Cisco Catalyst 3750-X and 3560-X Series Switches FAQ

Cisco Catalyst 3750-X and 3560-X Series Switches FAQ
Q&A
Cisco Catalyst 3750-X and 3560-X Series Switches
Q. What are the Cisco Catalyst 3750-X and 3560-X Series Switches?
A.
The Cisco® stackable Catalyst® 3750-X and standalone 3560-X Series Switches are enterprise-class wiring
closet switches that facilitate the deployment of highly secure converged applications while maximizing
investment protection for evolving network and application requirements. Combining 10/100/1000 and Power
over Ethernet Plus (PoE+) or GE SFP configurations with four optional uplinks, the Cisco Catalyst 3750-X and
3560-X Series Switches enhance worker productivity by enabling applications such as encryption, IP
telephony, wireless, and video.
The Cisco Catalyst 3750-X and 3560-X Series Switches are built on the existing Cisco Catalyst 3750-E and
3560-E Series Switches, using the same port application-specific integrated circuit (ASIC), switch fabric, and
Cisco IOS® Software feature sets.
Q. What is new in the Cisco Catalyst 3750-X and 3560-X Series Switches?
A.
The Cisco Catalyst X-Series switches build on the E-Series switches and add the following features:
●
Cisco StackPower™ technology, available only on the Cisco Catalyst 3750-X, manages power very
efficiently by aggregating and sharing power supplies across a stack of switches. It also supports a feature
known as Zero-Footprint RPS.
●
Four field-replaceable network modules that provide 4 x 1 Gigabit and 2 x 10 Gigabit uplink interfaces for
the switch.
●
Full 802.3at PoE+ support provides 30W per port on all 48 ports in a single rack unit (RU) switch.
●
New LAN Base feature set offers comprehensive Layer 2 functionality.
●
Dual redundant power supplies and fans: Four high-efficiency power supply options are available, including
a DC power supply for PoE applications. Two redundant, field-replaceable fan modules are also included.
●
MACsec provides hardware-based encryption (802.1ae) at line rate on all 48 ports (requires IP Base).
Includes MACsec Key Agreement (MKA) (included in Dot1X-rev).
●
Open Shortest Path First (OSPF) for routed access in IP Base image.
Q. What Cisco IOS Software feature set do the Cisco Catalyst 3750-X and 3560-X Series Switches support?
A.
The Cisco Catalyst 3750-X and 3560-X Series Switches come with a universal image and support the
standard IP Base and IP Services feature sets, in addition to the new LAN Base feature set. The GE SFP
switch models are available with either IP Base or IP Services feature set.
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Page 1 of 22
Q. What is the difference between the Cisco IOS Software feature sets?
A.
Table 1 shows the differences between Cisco IOS Software Feature Sets.
Table 1.
Cisco IOS Software Feature Set Differences
Functions
LAN Base
IP Base
IP Services
Layer 2+
Enterprise access Layer 2
Complete Access Layer 2
Wide range of Layer 2 access features for
enterprise deployments
Supports all Cisco Catalyst 2000 and Cisco Catalyst 3000 Layer 2 features,
including hot standby protocols;
Supports Cisco StackPower™ technology (Cisco
Catalyst 3750-X). Please note that for LAN Base
Cisco StackPower is only supported starting
15.0.(2)SE software release and the cables need
to be purchased separately
Layer 3
Static IP routing support
Enterprise access Layer 3
Complete access Layer 3
Support for SVI
RIP, static and stub PIM, and EIGRP stub
OSPF for routed access
OSPF, EIGRP, BGP, IS-IS
Enterprise access Layer 3
Complete access Layer 3
Manageability Basic manageability
Security
QoS
VRF-lite, WCCP, and PBR
Support for a wide range of MIBs, IPSLA
Responder, and RSPAN
EEM, Gold-Lite and Smart Install Director
Enterprise access security
Complete access security
DHCP Snooping, IPSG, DAI, PACLs, Cisco
Identity 4.0, NAC and 802.1x features
Router and VLAN ACLs, private VLANs, complete identity and security,
Cisco TrustSec® SXP, and IEEE 802.1AE (Cisco Catalyst 3560-X and
Cisco Catalyst 3750-X)
Enterprise access QoS
Complete access QoS
Ingress policing, Trust Boundary, AutoQoS, and
DSCP mapping
Support for all Cisco Catalyst 2000 and Cisco Catalyst 3000 QoS features,
including per-VLAN policies
Q. What Cisco Catalyst 3750-X and 3560-X Series models are available?
A.
