cache parameter for a flow monitor, use the cache command in flow monitor configuration
mode. To remove a flow cache parameter for a flow monitor, use the no form of this command.
cache {timeout {active| inactive} seconds| type normal}
no cache {timeout {active| inactive} | type}
Syntax Description
Command Default
timeout
Specifies the flow timeout.
active
Specifies the active flow timeout.
inactive
Specifies the inactive flow timeout.
seconds
The timeout value in seconds. The range is 1 to 604800 (7 days).
type
Specifies the type of the flow cache.
normal
Configures a normal cache type. The entries in the flow cache will
be aged out according to the timeout active seconds and timeout
inactive seconds settings. This is the default cache type.
The default flow monitor flow cache parameters are used.
The following flow cache parameters for a flow monitor are enabled:
• Cache type: normal
• Active flow timeout: 1800 seconds
• Inactive flow timeout: 15 seconds
Command Modes
Command History
Usage Guidelines
Flow monitor configuration
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Each flow monitor has a cache that it uses to store all the flows it monitors. Each cache has various configurable
elements, such as the time that a flow is allowed to remain in it. When a flow times out, it is removed from
the cache and sent to any exporters that are configured for the corresponding flow monitor.
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cache
The cache timeout active command controls the aging behavior of the normal type of cache. If a flow has
been active for a long time, it is usually desirable to age it out (starting a new flow for any subsequent packets
in the flow). This age out process allows the monitoring application that is receiving the exports to remain up
to date. By default, this timeout is 1800 seconds (30 minutes), but it can be adjusted according to system
requirements. A larger value ensures that long-lived flows are accounted for in a single flow record; a smaller
value results in a shorter delay between starting a new long-lived flow and exporting some data for it. When
you change the active flow timeout, the new timeout value takes effect immediately.
The cache timeout inactive command also controls the aging behavior of the normal type of cache. If a flow
has not seen any activity for a specified amount of time, that flow will be aged out. By default, this timeout
is 15 seconds, but this value can be adjusted depending on the type of traffic expected. If a large number of
short-lived flows is consuming many cache entries, reducing the inactive timeout can reduce this overhead.
If a large number of flows frequently get aged out before they have finished collecting their data, increasing
this timeout can result in better flow correlation. When you change the inactive flow timeout, the new timeout
value takes effect immediately.
The cache type normal command specifies the normal cache type. This is the default cache type. The entries
in the cache will be aged out according to the timeout active seconds and timeout inactive seconds settings.
When a cache entry is aged out, it is removed from the cache and exported via any exporters configured for
the monitor associated with the cache.
To return a cache to its default settings, use the default cache flow monitor configuration command.
Note
Examples
When a cache becomes full, new flows will not be monitored.
The following example shows how to configure the active timeout for the flow monitor cache:
Switch(config)# flow monitor FLOW-MONITOR-1
Switch(config-flow-monitor)# cache timeout active 4800
The following example shows how to configure the inactive timer for the flow monitor cache:
Switch(config)# flow monitor FLOW-MONITOR-1
Switch(config-flow-monitor)# cache timeout inactive 30
The following example shows how to configure a normal cache:
Switch(config)# flow monitor FLOW-MONITOR-1
Switch(config-flow-monitor)# cache type normal
Related Commands
Command
Description
flow monitor
Creates a flow monitor, or modifies an existing flow monitor, and enters
flow monitor configuration mode.
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Flexible NetFlow Commands
clear flow exporter
clear flow exporter
To clear the statistics for a Flexible NetFlow flow exporter, use the clear flow exporter command in privileged
EXEC mode.
clear flow exporter [[name] exporter-name] statistics
Syntax Description
Command Modes
Command History
Usage Guidelines
name
(Optional) Specifies the name of a flow exporter.
exporter-name
(Optional) Name of a flow exporter that was previously configured.
statistics
Clears the flow exporter statistics.
Privileged EXEC
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The clear flow exporter command removes all statistics from the flow exporter. These statistics will not be
exported and the data gathered in the cache will be lost.
You can view the flow exporter statistics by using the show flow exporter statistics privileged EXEC
command.
Examples
The following example clears the statistics for all of the flow exporters configured on the switch:
Switch# clear flow exporter statistics
The following example clears the statistics for the flow exporter named FLOW-EXPORTER-1:
Switch# clear flow exporter FLOW-EXPORTER-1 statistics
Related Commands
Command
Description
debug flow exporter
Enables debugging output for Flexible NetFlow flow exporters.
show flow exporter
Displays flow exporter status and statistics.
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clear flow monitor
clear flow monitor
To clear a flow monitor cache or flow monitor statistics and to force the export of the data in the flow monitor
cache, use the clear flow monitor command in privileged EXEC mode.
clear flow monitor [name] monitor-name [[cache] force-export| statistics]
Syntax Description
Command Modes
Command History
Usage Guidelines
Note
name
Specifies the name of a flow monitor.
monitor-name
Name of a flow monitor that was previously configured.
cache
(Optional) Clears the flow monitor cache information.
force-export
(Optional) Forces the export of the flow monitor cache statistics.
statistics
(Optional) Clears the flow monitor statistics.
Privileged EXEC
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The clear flow monitor cache command removes all entries from the flow monitor cache. These entries will
not be exported and the data gathered in the cache will be lost.
The statistics for the cleared cache entries are maintained.
The clear flow monitor force-export command removes all entries from the flow monitor cache and exports
them using all flow exporters assigned to the flow monitor. This action can result in a short-term increase in
CPU usage. Use this command with caution.
The clear flow monitor statistics command clears the statistics for this flow monitor.
Note
The current entries statistic will not be cleared by the clear flow monitor statistics command because
this is an indicator of how many entries are in the cache and the cache is not cleared with this command.
You can view the flow monitor statistics by using the show flow monitor statistics privileged EXEC command.
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clear flow monitor
Examples
The following example clears the statistics and cache entries for the flow monitor named FLOW-MONITOR-1:
Switch# clear flow monitor name FLOW-MONITOR-1
The following example clears the statistics and cache entries for the flow monitor named FLOW-MONITOR-1
and forces an export:
Switch# clear flow monitor name FLOW-MONITOR-1 force-export
The following example clears the cache for the flow monitor named FLOW-MONITOR-1 and forces an
export:
Switch# clear flow monitor name FLOW-MONITOR-1 cache force-export
The following example clears the statistics for the flow monitor named FLOW-MONITOR-1:
Switch# clear flow monitor name FLOW-MONITOR-1 statistics
Related Commands
Command
Description
debug flow monitor
Enables debugging output for Flexible NetFlow flow monitors.
show flow monitor
Displays the status and statistics for a Flexible NetFlow flow monitor.
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collect
collect
To configure non-key fields for the flow monitor record and to enable capturing the values in the fields for
the flow created with the record, use the collect command in flow record configuration mode.
collect {counter| interface| timestamp| transport| wireless}
Syntax Description
counter
Configures the number of bytes or packets in a flow as a non-key field for a flow
record. For more information, see collect counter, on page 11.
interface
Configures the input and output interface name as a non-key field for a flow record.
For more information, see collect interface, on page 13.
timestamp
Configures the absolute time of the first seen or last seen packet in a flow as a non-key
field for a flow record. For more information, see collect timestamp absolute, on
page 15.
transport
Enables the collecting of transport TCP flags from a flow record. For more
information, see collect transport tcp flags, on page 17.
wireless
Enables the collection of access point MAC addresses. For more information, see
collect wireless ap mac address (wireless), on page 19.
Command Default
Non-key fields are not configured for the flow monitor record.
Command Modes
Flow record configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The values in non-key fields are added to flows to provide additional information about the traffic in the flows.
A change in the value of a non-key field does not create a new flow. In most cases, the values for non-key
fields are taken from only the first packet in the flow.
The collect commands are used to configure non-key fields for the flow monitor record and to enable capturing
the values in the fields for the flow created with the record. The values in non-key fields are added to flows
to provide additional information about the traffic in the flows. A change in the value of a non-key field does
not create a new flow. In most cases the values for non-key fields are taken from only the first packet in the
flow.
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collect
Note
Examples
Although it is visible in the command-line help string, the flow username keyword is not supported.
The following example configures the total number of bytes in the flows as a non-key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# collect counter bytes long
Related Commands
Command
Description
collect counter
Configures the number of bytes or packets in a flow as a non-key field
for a flow record.
collect interface
Configures the input and output interface as a non-key field for a flow
record.
collect timestamp absolute
Configures the absolute time of the first seen or last seen packet in a
flow as a non-key field for a flow record.
collect transport tcp flags
Enables the collecting of TCP flag values from a flow.
collect wireless ap mac address
(wireless)
Collects the MAC addresses of the access points that the wireless
client is associated with.
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collect counter
collect counter
To configure the number of bytes or packets in a flow as a non-key field for a flow record, use the collect
counter command in flow record configuration mode. To disable the use of the number of bytes or packets
in a flow (counters) as a non-key field for a flow record, use the no form of this command.
collect counter {bytes layer2 long| bytes long| packets long}
no collect counter {bytes layer2 long| bytes long| packets long}
Syntax Description
bytes layer2 long
Configures the number of Layer 2 bytes seen in a flow as a non-key field, and
enables collecting the total number of Layer 2 bytes from the flow using a 64-bit
counter.
bytes long
Configures the number of bytes seen in a flow as a non-key field, and enables
collecting the total number of bytes from the flow using a 64-bit counter.
packets long
Configures the number of packets seen in a flow as a non-key field and enables
collecting the total number of packets from the flow using a 64-bit counter.
Command Default
The number of bytes or packets in a flow is not configured as a non-key field.
Command Modes
Flow record configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The collect counter bytes long command configures a 64-bit counter for the number of bytes seen in a flow.
The collect counter packets long command configures a 64-bit counter that will be incremented for each
packet seen in the flow. It is unlikely that a 64-bit counter will ever restart at 0.
To return this command to its default settings, use the no collect counter or default collect counter flow
record configuration command.
Examples
The following example configures the total number of bytes in the flows as a non-key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)#collect counter bytes long
The following example configures the total number of packets from the flows as a non-key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# collect counter packets long
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collect counter
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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collect interface
collect interface
To configure the input and output interface name as a non-key field for a flow record, use the collect interface
command in flow record configuration mode. To disable the use of the input and output interface as a non-key
field for a flow record, use the no form of this command.
collect interface {input| output}
no collect interface {input| output}
Syntax Description
input
Configures the input interface name as a non-key field and enables collecting the
input interface from the flows.
output
Configures the output interface name as a non-key field and enables collecting the
output interface from the flows.
Command Default
The input and output interface names are not configured as a non-key field.
Command Modes
Flow record configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The Flexible NetFlow collect commands are used to configure non-key fields for the flow monitor record and
to enable capturing the values in the fields for the flow created with the record. The values in non-key fields
are added to flows to provide additional information about the traffic in the flows. A change in the value of
a non-key field does not create a new flow. In most cases, the values for non-key fields are taken from only
the first packet in the flow.