Table 2 shows the SKUs that have been created for the LAN Base and IP Base and IP Services models. All
switch models are shipped from the factory with the proper feature set license installed.
Table 2.
Cisco Catalyst 3750-X and 3560-X Series Models
Switch Type
Feature Set
Models
Port Type and Density
Default Power Supply
Stackable
LAN Base
WS-C3750X-24T-L
24 Ethernet 10/100/1000
ports
350W AC
WS-C3750X-48T-L
48 Ethernet 10/100/1000
ports
WS-C3750X-24P-L
24 Ethernet 10/100/1000
PoE+ ports
WS-C3750X-48P-L
48 Ethernet 10/100/1000
PoE+ ports
WS-C3750X-48PF-L
48 Ethernet 10/100/1000
PoE+ ports
1100W AC
WS-C3750X-24T-S
24 Ethernet 10/100/1000
ports
350W AC
WS-C3750X-48T-S
48 Ethernet 10/100/1000
ports
WS-C3750X-12S-S
12 GE SFP Ethernet ports
WS-C3750X-24S-S
24 GE SFP Ethernet ports
WS-C3750X-24P-S
24 Ethernet 10/100/1000
PoE+ ports
WS-C3750X-48P-S
48 Ethernet 10/100/1000
PoE+ ports
WS-C3750X-48PF-S
48 Ethernet 10/100/1000
PoE+ ports
IP Base
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
715W AC
715W AC
1100W AC
Page 2 of 22
Switch Type
Standalone
Feature Set
Models
Port Type and Density
Default Power Supply
IP Services
WS-C3750X-24T-E
24 Ethernet 10/100/1000
ports
350W AC
WS-C3750X-48T-E
48 Ethernet 10/100/1000
ports
WS-C3750X-24P-E
24 Ethernet 10/100/1000
PoE+ ports
WS-C3750X-48P-E
48 Ethernet 10/100/1000
PoE+ ports
WS-C3750X-48PF-E
48 Ethernet 10/100/1000
PoE+ ports
1100W AC
WS-C3750X-12S-E
12 GE SFP Ethernet ports
350W AC
WS-C3750X-24S-E
24 GE SFP Ethernet
WS-C3560X-24T-L
24 Ethernet 10/100/1000
ports
WS-C3560X-48T-L
48 Ethernet 10/100/1000
ports
WS-C3560X-24P-L
24 Ethernet 10/100/1000
PoE+ ports
WS-C3560X-48P-L
48 Ethernet 10/100/1000
PoE+ ports
WS-C3560X-48PF-L
48 Ethernet 10/100/1000
PoE+ ports
1100W AC
WS-C3560X-24T-S
24 Ethernet 10/100/1000
ports
350W AC
WS-C3560X-48T-S
48 Ethernet 10/100/1000
ports
WS-C3560X-24P-S
24 Ethernet 10/100/1000
PoE+ ports
WS-C3560X-48P-S
48 Ethernet 10/100/1000
PoE+ ports
WS-C3560X-48PF-S
48 Ethernet 10/100/1000
PoE+ ports
1100W AC
WS-C3560X-24T-E
24 Ethernet 10/100/1000
ports
350W AC
WS-C3560X-48T-E
48 Ethernet 10/100/1000
ports
WS-C3560X-24P-E
24 Ethernet 10/100/1000
PoE+ ports
WS-C3560X-48P-E
48 Ethernet 10/100/1000
PoE+ ports
WS-C3560X-48PF-E
48 Ethernet 10/100/1000
PoE+ ports
LAN Base
IP Base
IP Services
715W AC
350W AC
715W AC
715W AC
715W AC
1100W AC
Q. What is the difference between the Cisco Catalyst 3750-X and 3560-X Series LAN Base and IP Base models?
A.