To return this command to its default settings, use the no collect interface or default collect interface flow
record configuration command.
Examples
The following example configures the output interface as a non-key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# collect interface output
The following example configures the input interface as a non-key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# collect interface input
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collect interface
Related Commands
Command
Description
flow exporter
Creates a Flexible NetFlow flow exporter, or modifies an existing Flexible NetFlow
flow exporter, and enters Flexible NetFlow flow exporter configuration mode.
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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collect timestamp absolute
collect timestamp absolute
To configure the absolute time of the first seen or last seen packet in a flow as a non-key field for a flow
record, use the collect timestamp absolute command in flow record configuration mode. To disable the use
of the first seen or last seen packet in a flow as a non-key field for a flow record, use the no form of this
command.
collect timestamp absolute {first| last}
no collect timestamp absolute {first| last}
Syntax Description
first
Configures the absolute time of the first seen packet in a flow as a non-key field and
enables collecting time stamps from the flows.
last
Configures the absolute time of the last seen packet in a flow as a non-key field and
enables collecting time stamps from the flows.
Command Default
The absolute time field is not configured as a non-key field.
Command Modes
Flow record configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
The collect commands are used to configure non-key fields for the flow monitor record and to enable capturing
the values in the fields for the flow created with the record. The values in non-key fields are added to flows
to provide additional information about the traffic in the flows. A change in the value of a non-key field does
not create a new flow. In most cases the values for non-key fields are taken from only the first packet in the
flow.
Examples
The following example configures time stamps based on the absolute time of the first seen packet in a flow
as a non-key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# collect timestamp absolute first
The following example configures time stamps based on the absolute time of the last seen packet in a flow
as a non-key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# collect timestamp absolute last
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collect timestamp absolute
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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collect transport tcp flags
collect transport tcp flags
To enable the collecting of transport TCP flags from a flow, use the collect transport tcp flags command in
flow record configuration mode. To disable the collecting of transport TCP flags from the flow, use the no
form of this command.
collect transport tcp flags
no collect transport tcp flags
Syntax Description
This command has no arguments or keywords.
Command Default
The transport layer fields are not configured as a non-key field.
Command Modes
Flow record configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The values of the transport layer fields are taken from all packets in the flow. You cannot specify which TCP
flag to collect. You can only specify to collect transport TCP flags. All TCP flags will be collected with this
command. The following transport TCP flags are collected:
• ack—TCP acknowledgement flag
• cwr—TCP congestion window reduced flag
• ece—TCP ECN echo flag
• fin—TCP finish flag
• psh—TCP push flag
• rst—TCP reset flag
• syn—TCP synchronize flag
• urg—TCP urgent flag
To return this command to its default settings, use the no collect collect transport tcp flags or default collect
collect transport tcp flags flow record configuration command.
Examples
The following example collects the TCP flags from a flow:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# collect transport tcp flags
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collect transport tcp flags
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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collect wireless ap mac address (wireless)
collect wireless ap mac address (wireless)
To enable the collection of MAC addresses of the access points that the wireless client is associated with, use
the collect wireless ap mac address command in the flow record configuration mode. To disable the collection
of access point MAC addresses, use the no form of this command.
collect wireless ap mac address
no collect wirelessap mac address
Syntax Description
This command has no arguments or keywords.
Command Default
The collection of access point MAC addresses is not enabled by default.
Command Modes
Flow record configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
The Flexible NetFlow collect commands are used to configure non-key fields for the flow monitor record and
to enable capturing the values in the fields for the flow created with the record. The values in non-key fields
are added to flows to provide additional information about the traffic in the flows. A change in the value of
a non-key field does not create a new flow. In most cases, the values for non-key fields are taken from only
the first packet in the flow.
Examples
The following example configures the flow record to enable the collection of MAC addresses of the access
points that the wireless client is associated with:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# collect wireless ap mac address
Related Commands
Command
Description
collect
Configures non-key fields for the flow monitor record and enables capturing the
values in the fields for the flow created with the record.
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collect wireless client mac address (wireless)
collect wireless client mac address (wireless)
To enable the collection of MAC addresses of the wireless clients that the access point is associated with, use
the collect wireless client mac address command in the flow record configuration mode. To disable the
collection of access point MAC addresses, use the no form of this command.
collect wirelessclient mac address
no collect wireless client mac address
Syntax Description
This command has no arguments or keywords.
Command Default
The collection of wireless client MAC addresses is not enabled by default.
Command Modes
Flow record configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
The Flexible NetFlow collect commands are used to configure non-key fields for the flow monitor record and
to enable capturing the values in the fields for the flow created with the record. The values in non-key fields
are added to flows to provide additional information about the traffic in the flows. A change in the value of
a non-key field does not create a new flow. In most cases, the values for non-key fields are taken from only
the first packet in the flow.
Examples
The following example configures the flow record to enable the collection of MAC addresses of the access
points that the wireless client is associated with:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# collect wireless client mac address
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datalink flow monitor
datalink flow monitor
To apply a Flexible NetFlow flow monitor to an interface, use the datalink flow monitor command in interface
configuration mode. To disable a Flexible NetFlow flow monitor, use the no form of this command.
datalink flow monitor monitor-name {input| output| sampler sampler-name}
no datalink flow monitor monitor-name {input| output| sampler sampler-name}
Syntax Description
monitor-name
Name of the flow monitor to apply to the interface.
sampler sampler-name
Enables the specified flow sampler for the flow monitor.
input
Monitors traffic that the switch receives on the interface.
output
Monitors traffic that the switch sends on the interface.
Command Default
A flow monitor is not enabled.
Command Modes
Interface configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Before you apply a flow monitor to an interface with the datalink flow monitor command, you must have
already created the flow monitor using the flow monitor global configuration command and the flow sampler
using the sampler global configuration command.
To enable a flow sampler for the flow monitor, you must have already created the sampler.
Note
Examples
The datalink flow monitor command only monitors non-IPv4 and non-IPv6 traffic. To monitor IPv4
traffic, use the ip flow monitor command. To monitor IPv6 traffic, use the ipv6 flow monitor command.
This example shows how to enable Flexible NetFlow datalink monitoring on an interface:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# datalink flow monitor FLOW-MONITOR-1 sampler FLOW-SAMPLER-1 input
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datalink flow monitor
Related Commands
Command
Description
flow monitor
Creates a flow monitor, or modifies an existing flow monitor, and enters
flow monitor configuration mode.
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datalink flow monitor (wireless)
datalink flow monitor (wireless)
To enable NetFlow monitoring in a WLAN, use the datalink flow monitor command in WLAN configuration
mode. To disable NetFlow monitoring, use the no form of this command.
datalink flow monitor datalink-monitor-name{input | output}
no datalink flow monitor datalink-monitor-name{input | output}
Syntax Description
datalink-monitor-name
Flow monitor name. The name is case sensitive and consists of alphanumeric
characters, with a maximum of 31 characters.
input
Specifies the NetFlow monitor for ingress traffic.
output
Specifies the NetFlow monitor for egress traffic.
Command Default
Flow monitor is not configured by default for WLAN interface.
Command Modes
WLAN configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
Before you apply a flow monitor to an interface with the datalink flow monitor command, you must have
already created the flow monitor using the flow monitor global configuration command.
Examples
This example shows how to enable NetFlow monitoring on a WLAN:
Switch(config)# wlan wlan1
Switch(config-wlan)# datalink flow monitor test output
This example shows how to disable NetFlow monitor on a WLAN:
Switch(config)# wlan wlan1
Switch(config-wlan)# no datalink flow monitor test output
Related Commands
Command
Description
flow monitor
Creates a flow monitor, or modifies an existing flow monitor, and enters
flow monitor configuration mode.
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debug flow exporter
debug flow exporter
To enable debugging output for Flexible NetFlow flow exporters, use the debug flow exporter command in
privileged EXEC mode. To disable debugging output, use the no form of this command.
debug flow exporter [[name] exporter-name] [error| event| packets number]
no debug flow exporter [[name] exporter-name] [error| event| packets number]
Syntax Description
Command Modes
Command History
Examples
name
(Optional) Specifies the name of a flow exporter.
exporter-name
(Optional) The name of a flow exporter that was previously configured.
error
(Optional) Enables debugging for flow exporter errors.
event
(Optional) Enables debugging for flow exporter events.
packets
(Optional) Enables packet-level debugging for flow exporters.
number
(Optional) The number of packets to debug for packet-level debugging of
flow exporters. The range is 1 to 65535.
Privileged EXEC
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The following example indicates that a flow exporter packet has been queued for process send:
Switch# debug flow exporter
May 21 21:29:12.603: FLOW EXP: Packet queued for process send
Related Commands
Command
Description
clear flow exporter
Clears the statistics for a Flexible NetFlow flow exporter.
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debug flow monitor
debug flow monitor
To enable debugging output for Flexible NetFlow flow monitors, use the debug flow monitor command in
privileged EXEC mode. To disable debugging output, use the no form of this command.
debug flow monitor [error| [name] monitor-name [cache [error]| error| packets packets]]
no debug flow monitor [error| [name] monitor-name [cache [error]| error| packets packets]]
Syntax Description
Command Modes
Command History
Examples
error
(Optional) Enables debugging for flow monitor errors for all flow monitors
or for the specified flow monitor.
name
(Optional) Specifies the name of a flow monitor.
monitor-name
(Optional) Name of a flow monitor that was previously configured.
cache
(Optional) Enables debugging for the flow monitor cache.
cache error
(Optional) Enables debugging for flow monitor cache errors.
packets
(Optional) Enables packet-level debugging for flow monitors.
packets
(Optional) Number of packets to debug for packet-level debugging of flow
monitors. The range is 1 to 65535.
Privileged EXEC
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The following example shows that the cache for FLOW-MONITOR-1 was deleted:
Switch# debug flow monitor FLOW-MONITOR-1 cache
May 21 21:53:02.839: FLOW MON: 'FLOW-MONITOR-1' deleted cache
Related Commands
Command
Description
clear flow monitor
Clears a flow monitor cache or flow monitor statistics and forces the export
of the data in the flow monitor cache.
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debug flow record
debug flow record
To enable debugging output for Flexible NetFlow flow records, use the debug flow record command in
privileged EXEC mode. To disable debugging output, use the no form of this command.
debug flow record [[name] record-name| options {sampler-table}| [detailed| error]]
no debug flow record [[name] record-name| options {sampler-table}| [detailed| error]]
Syntax Description
Command Modes
Command History
Examples
name
(Optional) Specifies the name of a flow record.
record-name
(Optional) Name of a user-defined flow record that was previously
configured.
options
(Optional) Includes information on other flow record options.
sampler-table
(Optional) Includes information on the sampler tables.
detailed
(Optional) Displays detailed information.
error
(Optional) Displays errors only.
Privileged EXEC
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The following example enables debugging for the flow record:
Switch# debug flow record FLOW-record-1
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debug sampler
debug sampler
To enable debugging output for Flexible NetFlow samplers, use the debug sampler command in privileged
EXEC mode. To disable debugging output, use the no form of this command.
debug sampler [detailed| error| [name] sampler-name [detailed| error| sampling samples]]
no debug sampler [detailed| error| [name] sampler-name [detailed| error| sampling]]
Syntax Description
Command Modes
Command History
Examples
detailed
(Optional) Enables detailed debugging for sampler elements.
error
(Optional) Enables debugging for sampler errors.
name
(Optional) Specifies the name of a sampler.
sampler-name
(Optional) Name of a sampler that was previously configured.
sampling samples
(Optional) Enables debugging for sampling and specifies the number of
samples to debug.
Privileged EXEC
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The following sample output shows that the debug process has obtained the ID for the sampler named
SAMPLER-1:
Switch#
*May 28
get ID
*May 28
get ID
debug sampler detailed
04:14:30.883: Sampler: Sampler(SAMPLER-1: flow monitor FLOW-MONITOR-1 (ip,Et1/0,O)
succeeded:1
04:14:30.971: Sampler: Sampler(SAMPLER-1: flow monitor FLOW-MONITOR-1 (ip,Et0/0,I)
succeeded:1
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description
description
To configure a description for a flow monitor, flow exporter, or flow record, use the description command
in the appropriate configuration mode. To remove a description, use the no form of this command.
description description
no description description
Syntax Description
description
Text string that describes the flow monitor, flow exporter, or flow record.
Command Default
The default description for a flow sampler, flow monitor, flow exporter, or flow record is "User defined."
Command Modes
The following command modes are supported:
Flow exporter configuration
Flow monitor configuration
Flow record configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
To return this command to its default setting, use the no description or default description command in the
appropriate configuration mode.
Examples
The following example configures a description for a flow monitor:
Switch(config)# flow monitor FLOW-MONITOR-1
Switch(config-flow-monitor)# description Monitors traffic to 172.16.0.1 255.255.0.0
Related Commands
Command
Description
flow exporter
Creates a Flexible NetFlow flow exporter, or modifies an existing Flexible NetFlow
flow exporter, and enters Flexible NetFlow flow exporter configuration mode.
flow monitor
Creates a flow monitor, or modifies an existing flow monitor, and enters flow
monitor configuration mode.
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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destination
destination
To configure an export destination for a flow exporter, use the destination command in flow exporter
configuration mode. To remove an export destination for a flow exporter, use the no form of this command.
destination {hostname| ip-address} vrf vrf-label
no destination {hostname| ip-address} vrf vrf-label
Syntax Description
hostname
Hostname of the device to which you want to send the NetFlow information.
ip-address
IPv4 address of the workstation to which you want to send the NetFlow information.
vrf
(Optional) Specifies that the export data packets are to be sent to the named Virtual
Private Network (VPN) routing and forwarding (VRF) instance for routing to the
destination, instead of to the global routing table.
vrf-label
Name of the VRF instance.
Command Default
An export destination is not configured.
Command Modes
Flow exporter configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Each flow exporter can have only one destination address or hostname.
When you configure a hostname instead of the IP address for the device, the hostname is resolved immediately
and the IPv4 address is stored in the running configuration. If the hostname-to-IP-address mapping that was
used for the original Domain Name System (DNS) name resolution changes dynamically on the DNS server,
the switch does not detect this, and the exported data continues to be sent to the original IP address, resulting
in a loss of data.
To return this command to its default setting, use the no destination or default destination command in flow
exporter configuration mode.
Examples
The following example shows how to configure the networking device to export the Flexible NetFlow cache
entry to a destination system:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)# destination 10.0.0.4
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destination
The following example shows how to configure the networking device to export the Flexible NetFlow cache
entry to a destination system using a VRF named VRF-1:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)# destination 172.16.0.2 vrf VRF-1
Related Commands
Command
Description
flow exporter
Creates a Flexible NetFlow flow exporter, or modifies an existing Flexible
NetFlow flow exporter, and enters Flexible NetFlow flow exporter configuration
mode.
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dscp
dscp
To configure a differentiated services code point (DSCP) value for flow exporter datagrams, use the dscp
command in flow exporter configuration mode. To remove a DSCP value for flow exporter datagrams, use
the no form of this command.
dscp dscp
no dscp dscp
Syntax Description
dscp
DSCP to be used in the DSCP field in exported datagrams. The range is 0 to 63. The
default is 0.
Command Default
The differentiated services code point (DSCP) value is 0.
Command Modes
Flow exporter configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
To return this command to its default setting, use the no dscp or default dscp flow exporter configuration
command.
Examples
The following example sets 22 as the value of the DSCP field in exported datagrams:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)# dscp 22
Related Commands
Command
Description
flow exporter
Creates a Flexible NetFlow flow exporter, or modifies an existing Flexible
NetFlow flow exporter, and enters Flexible NetFlow flow exporter configuration
mode.
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export-protocol netflow-v9
export-protocol netflow-v9
To configure NetFlow Version 9 export as the export protocol for a Flexible NetFlow exporter, use the
export-protocol netflow-v9 command in flow exporter configuration mode.
export-protocol netflow-v9
Syntax Description
This command has no arguments or keywords.
Command Default
NetFlow Version 9 is enabled.
Command Modes
Flow exporter configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
The switch does not support NetFlow v5 export format, only NetFlow v9 export format is supported.
Examples
The following example configures NetFlow Version 9 export as the export protocol for a NetFlow exporter:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)# export-protocol netflow-v9
Related Commands
Command
Description
flow exporter
Creates a Flexible NetFlow flow exporter, or modifies an existing Flexible
NetFlow flow exporter, and enters Flexible NetFlow flow exporter configuration
mode.
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exporter
exporter
To add a flow exporter for a flow monitor, use the exporter command in the appropriate configuration mode.
To remove a flow exporter for a flow monitor, use the no form of this command.
exporter exporter-name
no exporter exporter-name
Syntax Description
exporter-name
Name of a flow exporter that was previously configured.
Command Default
An exporter is not configured.
Command Modes
Flow monitor configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
You must have already created a flow exporter by using the flow exporter command before you can apply
the flow exporter to a flow monitor with the exporter command.
To return this command to its default settings, use the no exporter or default exporter flow monitor
configuration command.
Examples
The following example configures an exporter for a flow monitor:
Switch(config)# flow monitor FLOW-MONITOR-1
Switch(config-flow-monitor)# exporter EXPORTER-1
Related Commands
Command
Description
flow exporter
Creates a Flexible NetFlow flow exporter, or modifies an existing Flexible
NetFlow flow exporter, and enters Flexible NetFlow flow exporter configuration
mode.
flow monitor
Creates a flow monitor, or modifies an existing flow monitor, and enters flow
monitor configuration mode.
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flow exporter
flow exporter
To create a Flexible NetFlow flow exporter, or to modify an existing Flexible NetFlow flow exporter, and
enter Flexible NetFlow flow exporter configuration mode, use the flow exporter command in global
configuration mode. To remove a Flexible NetFlow flow exporter, use the no form of this command.
flow exporter exporter-name
no flow exporter exporter-name
Syntax Description
exporter-name
Name of the flow exporter that is being created or modified.
Command Default
Flexible NetFlow flow exporters are not present in the configuration.
Command Modes
Global configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
Flow exporters export the data in the flow monitor cache to a remote system, such as a server running NetFlow
collector, for analysis and storage. Flow exporters are created as separate entities in the configuration. Flow
exporters are assigned to flow monitors to provide data export capability for the flow monitors. You can create
several flow exporters and assign them to one or more flow monitors to provide several export destinations.
You can create one flow exporter and apply it to several flow monitors.
Examples
The following example creates a flow exporter named FLOW-EXPORTER-1 and enters Flexible NetFlow
flow exporter configuration mode:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)#
Related Commands
Command
Description
clear flow exporter
Clears the statistics for a Flexible NetFlow flow exporter.
debug flow exporter
Enables debugging output for Flexible NetFlow flow exporters.
show flow exporter
Displays flow exporter status and statistics.
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flow monitor
flow monitor
To create a flow monitor, or to modify an existing flow monitor, and enter flow monitor configuration mode,
use the flow monitor command in global configuration mode. To remove a flow monitor, use the no form of
this command.
flow monitor monitor-name
no flow monitor monitor-name
Syntax Description
monitor-name
Name of the flow monitor that is being created or modified.
Command Default
Flexible NetFlow flow monitors are not present in the configuration.
Command Modes
Global configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
Flow monitors are the Flexible NetFlow component that is applied to interfaces to perform network traffic
monitoring. Flow monitors consist of a flow record and a cache. You add the record to the flow monitor after
you create the flow monitor. The flow monitor cache is automatically created at the time the flow monitor is
applied to the first interface. Flow data is collected from the network traffic during the monitoring process
based on the key and nonkey fields in the flow monitor's record and stored in the flow monitor cache.
Examples
The following example creates a flow monitor named FLOW-MONITOR-1 and enters flow monitor
configuration mode:
Switch(config)# flow monitor FLOW-MONITOR-1
Switch(config-flow-monitor)#
Related Commands
Command
Description
clear flow monitor
Clears a flow monitor cache or flow monitor statistics and forces the
export of the data in the flow monitor cache.
debug flow monitor
Enables debugging output for Flexible NetFlow flow monitors.
show flow monitor
Displays the status and statistics for a Flexible NetFlow flow monitor.
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flow record
flow record
To create a Flexible NetFlow flow record, or to modify an existing Flexible NetFlow flow record, and enter
Flexible NetFlow flow record configuration mode, use the flow record command in global configuration
mode. To remove a Flexible NetFlow record, use the no form of this command.
flow record record-name
no flow record record-name
Syntax Description
record-name
Name of the flow record that is being created or modified.
Command Default
A Flexible NetFlow flow record is not configured.
Command Modes
Global configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
A flow record defines the keys that Flexible NetFlow uses to identify packets in the flow, as well as other
fields of interest that Flexible NetFlow gathers for the flow. You can define a flow record with any combination
of keys and fields of interest. The switch supports a rich set of keys. A flow record also defines the types of
counters gathered per flow. You can configure 64-bit packet or byte counters.
Examples
The following example creates a flow record named FLOW-RECORD-1, and enters Flexible NetFlow flow
record configuration mode:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)#
Related Commands
Command
Description
show flow record
Displays the status and statistics for a Flexible NetFlow flow record.