The LAN Base feature set enables comprehensive Layer 2 functionality and supports Cisco StackPower,
(available only on the Catalyst 3750-X), while the IP Base feature set provides more advanced features such
as MACsec, protocol-independent multicast (PIM) stub, Enhanced Interior Gateway Routing Protocol (EIGRP)
stub, and full Open Shortest Path First (OSPF) routing. Please note that for LAN Base Cisco StackPower is
only supported starting 15.0.(2)SE software release and the cables need to be purchased separately.
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 3 of 22
Q. Is static IP routing supported in the LAN Base feature set?
A.
Yes. LAN Base supports static IP routing.
Q. Does the LAN Base feature set support Cisco StackPower technology on the Cisco Catalyst 3750-X Series
Switches?
A.
Yes. Cisco StackPower is supported on LAN Base. Please note that for LAN Base Cisco StackPower is only
supported starting 15.0.(2)SE software release and the cables need to be purchased separately.
Q. Does the LAN Base feature set support MACsec on the Cisco Catalyst 3750-X and 3560-X Series Switches?
A.
No. IP Base is the minimum required to support MACsec.
Q. Are mixed stacks supported?
A.
It depends. The Cisco StackWise and StackWise Plus solutions are flexible enough to allow you to:
●
Stack any Cisco Catalyst 3750 switch in the same stack (hardware mixed stack)
●
Stack any Cisco IOS Software feature set in the same stack (software mixed stack)
One exception is the new LAN Base models being introduced with the Cisco Catalyst 3750-X Series, which
can stack only with other Catalyst 3750-X LAN Base models.
Q. Can a Cisco Catalyst 3750-X Series Switch with LAN Base software be used in any Cisco Catalyst 3750
stack?
A.
No. LAN Base models can stack only with other LAN Base models.
Q. Can a Cisco Catalyst 3750-X LAN Base switch be upgraded to IP Base and stacked with any Cisco Catalyst
3000 switch?
A.
Yes. Once a Cisco Catalyst 3750-X LAN Base switch is upgraded to IP Base or IP Services, it can be stacked
with any non-LAN Base switch or stack.
Q. Can a Cisco Catalyst 3750-X SFP IP Base switch be upgraded to IP Services?
A.
Yes. A Cisco Catalyst 3750-X SFP IP Base switch can be upgraded to IP Services.
Q. Are X2 modules supported on the Cisco Catalyst 3750-X and 3560-X Series Switches?
A.
No. These new switches support Small Form-Factor Pluggable (SFP) and SFP+ modules only.
Q. Do the Cisco Catalyst 3750-X and 3560-X Series Switches support Cisco EnergyWise?
A.
Yes. EnergyWise is a Cisco solution for power management across an entire enterprise, which enables the
network to control, report, and monitor the power use.
The Cisco Catalyst 3750-X and 3560-X Series Switches have instrumentation built in for enhanced
EnergyWise support. The power supplies, along with the system board, have the instrumentation to monitor
and report detailed power characteristics from the system, such as input/output power, voltage, and current.
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 4 of 22
Q. How do the Cisco Catalyst 3750-X and 3560-X Series Switches compare to the rest of the Cisco Catalyst 3000
switches?
A.
Table 3 shows a comparison of the various Cisco Catalyst 3750 and 3560 switch models.
Table 3.
Comparison of the Cisco Catalyst 3750 and 3560 Switches
Feature
Cisco Catalyst 3750-X and 3560-X
Cisco Catalyst 3750-E and 3560-E
Cisco Catalyst 3750G and 3560G
FRU Network Module
Yes
No
No
Redundant PS
Yes
No
No
FRU Power Supplies
Yes, Dual PS
Yes
No
Encryption
Yes (Downlink)
No
No
PoE+ 30W/port
Yes
No
No
Management Options
Console RJ45, USB console, and Out
of band Ethernet
Console RJ45, and Out of band
Ethernet
Console RJ45
StackPower
Yes (only on 3750-X)
No
No
RPS/XPS
XPS
RPS
RPS
Zero-Footprint RPS
Yes
No
No
EnergyWise
Monitor, report actual power use
System & PoE
Monitor actual power use
Monitor budgeted power
Switch Architecture
This section addresses how the X-Series switches differ from the E-Series switches.