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ip flow monitor
ip flow monitor
To enable a Flexible NetFlow flow monitor for IPv4 traffic that the switch is receiving or forwarding, use the
ip flow monitor command in interface configuration mode. To disable a flow monitor, use the no form of
this command.
ip flow monitor monitor-name [sampler sampler-name] {input| output}
no ip flow monitor monitor-name [sampler sampler-name] {input| output}
Syntax Description
monitor-name
Name of the flow monitor to apply to the interface.
sampler sampler-name
(Optional) Enables the specified flow sampler for the flow monitor.
input
Monitors IPv4 traffic that the switch receives on the interface.
output
Monitors IPv4 traffic that the switch transmits on the interface.
Command Default
A flow monitor is not enabled.
Command Modes
Interface configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Before you can apply a flow monitor to an interface with the ip flow monitor command, you must have
already created the flow monitor using the flow monitor global configuration command.
When you add a sampler to a flow monitor, only packets that are selected by the named sampler will be entered
into the cache to form flows. Each use of a sampler causes separate statistics to be stored for that usage.
You cannot add a sampler to a flow monitor after the flow monitor has been enabled on the interface. You
must first remove the flow monitor from the interface and then enable the same flow monitor with a sampler.
Note
The statistics for each flow must be scaled to give the expected true usage. For example, with a 1 in 100
sampler it is expected that the packet and byte counters will have to be multiplied by 100.
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ip flow monitor
Examples
The following example enables a flow monitor for monitoring input traffic:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# ip flow monitor FLOW-MONITOR-1 input
The following example enables the same flow monitor on the same interface for monitoring input and output
traffic:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# ip flow monitor FLOW-MONITOR-1 input
Switch(config-if)# ip flow monitor FLOW-MONITOR-1 output
The following example enables two different flow monitors on the same interface for monitoring input and
output traffic:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# ip flow monitor FLOW-MONITOR-1 input
Switch(config-if)# ip flow monitor FLOW-MONITOR-2 output
The following example enables the same flow monitor on two different interfaces for monitoring input and
output traffic:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# ip flow monitor FLOW-MONITOR-1 input
Switch(config-if)# exit
Switch(config)# interface gigabitethernet2/0/3
Switch(config-if)# ip flow monitor FLOW-MONITOR-1 output
The following example enables a flow monitor for monitoring input traffic, with a sampler to limit the input
packets that are sampled:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# ip flow monitor FLOW-MONITOR-1 sampler SAMPLER-1 input
The following example shows what happens when you try to add a sampler to a flow monitor that has already
been enabled on an interface without a sampler:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# ip flow monitor FLOW-MONITOR-1 sampler SAMPLER-2 input
% Flow Monitor: Flow Monitor 'FLOW-MONITOR-1' is already on in full mode and cannot be
enabled with a sampler.
The following example shows how to remove a flow monitor from an interface so that it can be enabled with
the sampler:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# no ip flow monitor FLOW-MONITOR-1 input
Switch(config-if)# ip flow monitor FLOW-MONITOR-1 sampler SAMPLER-2 input
Related Commands
Command
Description
flow monitor
Creates a flow monitor, or modifies an existing flow monitor, and enters flow
monitor configuration mode.
sampler
Creates a Flexible NetFlow flow sampler, or modifies an existing Flexible
NetFlow flow sampler.
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ipv6 flow monitor
ipv6 flow monitor
To enable a flow monitor for IPv6 traffic that the switch is receiving or forwarding, use the ipv6 flow monitor
command in interface configuration mode. To disable a flow monitor, use the no form of this command.
ipv6 flow monitor monitor-name [sampler sampler-name] {input| output}
no ipv6 flow monitor monitor-name [sampler sampler-name] {input| output}
Syntax Description
monitor-name
Name of the flow monitor to apply to the interface.
sampler sampler-name
(Optional) Enables the specified flow sampler for the flow monitor.
input
Monitors IPv6 traffic that the switch receives on the interface.
output
Monitors IPv6 traffic that the switch transmits on the interface.
Command Default
A flow monitor is not enabled.
Command Modes
Interface configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Before you can apply a flow monitor to the interface with the ipv6 flow monitor command, you must have
already created the flow monitor using the flow monitor global configuration command.
When you add a sampler to a flow monitor, only packets that are selected by the named sampler will be entered
into the cache to form flows. Each use of a sampler causes separate statistics to be stored for that usage.
You cannot add a sampler to a flow monitor after the flow monitor has been enabled on the interface. You
must first remove the flow monitor from the interface and then enable the same flow monitor with a sampler.
Note
The statistics for each flow must be scaled to give the expected true usage. For example, with a 1 in 100
sampler it is expected that the packet and byte counters will have to be multiplied by 100.
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ipv6 flow monitor
Examples
The following example enables a flow monitor for monitoring input traffic:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# ipv6 flow monitor FLOW-MONITOR-1 input
The following example enables the same flow monitor on the same interface for monitoring input and output
traffic:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# ipv6 flow monitor FLOW-MONITOR-1 input
Switch(config-if)# ipv6 flow monitor FLOW-MONITOR-1 output
The following example enables two different flow monitors on the same interface for monitoring input and
output traffic:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# ipv6 flow monitor FLOW-MONITOR-1 input
Switch(config-if)# ipv6 flow monitor FLOW-MONITOR-2 output
The following example enables the same flow monitor on two different interfaces for monitoring input and
output traffic:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# ipv6 flow monitor FLOW-MONITOR-1 input
Switch(config-if)# exit
Switch(config)# interface gigabitethernet2/0/3
Switch(config-if)# ipv6 flow monitor FLOW-MONITOR-1 output
The following example enables a flow monitor for monitoring input traffic, with a sampler to limit the input
packets that are sampled:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# ipv6 flow monitor FLOW-MONITOR-1 sampler SAMPLER-1 input
The following example shows what happens when you try to add a sampler to a flow monitor that has already
been enabled on an interface without a sampler:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# ipv6 flow monitor FLOW-MONITOR-1 sampler SAMPLER-2 input
% Flow Monitor: Flow Monitor 'FLOW-MONITOR-1' is already on in full mode and cannot be
enabled with a sampler.
The following example shows how to remove a flow monitor from an interface so that it can be enabled with
the sampler:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# no ipv6 flow monitor FLOW-MONITOR-1 input
Switch(config-if)# ipv6 flow monitor FLOW-MONITOR-1 sampler SAMPLER-2 input
Related Commands
Command
Description
flow monitor
Creates a flow monitor, or modifies an existing flow monitor, and enters flow
monitor configuration mode.
sampler
Creates a Flexible NetFlow flow sampler, or modifies an existing Flexible
NetFlow flow sampler.
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ip flow monitor (wireless)
ip flow monitor (wireless)
To configure IPv4 NetFlow monitoring, use the ip flow monitor command in WLAN configuration mode.
To remove IPv4 NetFlow monitoring, use the no form of this command.
ip flow monitor ip-monitor-name {input | output}
no ip flow monitor ip-monitor-name {input | output}
Syntax Description
ip-monitor-name
Flow monitor name.
input
Enables a flow monitor for IPv4 ingress traffic.
output
Enables a flow monitor for IPv4 egress traffic.
Command Default
A flow monitor is not enabled.
Command Modes
WLAN configuration
Usage Guidelines
Before you can apply a IPv4 flow monitor to an interface with the ip flow monitor command, you need to
create the flow monitor using the flow monitor global configuration command.
Command History
Examples
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
This example shows how to configure an IP flow monitor for ingress traffic:
Switch(config)# wlan wlan1
Switch(config-wlan)# ip flow monitor test input
This example shows how to disable an IP flow monitor:
Switch(config)# wlan wlan1
Switch(config-wlan)# no ip flow monitor test input
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ipv6 flow monitor (wireless)
ipv6 flow monitor (wireless)
To configure IPv6 NetFlow monitoring, use the ipv6 flow monitor command in wlan configuration mode.
To remove IPv6 NetFlow monitoring, use the no form of this command.
ipv6 flow monitor ipv6-monitor-name {input | output}
no ipv6 flow monitor ipv6-monitor-name {input | output}
Syntax Description
ipv6-monitor-name
Flow monitor name.
input
Enables a flow monitor for IPv6 ingress traffic.
output
Enables a flow monitor for IPv6 egress traffic.
Command Default
A flow monitor is not enabled.
Command Modes
Wlan configuration
Usage Guidelines
Before you can apply an IPv6 flow monitor to an interface with the ipv6 flow monitor command, you need
to create the flow monitor using the flow monitor global configuration command.
The collect commands are used to configure nonkey fields for the flow monitor record and to enable capturing
the values in the fields for the flow created with the record. The values in nonkey fields are added to flows to
provide additional information about the traffic in the flows. A change in the value of a nonkey field does not
create a new flow. In most cases the values for nonkey fields are taken from only the first packet in the flow.
Command History
Examples
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
This example shows how to configure an IPv6 flow monitor for ingress traffic:
Switch(config)# wlan wlan1
Switch(config-wlan)# ipv6 flow monitor test input
This example shows how to disable an IPv6 flow monitor:
Switch(config)# wlan wlan1
Switch(config-wlan)# no ipv6 flow monitor test input
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match application name (wireless)
match application name (wireless)
This command is specific to the Application Visibility and Control (AVC) feature. To specify a match to the
application name, use the match application name in flow record configuration mode. To disable the use of
the application name as a key field for a flow record, use the no form of this command.
match application name
no match application name
Syntax Description
This command has no arguments or keywords.
Command Default
The application name is not configured as a key field, by default.
Command Modes
Flow record configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
This command is specific to the AVC feature. For more information, see the System Management Configuration
Guide, Cisco IOS XE Release 3SE.
Examples
This command is specific to the AVC feature. For examples, see the System Management Configuration
Guide, Cisco IOS XE Release 3SE.
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match datalink dot1q priority
match datalink dot1q priority
To configure the 802.1Q (dot1q) priority value as a key field for a flow record, use the match datalink dot1q
priority command in flow record configuration mode. To disable the use of the priority as a key field for a
flow record, use the no form of this command.
match datalink dot1q priority
no match datalink dot1q priority
Syntax Description
This command has no arguments or keywords.
Command Default
The priority field is not configured as a key field.
Command Modes
Flow record configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
The observation point of the match datalink dot1q priority command is the interface to which the flow
monitor that contains the flow record with the command is applied.
Examples
The following example configures the 802.1Q priority as a key field for a flow record:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match datalink dot1q priority
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match datalink dot1q vlan
match datalink dot1q vlan
To configure the 802.1Q (dot1q) VLAN value as a key field for a flow record, use the match datalink dot1q
vlan command in flow record configuration mode. To disable the use of the 802.1Q VLAN value as a key
field for a flow record, use the no form of this command.
match datalink dot1q vlan {input| output}
no match datalink dot1q vlan {input| output}
Syntax Description
input
Configures the VLAN ID of traffic being received by the switch as a key field.
output
Configures the VLAN ID of traffic being transmitted by the switch as a key field.
Command Default
The 802.1Q VLAN ID is not configured as a key field.