Q. What are the differences between the Cisco Catalyst 3750-X and 3560-X and the rest of the Cisco Catalyst
3000 switches?
A.
The Cisco Catalyst 3750-X and 3560-X are line rate nonblocking switches that are identical to the Cisco
Catalyst 3750-E and 3560-E Series with the following added features:
●
Cisco StackPower technology: Aggregates and shares power supplies in a stack and supports a zerofootprint redundant power supply. Available only on the Catalyst 3750-X.
●
Network modules: Field-replaceable uplink, 1 Gigabit and 10 Gigabit versions.
●
Full 802.3at PoE+: Supports 30W per port on all 48 ports in a single RU switch.
●
Three software feature sets: LAN Base, IP Base, and IP Services.
●
Dual redundant power supplies and fans: Four power supply options, including a DC power supply for PoE.
●
MACsec: Hardware-based encryption (802.1ae). Includes MACsec Key Agreement (MKA) (included in
Dot1X-rev).
Q. What management ports are available?
A.
The Cisco Catalyst 3750-X and 3560-X Series provide two types of console ports and one OOB Ethernet port:
●
USB Type B console port
●
Standard RJ-45 serial port
●
10/100 Ethernet management port
Q. Can both console ports be used simultaneously?
A.
No. When the USB console is used, the RJ-45 console receives the output of the USB console as well. This
design allows the administrator to see when the USB console port is in use. This capability is useful for remote
administrators.
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Page 5 of 22
Q. Does the switch support auto-baud on the console port?
A.
No. This was a tradeoff between console speed sensing and the ability to use the USB console.
Q. Which management port has priority?
A.
The RJ-45 console port is always the default management port, but when a PC is connected to the USB
console port, the USB console takes over. The RJ-45 port continues to receive the output (a copy) of
everything that gets displayed on the USB console port. This capability allows remote administrators to
continue monitoring or logging the output showing what is happening at the switch location, sending it to a
storage device.
Q. When a PC is left unattended on the USB console port, would remote administrators get locked out from the
RJ-45 management port?
A.
The USB console port has a default activity timer that can also be programmed by the user. This activity timer
will expire and return control to the RJ-45 management port to avoid locking the remote administrator out.
Q. What can I do with the USB Type A port in the back of the Cisco Catalyst 3750-X and 3560-X Series?
A.
It is additional storage. This USB port can be used to perform software upgrades, store configurations, and
even write memory core dumps for troubleshooting purposes. All Cisco USB memory drives can be used
(currently up to 1-GB USB drives are available).
Q. What USB flash types can be used on the Cisco Catalyst 3750-X and 3560-X Series Switches?
A.
All available Cisco USB flash memory devices can be used. Table 4 lists the available devices.
Table 4.
Cisco USB Flash Memory Devices
Product ID
Description
MEMUSB-64FT
64MB USB Flash Token
MEMUSB-128FT
128MB USB Flash Token
MEMUSB-256FT
256MB USB Flash Token
MEMUSB-1024FT
1GV USB Flash Token
Q. Can uplink port types be combined in a Cisco Catalyst 3750-X and 3560-X Series Switch or stack?
A.
Yes. The Cisco Catalyst 3750-X Series and 3560-X Series Switches support four optional network modules for
uplink ports. The default switch configuration doesn't include the uplink module.
The four network modules can be used in any of the combinations shown in Table 5.
Table 5.
Uplink Ports on the 10 Gigabit Network Module
Interface Options
Network Module
10GbE SFP+ Ports
GbE SFP Ports
1GbE
0
4
10GbE Network Module
2
0
0
4
1
2
10GB-T
2 (RJ-45)
0
Service Module
2
0
1
1
0
2
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Page 6 of 22
Either one of these network modules can be installed via online insertion and removal (OIR) in any of these
new switches.
In a stack of Cisco Catalyst 3750-X switches, each switch in the stack can deploy any of the network modules
or no network module at all.
Q. Do the Cisco Catalyst 3750-X and 3560-X Series Switches have feature parity with the existing Cisco Catalyst
3000 switches?
A.
Yes. The Cisco Catalyst 3750-X and 3560-X Series have all the features of the Cisco Catalyst 3750-E and
3560-E series respectively, and will have feature parity with existing respective Cisco Catalyst 3000 switches.
All Cisco Catalyst 3000 switches run the same Cisco IOS Software train, which provides maximum
compatibility.
Q. What is the performance of the Cisco Catalyst 3750-X and 3560-X Series Switches?
A.
The Cisco Catalyst 3750-X and 3560-X Series have a nonblocking switching architecture capable of
forwarding traffic for all 48 1 Gigabit ports plus 2 10 Gigabit ports at line rate. See the datasheet for the MPPS
information for each model.
Q. Do the Cisco Catalyst 3750-X and 3560-X Series Switches consume less power than the Cisco Catalyst ESeries switches?
A.
The Cisco Catalyst 3750-X and 3560-X Series are based on the same building blocks as the E-Series
switches, in terms of port ASIC, switch fabric, and most components. However, these switches have a new
thermal design, new highly efficient power supplies, and new efficient fans, which use less power. At the same
time, newer components have added new capabilities that require additional power; therefore, the savings in
power consumption were used to power the new capabilities. The Cisco Catalyst 3750-X and 3560-X Series
consume the same power as the Cisco Catalyst 3750-E and 3560-E Series and provide more functionality.
Q. Do the Cisco Catalyst 3750-X and 3560-X Series Switches support front to back airflow?
A.
The airflow on the Cisco Catalyst 3750-X and 3560-X Series is "front and sides" to back airflow.
Q. Is the airflow reversible in the Cisco Catalyst 3750-X and 3560-X Series Switches?
A.
No. The airflow is not reversible.
Q. Can the Cisco Catalyst 3750-X and 3560-X Series Switches run with only one fan module?
A.
Yes. The Cisco Catalyst 3750-X and 3560-X Series have two fan modules that are serviceable from the back
of the switch. The switches' thermal design requires the air volume of three fans (each fan module has two
fans inside) for the worst case scenario; hence, removing one fan module puts the switch at risk of
overheating. Nonetheless, the fan module can be serviced provided that the switch does not run for long
periods of time under extreme conditions with a single fan module.
Q. Do I need two power supplies to run a Cisco Catalyst 3750-X or 3560-X Series Switch?
A.
No. The Cisco Catalyst 3750-X and 3560-X Series Switches support two field-replaceable power supplies to
provide redundancy. The second power supply might be required in cases in which deployment of full PoE+ on
all 48 ports is needed. Four power supply options are available for use in the Cisco Catalyst 3750-X and 3560X Series, as shown in Table 6.
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 7 of 22
Table 6.
Power Supply Options for the Cisco Catalyst 3750-X and 3560-X Series Switches
Product ID
Description
C3KX-PWR-350WAC
350W AC power supply
C3KX-PWR-715WAC
715W AC power supply
C3KX-PWR-1100WAC
1100W AC power supply
C3KX-PWR-440WDC
440W DC power supply
Q. What SFP+ transceivers are supported?
A.
Table 7 shows the SFP+ transceivers supported by Cisco Catalyst 3750-X and 3560-X Series Switches.
Table 7.
Supported SFP+ Transceivers for Cisco Catalyst 3750-X and 3560-X Series Switches
SFP+ Transceivers for Cisco Catalyst 3750-X and 3560-X Series
Product ID
Description
SFP-10G-LR=
10GBASE-LR SFP+ module
SFP-10G-SR=
10GBASE-SR SFP+ module
SFP-10G-LRM=
10GBASE-LRM SFP+ module
SFP-H10GB-CU1M=
10GBASE-CX1 SFP module
SFP-H10GB-CU3M=
10GBASE-CX3 SFP module
SFP-H10GB-CU5M=
10GBASE-CX5 SFP module
Q. What SFP transceivers are supported?
A.