Command Modes
Flow record configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
The input and output keywords of the match datalink dot1q vlan command are used to specify the observation
point that is used by the match datalink dot1q vlan command to create flows based on the unique 802.1q
VLAN IDs in the network traffic.
Examples
The following example configures the 802.1Q VLAN ID of traffic being received by the switch as a key field
for a flow record:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match datalink dot1q vlan input
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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Flexible NetFlow Commands
match datalink ethertype
match datalink ethertype
To configure the EtherType of the packet as a key field for a flow record, use the match datalink ethertype
command in flow record configuration mode. To disable the EtherType of the packet as a key field for a flow
record, use the no form of this command.
match datalink ethertype
no match datalink ethertype
Syntax Description
This command has no arguments or keywords.
Command Default
The EtherType of the packet is not configured as a key field.
Command Modes
Flow record configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
When you configure the EtherType of the packet as a key field for a flow record using the match datalink
ethertype command, the traffic flow that is created is based on the type of flow monitor that is assigned to
the interface:
• When a datalink flow monitor is assigned to an interface using the datalink flow monitor interface
configuration command, it creates unique flows for different Layer 2 protocols.
• When an IP flow monitor is assigned to an interface using the ip flow monitor interface configuration
command, it creates unique flows for different IPv4 protocols.
• When an IPv6 flow monitor is assigned to an interface using the ipv6 flow monitor interface configuration
command, it creates unique flows for different IPv6 protocols.
To return this command to its default settings, use the no match datalink ethertype or default match datalink
ethertype flow record configuration command.
Examples
The following example configures the EtherType of the packet as a key field for a Flexible NetFlow flow
record:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match datalink ethertype
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match datalink ethertype
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match datalink mac
match datalink mac
To configure the use of MAC addresses as a key field for a flow record, use the match datalink mac command
in flow record configuration mode. To disable the use of MAC addresses as a key field for a flow record, use
the no form of this command.
match datalink mac {destination address {input| output}| source address {input| output}}
no match datalink mac {destination address{input| output}| source address{input| output}}
Syntax Description
destination address
Configures the use of the destination MAC address as a key field.
input
Specifies the MAC address of input packets.
output
Specifies the MAC address of output packets.
source address
Configures the use of the source MAC address as a key field.
Command Default
MAC addresses are not configured as a key field.
Command Modes
Flow record configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
The input and output keywords are used to specify the observation point that is used by the match datalink
mac command to create flows based on the unique MAC addressees in the network traffic.
Note
When a datalink flow monitor is assigned to an interface or VLAN record, it creates flows only for non-IPv6
or non-IPv4 traffic.
To return this command to its default settings, use the no match datalink mac or default match datalink
mac flow record configuration command.
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Examples
The following example configures the use of the source MAC addresses of packets that are transmitted by
the switch as a key field for a flow record:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match datalink mac source address output
The following example configures the use of the destination MAC address of packets that are received by the
switch as a key field for a flow record:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match datalink mac destination address input
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match datalink vlan
match datalink vlan
To configure the VLAN ID as a key field for a flow record, use the match datalink vlan command in flow
record configuration mode. To disable the use of the VLAN ID value as a key field for a flow record, use the
no form of this command.
match datalink vlan {input| output}
no match datalink vlan {input| output}
Syntax Description
input
Configures the VLAN ID of traffic being received by the switch as a key field.
output
Configures the VLAN ID of traffic being transmitted by the switch as a key field.
Command Default
The VLAN ID is not configured as a key field.
Command Modes
Flow record configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
The input and output keywords of the match datalink vlan command are used to specify the observation
point that is used by the match datalink vlan command to create flows based on the unique VLAN IDs in
the network traffic.
Examples
The following example configures the VLAN ID of traffic being received by the switch as a key field for a
flow record:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match datalink vlan input
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match flow direction
match flow direction
To configure the flow direction as key fields for a flow record, use the match flow direction command in
flow record configuration mode. To disable the use of the flow direction as key fields for a flow record, use
the no form of this command.
match flow direction
no match flow direction
Syntax Description
This command has no arguments or keywords.
Command Default
The flow direction is not configured as key fields.
Command Modes
Flow record configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
The match flow direction command captures the direction of the flow as a key field. This feature is most
useful when a single flow monitor is configured for input and output flows. It can be used to find and eliminate
flows that are being monitored twice, once on input and once on output. This command can help to match up
pairs of flows in the exported data when the two flows are flowing in opposite directions.
Examples
The following example configures the direction the flow was monitored in as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match flow direction
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match interface
match interface
To configure the input and output interfaces as key fields for a flow record, use the match interface command
in flow record configuration mode. To disable the use of the input and output interfaces as key fields for a
flow record, use the no form of this command.
match interface {input| output}
no match interface {input| output}
Syntax Description
input
Configures the input interface as a key field.
output
Configures the output interface as a key field.
Command Default
The input and output interfaces are not configured as key fields.
Command Modes
Flow record configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
Examples
The following example configures the input interface as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match interface input
The following example configures the output interface as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match interface output
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match ipv4
match ipv4
To configure one or more of the IPv4 fields as a key field for a flow record, use the match ipv4 command in
flow record configuration mode. To disable the use of one or more of the IPv4 fields as a key field for a flow
record, use the no form of this command.
match ipv4 {destination address| protocol| source address| tos| ttl| version}
no match ipv4 {destination address| protocol| source address| tos| ttl| version}
Syntax Description
destination address
Configures the IPv4 destination address as a key field. For more information
see match ipv4 destination address, on page 55.
protocol
Configures the IPv4 protocol as a key field.
source address
Configures the IPv4 destination address as a key field. For more information
see match ipv4 source address, on page 56.
tos
Configures the IPv4 ToS as a key field.
ttl
Configures the IPv4 time-to-live (TTL) field as a key field for a flow record.
For more information see match ipv4 ttl, on page 57.
version
Configures the IP version from IPv4 header as a key field.
Command Default
The use of one or more of the IPv4 fields as a key field for a user-defined flow record is not enabled.
Command Modes
Flow record configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
Examples
The following example configures the IPv4 protocol as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match ipv4 protocol
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match ipv4
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match ipv4 destination address
match ipv4 destination address
To configure the IPv4 destination address as a key field for a flow record, use the match ipv4 destination
address command in flow record configuration mode. To disable the IPv4 destination address as a key field
for a flow record, use the no form of this command.
match ipv4 destination address
no match ipv4 destination address
Syntax Description
This command has no arguments or keywords.
Command Default
The IPv4 destination address is not configured as a key field.
Command Modes
Flow record configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
To return this command to its default settings, use the no match ipv4 destination address or default match
ipv4 destination address flow record configuration command.
Examples
The following example configures the IPv4 destination address as a key field for a flow record:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match ipv4 destination address
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match ipv4 source address
match ipv4 source address
To configure the IPv4 source address as a key field for a flow record, use the match ipv4 source address
command in flow record configuration mode. To disable the use of the IPv4 source address as a key field for
a flow record, use the no form of this command.
match ipv4 source address
no match ipv4 source address
Syntax Description
This command has no arguments or keywords.
Command Default
The IPv4 source address is not configured as a key field.
Command Modes
Flow record configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
To return this command to its default settings, use the no match ipv4 source address or default match ipv4
source address flow record configuration command.
Examples
The following example configures the IPv4 source address as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match ipv4 source address
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match ipv4 ttl
match ipv4 ttl
To configure the IPv4 time-to-live (TTL) field as a key field for a flow record, use the match ipv4 ttl command
in flow record configuration mode. To disable the use of the IPv4 TTL field as a key field for a flow record,
use the no form of this command.
match ipv4 ttl
no match ipv4 ttl
Syntax Description
This command has no arguments or keywords.
Command Default
The IPv4 time-to-live (TTL) field is not configured as a key field.
Command Modes
Flow record configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match ipv4 ttl command.
Examples
The following example configures IPv4 TTL as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match ipv4 ttl
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match ipv6
match ipv6
To configure one or more of the IPv6 fields as a key field for a flow record, use the match ipv6 command in
flow record configuration mode. To disable the use of one or more of the IPv6 fields as a key field for a flow
record, use the no form of this command.
match ipv6 {destination address| hop-limit| protocol| source address| traffic-class| version}
no match ipv6 {destination address| hop-limit| protocol| source address| traffic-class| version}
Syntax Description
destination address
Configures the IPv4 destination address as a key field. For more
information see match ipv6 destination address, on page 60.
hop-limit
Configures the IPv6 hop limit as a key field. For more information see
match ipv6 hop-limit, on page 61.
protocol
Configures the IPv6 protocol as a key field.
source address
Configures the IPv4 destination address as a key field. For more
information see match ipv6 source address, on page 62.
traffic-class
Configures the IPv6 traffic class as a key field.
version
Configures the IPv6 version from IPv6 header as a key field.
Command Default
The IPv6 fields are not configured as a key field.
Command Modes
Flow record configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
Examples
The following example configures the IPv6 protocol field as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match ipv6 protocol
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match ipv6
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match ipv6 destination address
match ipv6 destination address
To configure the IPv6 destination address as a key field for a flow record, use the match ipv6 destination
address command in flow record configuration mode. To disable the IPv6 destination address as a key field
for a flow record, use the no form of this command.
match ipv6 destination address
no match ipv6 destination address
Syntax Description
This command has no arguments or keywords.
Command Default
The IPv6 destination address is not configured as a key field.
Command Modes
Flow record configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
To return this command to its default settings, use the no match ipv6 destination address or default match
ipv6 destination address flow record configuration command.
Examples
The following example configures the IPv6 destination address as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match ipv6 destination address
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match ipv6 hop-limit
match ipv6 hop-limit
To configure the IPv6 hop limit as a key field for a flow record, use the match ipv6 hop-limit command in
flow record configuration mode. To disable the use of a section of an IPv6 packet as a key field for a flow
record, use the no form of this command.
match ipv6 hop-limit
no match ipv6 hop-limit
Syntax Description
This command has no arguments or keywords.
Command Default
The use of the IPv6 hop limit as a key field for a user-defined flow record is not enabled by default.
Command Modes
Flow record configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
Examples
The following example configures the hop limit of the packets in the flow as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match ipv6 hop-limit
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match ipv6 source address
match ipv6 source address
To configure the IPv6 source address as a key field for a flow record, use the match ipv6 source address
command in flow record configuration mode. To disable the use of the IPv6 source address as a key field for
a flow record, use the no form of this command.
match ipv6 source address
no match ipv6 source address
Syntax Description
This command has no arguments or keywords.
Command Default
The IPv6 source address is not configured as a key field.
Command Modes
Flow record configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
To return this command to its default settings, use the no match ipv6 source address or default match ipv6
source address flow record configuration command.