See datasheet for full list. Table 8 shows the SFP transceivers supported by Cisco Catalyst 3750-X and 3560X Series Switches. Please refer to the following URL for a full list of supported SFP:
http://www.cisco.com/en/US/products/hw/modules/ps5455/products_device_support_tables_list.html
Table 8.
Supported SFP Transceivers for Cisco Catalyst 3750-X and 3560-X Series Switches
SFP Transceivers for Cisco Catalyst 3750-X and 3560-X Series
Product ID
Description
GLC-GE-100FX=
100BASE-FX SFP on Gigabit Ethernet SFP ports for LAN switches1
GLC-LH-SM=
Gigabit Ethernet SFP, LC connector LX/LH transceiver
GLC-SX-MM=
Gigabit Ethernet SFP, LC connector SX transceiver
GLC-T=
1000BASE-T SFP transceiver module for copper connections
GLC-ZX-SM=
1000BASE-ZX SFP
GLC-BX-D=
1000BASE-BX SFP, 1490 nm
GLC-BX-U=
1000BASE-BX SFP, 1310 nm
CWDM-SFP-1470=
Coarse wavelength-division multiplexing (CWDM) 1470 nm SFP Gigabit Ethernet and 1G/2G
Fibre Channel (FC)
CWDM-SFP-1490=
CWDM 1490 nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1510=
CWDM 1510 nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1530=
CWDM 1530 nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1550=
CWDM 1550 nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1570=
CWDM 1570 nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1590=
CWDM 1590 nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1610=
CWDM 1610 nm SFP Gigabit Ethernet and 1G/2G FC
SFP-GE-S=
1000BASE-SX SFP module for MMF, 850 nm (DOM)2
SFP-GE-L=
1000BASE-LX/LH SFP module for SMF, 1300 nm (DOM)2
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 8 of 22
SFP Transceivers for Cisco Catalyst 3750-X and 3560-X Series
DWDM-SFP-3033=
Dense wavelength-division multiplexing (DWDM) SFP 1530.33 nm SFP (100 GHz ITU grid)
DWDM-SFP-3112=
DWDM SFP 1531.12 nm SFP (100 GHz ITU grid)
DWDM-SFP-3190=
DWDM SFP 1531.90 nm SFP (100 GHz ITU grid)
DWDM-SFP-3268=
DWDM SFP 1532.68 nm SFP (100 GHz ITU grid)
DWDM-SFP-3346=
DWDM SFP 1533.47 nm SFP (100 GHz ITU grid)
DWDM-SFP-3425=
DWDM SFP 1534.25 nm SFP (100 GHz ITU grid)
DWDM-SFP-3504=
DWDM SFP 1535.04 nm SFP (100 GHz ITU grid)
DWDM-SFP-3582=
DWDM SFP 1535.82 nm SFP (100 GHz ITU grid)
DWDM-SFP-3661=
DWDM SFP 1536.61 nm SFP (100 GHz ITU grid)
DWDM-SFP-3739=
DWDM SFP 1537.40 nm SFP (100 GHz ITU grid)
DWDM-SFP-3819=
DWDM SFP 1538.19 nm SFP (100 GHz ITU grid)
DWDM-SFP-3898=
DWDM SFP 1538.98 nm SFP (100 GHz ITU grid)
DWDM-SFP-3977=
DWDM SFP 1539.77 nm SFP (100 GHz ITU grid)
DWDM-SFP-4056=
DWDM SFP 1540.56 nm SFP (100 GHz ITU grid)
DWDM-SFP-4134=
DWDM SFP 1541.35 nm SFP (100 GHz ITU grid)
DWDM-SFP-4214=
DWDM SFP 1542.14 nm SFP (100 GHz ITU grid)
DWDM-SFP-4294=
DWDM SFP 1542.94 nm SFP (100 GHz ITU grid)
DWDM-SFP-4373=
DWDM SFP 1543.73 nm SFP (100 GHz ITU grid)
DWDM-SFP-4453=