Examples
The following example configures a IPv6 source address as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match ipv6 source address
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match transport
match transport
To configure one or more of the transport fields as a key field for a flow record, use the match transport
command in flow record configuration mode. To disable the use of one or more of the transport fields as a
key field for a flow record, use the no form of this command.
match transport {destination-port| icmp ipv4| icmp ipv6| igmp type| source-port}
no match transport {destination-port| icmp ipv4| icmp ipv6| igmp type| source-port}
Syntax Description
destination-port
Configures the transport destination port as a key field.
icmp ipv4
Configures the ICMP IPv4 type field and the code field as key fields. For
more information see, match transport icmp ipv4, on page 65.
icmp ipv6
Configures the ICMP IPv6 type field and the code field as key fields. For
more information see, match transport icmp ipv6, on page 66.
igmp type
Configures time stamps based on the system uptime as a key field.
source-port
Configures the transport source port as a key field.
Command Default
The transport fields are not configured as a key field.
Command Modes
Flow record configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
Examples
The following example configures the destination port as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match transport destination-port
The following example configures the source port as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match transport source-port
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match transport
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match transport icmp ipv4
match transport icmp ipv4
To configure the ICMP IPv4 type field and the code field as key fields for a flow record, use the match
transport icmp ipv4 command in flow record configuration mode. To disable the use of the ICMP IPv4 type
field and code field as key fields for a flow record, use the no form of this command.
match transport icmp ipv4 {code| type}
no match transport icmp ipv4 {code| type}
Syntax Description
code
Configures the IPv4 ICMP code as a key field.
type
Configures the IPv4 ICMP type as a key field.
Command Default
The ICMP IPv4 type field and the code field are not configured as key fields.
Command Modes
Flow record configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
Examples
The following example configures the IPv4 ICMP code field as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match transport icmp ipv4 code
The following example configures the IPv4 ICMP type field as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match transport icmp ipv4 type
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match transport icmp ipv6
match transport icmp ipv6
To configure the ICMP IPv6 type field and the code field as key fields for a flow record, use the match
transport icmp ipv6 command in flow record configuration mode. To disable the use of the ICMP IPv6 type
field and code field as key fields for a flow record, use the no form of this command.
match transport icmp ipv6 {code| type}
no match transport icmp ipv6 {code| type}
Syntax Description
code
Configures the IPv6 ICMP code as a key field.
type
Configures the IPv6 ICMP type as a key field.
Command Default
The ICMP IPv6 type field and the code field are not configured as key fields.
Command Modes
Flow record configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
A flow record requires at least one key field before it can be used in a flow monitor. The key fields distinguish
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
Examples
The following example configures the IPv6 ICMP code field as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match transport icmp ipv6 code
The following example configures the IPv6 ICMP type field as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match transport icmp ipv6 type
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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match wireless ssid (wireless)
match wireless ssid (wireless)
To configure the SSID of the wireless network as a key field for a flow record, use the match wireless ssid
command in flow record configuration mode. To disable the use of the SSID of the wireless network as a key
field for a flow record, use the no form of this command
match wireless ssid
no match wireless ssid
Syntax Description
This command has no arguments or keywords.
Command Default
The SSID of the wireless network is not configured as a key field.
Command Modes
Flow record configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
A flow record requires at least one key field before it can be used in a flow monitor. The key fields differentiate
flows, with each flow having a unique set of values for the key fields. The key fields are defined using the
match command.
Examples
The following example configures the SSID of the wireless network as a key field:
Switch(config)# flow record FLOW-RECORD-1
Switch(config-flow-record)# match wireless ssid
Related Commands
Command
Description
flow record
Creates a Flexible NetFlow flow record, or modifies an existing Flexible NetFlow
flow record, and enters Flexible NetFlow flow record configuration mode.
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mode random 1 out-of
mode random 1 out-of
To enable random sampling and to specify the packet interval for a Flexible NetFlow sampler, use the mode
random 1 out-of command in sampler configuration mode. To remove the packet interval information for a
Flexible NetFlow sampler, use the no form of this command.
mode random 1 out-of window-size
no mode
Syntax Description
window-size
Specifies the window size from which to select packets. The range is 2 to
1024.
Command Default
The mode and the packet interval for a sampler are not configured.
Command Modes
Sampler configuration
Command History
Usage Guidelines
Note
Examples
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
A total of four unique samplers are supported on the switch. Packets are chosen in a manner that should
eliminate any bias from traffic patterns and counter any attempt by users to avoid monitoring.
The deterministic keyword is not supported, even though it is visible in the command-line help string.
The following example enables random sampling with a window size of 1000:
Switch(config)# sampler SAMPLER-1
Switch(config-sampler)# mode random 1 out-of 1000
Related Commands
Command
Description
debug sampler
Enables debugging output for Flexible NetFlow samplers.
show sampler
Displays the status and statistics for a Flexible NetFlow sampler.
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option
option
To configure optional data parameters for a flow exporter for Flexible NetFlow, use the option command in
flow exporter configuration mode. To remove optional data parameters for a flow exporter, use the no form
of this command.
option {application-table| exporter-stats| interface-table| sampler-table| usermac-table} [timeout seconds]
no option {application-table| exporter-stats| interface-table| sampler-table| usermac-table}
Syntax Description
Configures the application table option for flow exporters.
application-table
This keyword is specific to the AVC feature. For more information,
see the System Management Configuration Guide, Cisco IOS XE
Release 3SE.
exporter-stats
Configures the exporter statistics option for flow exporters.
interface-table
Configures the interface table option for flow exporters.
sampler-table
Configures the export sampler table option for flow exporters.
usermac-table
(Optional) Configures the wireless usermac to username table option.
timeout seconds
(Optional) Configures the option resend time in seconds for flow
exporters. The range is 1 to 86400. The default is 600.
Command Default
The timeout is 600 seconds. All other optional data parameters are not configured.
Command Modes
Flow exporter configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The option application-table command causes the periodic sending of an options table, which will allow the
collector to map the Network Based Application Recognition (NBAR) application IDs provided in the flow
records to application names. The optional timeout can alter the frequency at which the reports are sent. This
keyword is specific to the AVC feature. For more information, see the System Management Configuration
Guide, Cisco IOS XE Release 3SE.
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option
The option exporter-stats command causes the periodic sending of the exporter statistics, including the
number of records, bytes, and packets sent. This command allows the collector to estimate packet loss for the
export records it receives. The optional timeout alters the frequency at which the reports are sent.
The option interface-table command causes the periodic sending of an options table, which allows the
collector to map the interface SNMP indexes provided in the flow records to interface names. The optional
timeout can alter the frequency at which the reports are sent.
The option usermac-table command causes the periodic sending of an options table, which allows the collector
to map the user names of the wireless clients provided in the flow records to their MAC address. The optional
timeout can alter the frequency at which the reports are sent.
The option sampler-table command causes the periodic sending of an options table, which details the
configuration of each sampler and allows the collector to map the sampler ID provided in any flow record to
a configuration that it can use to scale up the flow statistics. The optional timeout can alter the frequency at
which the reports are sent.
To return this command to its default settings, use the no option or default option flow exporter configuration
command.
Examples
The following example shows how to enable the periodic sending of the application option table, which allows
the collector to map the application ID to the application name:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)# option application-table
The following example shows how to enable the periodic sending of the application option table at a lower
frequency than usual, just once per day:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)# option application-table timeout 86400
The following example shows how to enable the periodic sending of the sampler option table, which allows
the collector to map the sampler ID to the sampler type and rate:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)# option sampler-table
The following example shows how to enable the periodic sending of the usermac option table, which allows
the collector to map the wireless user mac to the user name:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)# option usermac-table
The following example shows how to enable the periodic sending of the exporter statistics, including the
number of records, bytes, and packets sent:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)# option exporter-stats
The following example shows how to enable the periodic sending of an options table, which allows the
collector to map the interface SNMP indexes provided in the flow records to interface names:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)# option interface-table
Related Commands
Command
Description
flow exporter
Creates a Flexible NetFlow flow exporter, or modifies an existing Flexible
NetFlow flow exporter, and enters Flexible NetFlow flow exporter configuration
mode.
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record
record
To add a flow record for a Flexible NetFlow flow monitor, use the record command in flow monitor
configuration mode. To remove a flow record for a Flexible NetFlow flow monitor, use the no form of this
command.
record record-name
no record
Syntax Description
record-name
Name of a user-defined flow record that was previously configured.
Command Default
A flow record is not configured.
Command Modes
Flow monitor configuration
Command History
Usage Guidelines
Note
Examples
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Each flow monitor requires a record to define the contents and layout of its cache entries. The flow monitor
can use one of the wide range of predefined record formats, or advanced users may create their own record
formats.
You must use the no ip flow monitor command to remove a flow monitor from all of the interfaces to
which you have applied it before you can modify the parameters for the record command for the flow
monitor.
The following example configures the flow monitor to use FLOW-RECORD-1:
Switch(config)# flow monitor FLOW-MONITOR-1
Switch(config-flow-monitor)# record FLOW-RECORD-1
Related Commands
Command
Description
flow monitor
Creates a flow monitor, or modifies an existing flow monitor, and enters
flow monitor configuration mode.
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sampler
sampler
To create a Flexible NetFlow flow sampler, or to modify an existing Flexible NetFlow flow sampler, and to
enter Flexible NetFlow sampler configuration mode, use the sampler command in global configuration mode.
To remove a sampler, use the no form of this command.
sampler sampler-name
no sampler sampler-name
Syntax Description
sampler-name
Name of the flow sampler that is being created or modified.
Command Default
Flexible NetFlow flow samplers are not configured.
Command Modes
Global configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Flow samplers are used to reduce the load placed by Flexible NetFlow on the networking device to monitor
traffic by limiting the number of packets that are analyzed. You configure a rate of sampling that is 1 out of
a range of 2-1024 packets. Flow samplers are applied to interfaces in conjunction with a flow monitor to
implement sampled Flexible NetFlow.
To enable flow sampling, you configure the record that you want to use for traffic analysis and assign it to a
flow monitor. When you apply a flow monitor with a sampler to an interface, the sampled packets are analyzed
at the rate specified by the sampler and compared with the flow record associated with the flow monitor. If
the analyzed packets meet the criteria specified by the flow record, they are added to the flow monitor cache.
Examples
The following example creates a flow sampler name SAMPLER-1:
Switch(config)# sampler SAMPLER-1
Switch(config-sampler)#
Related Commands
Command
Description
debug sampler
Enables debugging output for Flexible NetFlow samplers.
mode
Specifies the type of sampling and the packet interval for a Flexible NetFlow
sampler.
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sampler
Command
Description
show sampler
Displays the status and statistics for a Flexible NetFlow sampler.
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show flow exporter
show flow exporter
To display flow exporter status and statistics, use the show flow exporter command in privileged EXEC
mode.
show flow exporter [broker [detail| picture]| export-ids netflow-v9| [name] exporter-name [statistics|
templates]| option application {engines| table}| statistics| templates]
Syntax Description
broker
(Optional) Displays information about the state of the broker for the Flexible
NetFlow flow exporter.
detail
(Optional) Displays detailed information about the flow exporter broker.
picture
(Optional) Displays a picture of the broker state.
export-ids netflow-v9
(Optional) Displays the NetFlow Version 9 export fields that can be exported
and their IDs.
name
(Optional) Specifies the name of a flow exporter.
exporter-name
(Optional) Name of a flow exporter that was previously configured.
statistics
(Optional) Displays statistics for all flow exporters or for the specified flow
exporter.
templates
(Optional) Displays template information for all flow exporters or for the
specified flow exporter.
option application engines
(Optional) Displays the application engines option for flow exporters.
option application table
(Optional) Displays the application table option for flow exporters.
This option is specific to the AVC feature. For more information, see the
System Management Configuration Guide, Cisco IOS XE Release 3SE.
Command Default
None
Command Modes
Privileged EXEC
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
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show flow exporter
Examples
The following example displays the status and statistics for all of the flow exporters configured on a switch:
Switch# show flow exporter
Flow Exporter FLOW-EXPORTER-1:
Description:
Exports to the datacenter
Export protocol:
NetFlow Version 9
Transport Configuration:
Destination IP address: 192.168.0.1
Source IP address:
192.168.0.2
Transport Protocol:
UDP
Destination Port:
9995
Source Port:
55864
DSCP:
0x0
TTL:
255
Output Features:
Used
This table describes the significant fields shown in the display:
Table 1: show flow exporter Field Descriptions
Field
Description
Flow Exporter
The name of the flow exporter that you configured.
Description
The description that you configured for the exporter,
or the default description User defined.
Transport Configuration
The transport configuration fields for this exporter.
Destination IP address
The IP address of the destination host.
Source IP address
The source IP address used by the exported packets.
Transport Protocol
The transport layer protocol used by the exported
packets.
Destination Port
The destination UDP port to which the exported
packets are sent.
Source Port
The source UDP port from which the exported packets
are sent.
DSCP
The differentiated services code point (DSCP) value.
TTL
The time-to-live value.
Output Features
Specifies whether the output-features command,
which causes the output features to be run on Flexible
NetFlow export packets, has been used or not.
The following example displays the status and statistics for all of the flow exporters configured on a switch:
Switch# show flow exporter name FLOW-EXPORTER-1 statistics
Flow Exporter FLOW-EXPORTER-1:
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show flow exporter
Packet send statistics (last cleared 2w6d ago):
Successfully sent:
0
Related Commands
(0 bytes)
Command
Description
clear flow exporter
Clears the statistics for a Flexible NetFlow flow exporter.
debug flow exporter
Enables debugging output for Flexible NetFlow flow exporters.
flow exporter
Creates a Flexible NetFlow flow exporter, or modifies an existing Flexible
NetFlow flow exporter, and enters Flexible NetFlow flow exporter
configuration mode.
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show flow interface
show flow interface
To display the Flexible NetFlow configuration and status for an interface, use the show flow interface
command in privileged EXEC mode.
show flow interface [type number]
Syntax Description
Command Modes
Command History
Examples
type
(Optional) The type of interface on which you want to display Flexible NetFlow
accounting configuration information.
number
(Optional) The number of the interface on which you want to display Flexible
NetFlow accounting configuration information.
Privileged EXEC
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The following example displays the Flexible NetFlow accounting configuration on Ethernet interfaces 0/0
and 0/1:
Switch# show flow interface gigabitethernet1/0/1
Interface Ethernet1/0
monitor:
FLOW-MONITOR-1
direction:
Output
traffic(ip):
on
Switch# show flow interface gigabitethernet1/0/2
Interface Ethernet0/0
monitor:
FLOW-MONITOR-1
direction:
Input
traffic(ip):
sampler SAMPLER-2#
The table below describes the significant fields shown in the display.
Table 2: show flow interface Field Descriptions
Field
Description
Interface
The interface to which the information applies.
monitor
The name of the flow monitor that is configured on
the interface.
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show flow interface
Field
Description
direction:
The direction of traffic that is being monitored by the
flow monitor.
The possible values are:
• Input—Traffic is being received by the
interface.
• Output—Traffic is being transmitted by the
interface.
traffic(ip)
Indicates if the flow monitor is in normal mode or
sampler mode.
The possible values are:
• on—The flow monitor is in normal mode.
• sampler—The flow monitor is in sampler mode
(the name of the sampler will be included in the
display).
Related Commands
Command
Description
show flow monitor
Displays the status and statistics for a Flexible NetFlow flow monitor.
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show flow monitor
show flow monitor
To display the status and statistics for a Flexible NetFlow flow monitor, use the show flow monitor command
in privileged EXEC mode.
show flow monitor [broker [detail| picture]| [name] monitor-name [cache [format {csv| record| table}]]|
provisioning| statistics]
Syntax Description
Command Modes
Command History
Usage Guidelines
broker
(Optional) Displays information about the state of the broker for the flow
monitor
detail
(Optional) Displays detailed information about the flow monitor broker.
picture
(Optional) Displays a picture of the broker state.
name
(Optional) Specifies the name of a flow monitor.
monitor-name
(Optional) Name of a flow monitor that was previously configured.
cache
(Optional) Displays the contents of the cache for the flow monitor.
format
(Optional) Specifies the use of one of the format options for formatting the
display output.
csv
(Optional) Displays the flow monitor cache contents in comma-separated
variables (CSV) format.
record
(Optional) Displays the flow monitor cache contents in record format.
table
(Optional) Displays the flow monitor cache contents in table format.
provisioning
(Optional) Displays the flow monitor provisioning information.
statistics
(Optional) Displays the statistics for the flow monitor.
Privileged EXEC
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The cache keyword uses the record format by default.
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show flow monitor
The uppercase field names in the display output of the show flowmonitor monitor-name cache command
are key fields that Flexible NetFlow uses to differentiate flows. The lowercase field names in the display
output of the show flow monitor monitor-name cache command are nonkey fields from which Flexible
NetFlow collects values as additional data for the cache.
Examples
The following example displays the status for a flow monitor:
Switch# show flow monitor FLOW-MONITOR-1
Flow Monitor FLOW-MONITOR-1:
Description:
Used for basic traffic analysis
Flow Record:
flow-record-1
Flow Exporter:
flow-exporter-1
flow-exporter-2
Cache:
Type:
normal
Status:
allocated
Size:
4096 entries / 311316 bytes
Inactive Timeout: 15 secs
Active Timeout:
1800 secs
This table describes the significant fields shown in the display.
Table 3: show flow monitor monitor-name Field Descriptions
Field
Description
Flow Monitor
Name of the flow monitor that you configured.
Description
Description that you configured or the monitor, or
the default description User defined.
Flow Record
Flow record assigned to the flow monitor.
Flow Exporter
Exporters that are assigned to the flow monitor.
Cache
Information about the cache for the flow monitor.
Type
Flow monitor cache type. The value is always normal,
as it is the only supported cache type.
Status
Status of the flow monitor cache.
The possible values are:
• allocated—The cache is allocated.
• being deleted—The cache is being deleted.
• not allocated—The cache is not allocated.
Size
Current cache size.
Inactive Timeout
Current value for the inactive timeout in seconds.
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show flow monitor
Field
Description
Active Timeout
Current value for the active timeout in seconds.
The following example displays the status, statistics, and data for the flow monitor named FLOW-MONITOR-1:
Switch# show flow monitor FLOW-MONITOR-1 cache
Cache type:
Normal (Platform cache)
Cache size:
Unknown
Current entries:
1
Flows added:
Flows aged:
- Active timeout
(
3
2
2
300 secs)
DATALINK MAC SOURCE ADDRESS INPUT:
DATALINK MAC DESTINATION ADDRESS INPUT:
IPV6 SOURCE ADDRESS:
IPV6 DESTINATION ADDRESS:
TRNS SOURCE PORT:
TRNS DESTINATION PORT:
IP VERSION:
IP PROTOCOL:
IP TOS:
IP TTL:
tcp flags:
counter bytes long:
counter packets long:
0000.0000.1000
6400.F125.59E6
2001:DB8::1
2001:DB8:1::1
1111
2222
6
6
0x05
11
0x20
132059538
1158417
This table describes the significant fields shown in the display.
Table 4: show flow monitor monitor-name cache Field Descriptions
Field
Description
Cache type
Flow monitor cache type. The value is always normal,
as it is the only supported cache type.
Cache Size
Number of entries in the cache.
Current entries
Number of entries in the cache that are in use.
Flows added
Flows added to the cache since the cache was created.
Flows aged
Flows expired from the cache since the cache was
created.
Active timeout
Current value for the active timeout in seconds.
Inactive timeout
Current value for the inactive timeout in seconds.
DATALINK MAC SOURCE ADDRESS INPUT
MAC source address of input packets.
DATALINK MAC DESTINATION ADDRESS
INPUT
MAC destination address of input packets.
IPV6 SOURCE ADDRESS
IPv6 source address.
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Field
Description
IPV6 DESTINATION ADDRESS
IPv6 destination address.
TRNS SOURCE PORT
Source port for the transport protocol.
TRNS DESTINATION PORT
Destination port for the transport protocol.
IP VERSION
IP version.
IP PROTOCOL
Protocol number.
IP TOS
IP type of service (ToS) value.
IP TTL
IP time-to-live (TTL) value.
tcp flags
Value of the TCP flags.
counter bytes
Number of bytes that have been counted.
counter packets
Number of packets that have been counted.
The following example displays the status, statistics, and data for the flow monitor named FLOW-MONITOR-1
in a table format:
Switch# show flow monitor FLOW-MONITOR-1 cache format table
Cache type:
Normal (Platform cache)
Cache size:
Unknown
Current entries:
1
Flows added:
Flows aged:
- Active timeout
(
300 secs)
3
2
2
DATALINK MAC SRC ADDR INPUT DATALINK MAC DST ADDR INPUT IPV6 SRC ADDR IPV6 DST ADDR
TRNS SRC PORT TRNS DST PORT IP VERSION IP PROT IP TOS IP TTL tcp flags bytes long
pkts long
=========================== =========================== ============= =============
============= ============= ========== ======= ====== ====== ========= ==========
=========
0000.0000.1000
6400.F125.59E6
2001:DB8::1
2001:DB8:1::1
1111
2222
6
6 0x05
11 0x20
132059538
1158417
The following example displays the status, statistics, and data for the flow monitor named
FLOW-MONITOR-IPv6 (the cache contains IPv6 data) in record format:
Switch# show flow monitor name FLOW-MONITOR-IPv6 cache format record
Cache type:
Normal (Platform cache)
Cache size:
Unknown
Current entries:
1
Flows added:
Flows aged:
- Active timeout
(
300 secs)
DATALINK MAC SOURCE ADDRESS INPUT:
DATALINK MAC DESTINATION ADDRESS INPUT:
IPV6 SOURCE ADDRESS:
IPV6 DESTINATION ADDRESS:
3
2
2
0000.0000.1000
6400.F125.59E6
2001::2
2002::2
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show flow monitor
TRNS SOURCE PORT:
TRNS DESTINATION PORT:
IP VERSION:
IP PROTOCOL:
IP TOS:
IP TTL:
tcp flags:
counter bytes long:
counter packets long:
1111
2222
6
6
0x05
11
0x20
132059538
1158417
The following example displays the status and statistics for a flow monitor:
Switch# show flow monitor FLOW-MONITOR-1 statistics
Cache type:
Normal (Platform cache)
Cache size:
Unknown
Current entries:
1
Flows added:
Flows aged:
- Active timeout
Related Commands
(
300 secs)
3
2
2
Command
Description
clear flow monitor
Clears a flow monitor cache or flow monitor statistics and forces the
export of the data in the flow monitor cache.
debug flow monitor
Enables debugging output for Flexible NetFlow flow monitors.
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Flexible NetFlow Commands
show flow record
show flow record
To display the status and statistics for a Flexible NetFlow flow record, use the show flow record command
in privileged EXEC mode.
show flow record [broker [detail| picture]| [name] record-name]
Syntax Description
broker
(Optional) Displays information about the state of the broker for the Flexible
NetFlow flow record.
detail
(Optional) Displays detailed information about the flow record broker.
picture
(Optional) Displays a picture of the broker state.
name
(Optional) Specifies the name of a flow record.
record-name
(Optional) Name of a user-defined flow record that was previously configured.
Command Default
None
Command Modes
Privileged EXEC
Command History
Examples
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The following example displays the status and statistics for FLOW-RECORD-1:
Switch# show flow record FLOW-RECORD-1
flow record FLOW-RECORD-1:
Description:
User defined
No. of users:
0
Total field space: 24 bytes
Fields:
match ipv6 destination address
match transport source-port
collect interface input
Related Commands
Command
Description
record
Configures a flow record for a Flexible NetFlow flow monitor.
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show flow record wireless avc basic (wireless)
show flow record wireless avc basic (wireless)
This command is specific to the AVC feature. To view default flow record information, use the show flow
record wireless avc basic command in privileged EXEC mode.
show flow record wireless avc basic
Command Default
None
Command Modes
Privileged EXEC
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
If a user-defined flow record has not been specified, then the default flow record wireless avc basic is mapped
to the flow monitor.
This command is specific to the AVC feature. For more information, see the System Management Configuration
Guide, Cisco IOS XE Release 3SE.
Examples
This command is specific to the AVC feature. For examples, see the System Management Configuration
Guide, Cisco IOS XE Release 3SE.
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Flexible NetFlow Commands
show sampler
show sampler
To display the status and statistics for a Flexible NetFlow sampler, use the show sampler command in
privileged EXEC mode.
show sampler [broker [detail| picture]| [name] sampler-name]
Syntax Description
broker
(Optional) Displays information about the state of the broker for the Flexible
NetFlow sampler.
detail
(Optional) Displays detailed information about the sampler broker.
picture
(Optional) Displays a picture of the broker state.
name
(Optional) Specifies the name of a sampler.
sampler-name
(Optional) Name of a sampler that was previously configured.
Command Default
None
Command Modes
Privileged EXEC
Command History
Examples
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The following example displays the status and statistics for all of the flow samplers configured:
Switch# show sampler
Sampler SAMPLER-1:
ID:
2083940135
export ID:
0
Description:
User defined
Type:
Invalid (not in use)
Rate:
1 out of 32
Samples:
0
Requests:
0
Users (0):
Sampler SAMPLER-2:
ID:
3800923489
export ID:
1
Description:
User defined
Type:
random
Rate:
1 out of 100
Samples:
1
Requests:
124
Users (1):
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show sampler
flow monitor FLOW-MONITOR-1 (datalink,vlan1)
0 out of 0
This table describes the significant fields shown in the display.
Table 5: show sampler Field Descriptions
Related Commands
Field
Description
ID
ID number of the flow sampler.
Export ID
ID of the flow sampler export.
Description
Description that you configured for the flow sampler,
or the default description User defined.
Type
Sampling mode that you configured for the flow
sampler.
Rate
Window size (for packet selection) that you
configured for the flow sampler. The range is 2 to
32768.
Samples
Number of packets sampled since the flow sampler
was configured or the switch was restarted. This is
equivalent to the number of times a positive response
was received when the sampler was queried to
determine if the traffic needed to be sampled. See the
explanation of the Requests field in this table.
Requests
Number of times the flow sampler was queried to
determine if the traffic needed to be sampled.
Users
Interfaces on which the flow sampler is configured.
Command
Description
debug sampler
Enables debugging output for Flexible NetFlow samplers.
sampler
Creates a Flexible NetFlow flow sampler, or modifies an existing Flexible
NetFlow flow sampler.
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Flexible NetFlow Commands
source
source
To configure the source IP address interface for all of the packets sent by a Flexible NetFlow flow exporter,
use the source command in flow exporter configuration mode. To remove the source IP address interface for
all of the packets sent by a Flexible NetFlow flow exporter, use the no form of this command.
source interface-type interface-number
no source
Syntax Description
interface-type
Type of interface whose IP address you want to use for the source IP address
of the packets sent by a Flexible NetFlow flow exporter.
interface-number
Interface number whose IP address you want to use for the source IP address
of the packets sent by a Flexible NetFlow flow exporter.
Command Default
The IP address of the interface over which the Flexible NetFlow datagram is transmitted is used as the source
IP address.
Command Modes
Flow exporter configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
The benefits of using a consistent IP source address for the datagrams that Flexible NetFlow sends include
the following:
• The source IP address of the datagrams exported by Flexible NetFlow is used by the destination system
to determine from which switch the Flexible NetFlow data is arriving. If your network has two or more
paths that can be used to send Flexible NetFlow datagrams from the switch to the destination system
and you do not specify the source interface from which the source IP address is to be obtained, the switch
uses the IP address of the interface over which the datagram is transmitted as the source IP address of
the datagram. In this situation the destination system might receive Flexible NetFlow datagrams from
the same switch, but with different source IP addresses. When the destination system receives Flexible
NetFlow datagrams from the same switch with different source IP addresses, the destination system
treats the Flexible NetFlow datagrams as if they were being sent from different switches. To avoid having
the destination system treat the Flexible NetFlow datagrams as if they were being sent from different
switches, you must configure the destination system to aggregate the Flexible NetFlow datagrams it
receives from all of the possible source IP addresses in the switch into a single Flexible NetFlow flow.
• If your switch has multiple interfaces that can be used to transmit datagrams to the destination system,
and you do not configure the source command, you will have to add an entry for the IP address of each
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source
interface into any access lists that you create for permitting Flexible NetFlow traffic. Creating and
maintaining access lists for permitting Flexible NetFlow traffic from known sources and blocking it
from unknown sources is easier when you limit the source IP address for Flexible NetFlow datagrams
to a single IP address for each switch that is exporting Flexible NetFlow traffic.
Caution
The interface that you configure as the source interface must have an IP address configured, and it must
be up.
Tip
When a transient outage occurs on the interface that you configured with the source command, the Flexible
NetFlow exporter reverts to the default behavior of using the IP address of the interface over which the
datagrams are being transmitted as the source IP address for the datagrams. To avoid this problem, use a
loopback interface as the source interface because loopback interfaces are not subject to the transient
outages that can occur on physical interfaces.
To return this command to its default settings, use the no source or default source flow exporter configuration
command.
Examples
The following example shows how to configure Flexible NetFlow to use a loopback interface as the source
interface for NetFlow traffic:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)# source loopback 0
Related Commands
Command
Description
flow exporter
Creates a Flexible NetFlow flow exporter, or modifies an existing Flexible
NetFlow flow exporter, and enters Flexible NetFlow flow exporter configuration
mode.
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Flexible NetFlow Commands
template data timeout
template data timeout
To specify a timeout period for resending flow exporter template data, use the template data timeout command
in flow exporter configuration mode. To remove the template resend timeout for a flow exporter, use the no
form of this command.
template data timeout seconds
no template data timeout seconds
Syntax Description
seconds
Timeout value in seconds. The range is 1 to 86400. The default is 600.
Command Default
The default template resend timeout for a flow exporter is 600 seconds.
Command Modes
Flow exporter configuration
Command History
Usage Guidelines
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Flow exporter template data describes the exported data records. Data records cannot be decoded without the
corresponding template. The template data timeout command controls how often those templates are exported.
To return this command to its default settings, use the no template data timeout or default template data
timeout flow record exporter command.
Examples
The following example configures resending templates based on a timeout of 1000 seconds:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)# template data timeout 1000
Related Commands
Command
Description
flow exporter
Creates a Flexible NetFlow flow exporter, or modifies an existing Flexible
NetFlow flow exporter, and enters Flexible NetFlow flow exporter configuration
mode.
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transport
transport
To configure the transport protocol for a flow exporter for Flexible NetFlow, use the transport command in
flow exporter configuration mode. To remove the transport protocol for a flow exporter, use the no form of
this command.
transport udp udp-port
no transport udp udp-port
Syntax Description
udp udp-port
Specifies User Datagram Protocol (UDP) as the transport protocol and the
UDP port number.
Command Default
Flow exporters use UDP on port 9995.
Command Modes
Flow exporter configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
To return this command to its default settings, use the no transport or default transport flow exporter
configuration command.
Examples
The following example configures UDP as the transport protocol and a UDP port number of 250:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)# transport udp 250
Related Commands
Command
Description
flow exporter
Creates a Flexible NetFlow flow exporter, or modifies an existing Flexible
NetFlow flow exporter, and enters Flexible NetFlow flow exporter configuration
mode.
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ttl
ttl
To configure the time-to-live (TTL) value, use the ttl command in flow exporter configuration mode. To
remove the TTL value, use the no form of this command.
ttl ttl
no ttl ttl
Syntax Description
ttl
Time-to-live (TTL) value for exported datagrams. The range is 1 to 255. The default is
255.
Command Default
Flow exporters use a TTL of 255.
Command Modes
Flow exporter configuration
Command History
Release
Modification
Cisco IOS XE 3.3SE
This command was introduced.
Usage Guidelines
To return this command to its default settings, use the no ttl or default ttl flow exporter configuration command.
Examples
The following example specifies a TTL of 15:
Switch(config)# flow exporter FLOW-EXPORTER-1
Switch(config-flow-exporter)# ttl 15
Related Commands
Command
Description
flow exporter
Creates a Flexible NetFlow flow exporter, or modifies an existing Flexible
NetFlow flow exporter, and enters Flexible NetFlow flow exporter configuration
mode.
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