DWDM SFP 1544.53 nm SFP (100 GHz ITU grid)
DWDM-SFP-4532=
DWDM SFP 1545.32 nm SFP (100 GHz ITU grid)
DWDM-SFP-4612=
DWDM SFP 1546.12 nm SFP (100 GHz ITU grid)
DWDM-SFP-4692=
DWDM SFP 1546.92 nm SFP (100 GHz ITU grid)
DWDM-SFP-4772=
DWDM SFP 1547.72 nm SFP (100 GHz ITU grid)
DWDM-SFP-4851=
DWDM SFP 1548.51 nm SFP (100 GHz ITU grid)
DWDM-SFP-4931=
DWDM SFP 1549.32 nm SFP (100 GHz ITU grid)
DWDM-SFP-5012=
DWDM SFP 1550.12 nm SFP (100 GHz ITU grid)
DWDM-SFP-5092=
DWDM SFP 1550.92 nm SFP (100 GHz ITU grid)
DWDM-SFP-5172=
DWDM SFP 1551.72 nm SFP (100 GHz ITU grid)
DWDM-SFP-5252=
DWDM SFP 1552.52 nm SFP (100 GHz ITU grid)
DWDM-SFP-5332=
DWDM SFP 1553.33 nm SFP (100 GHz ITU grid)
DWDM-SFP-5413=
DWDM SFP 1554.13 nm SFP (100 GHz ITU grid)
DWDM-SFP-5494=
DWDM SFP 1554.94 nm SFP (100 GHz ITU grid)
DWDM-SFP-5575=
DWDM SFP 1555.75 nm SFP (100 GHz ITU grid)
DWDM-SFP-5655=
DWDM SFP 1556.55 nm SFP (100 GHz ITU grid)
DWDM-SFP-5736=
DWDM SFP 1557.36 nm SFP (100 GHz ITU grid)
DWDM-SFP-5817=
DWDM SFP 1558.17 nm SFP (100 GHz ITU grid)
DWDM-SFP-5898=
DWDM SFP 1558.98 nm SFP (100 GHz ITU grid)
DWDM-SFP-5979=
DWDM SFP 1559.79 nm SFP (100 GHz ITU grid)
DWDM-SFP-6061=
DWDM SFP 1560.61 nm SFP (100 GHz ITU grid)
DWDM-SFP-6141=
DWDM SFP 1561.42 nm SFP (100 GHz ITU grid)
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 9 of 22
Q. Is local switching supported on the Cisco Catalyst 3750-X and 3560-X Series Switches?
A.
Yes, local switching is performed only on the Cisco Catalyst 3750-X and 3560-X Series and E-Series switches.
Even if there is a mixed hardware stack of X-Series and E-Series switches with classic Cisco Catalyst 3750
switches, the X-Series switches can still support local switching.
Cisco StackPower and StackWise Plus
This section explains the workings of the Cisco StackPower and StackWise Plus technologies. In addition, it
compares StackWise and StackWise Plus. The Cisco Catalyst 3750-X and 3750-E Series Switches run StackWise
Plus, while the Cisco Catalyst 3750v2 and 3750G switches run StackWise. None of the Cisco Catalyst 3560
switches support the Cisco StackPower, StackWise, nor StackWise Plus technologies.
Q. What is the Cisco StackWise technology?
A.
Cisco StackWise is a technology that provides an innovative method for collectively using and extending the
resources of a stack of Cisco Catalyst 3750 and 3750-X Series Switches. To the rest of the network, the stack
appears to operate as a single switch. StackWise technology is optimized for Gigabit Ethernet deployment,
bringing customers new levels of performance through the high-speed interconnect, resiliency through
advanced failover mechanisms, and ease of use through automated configuration and a single management
interface.
Q. What is the Cisco StackWise Plus technology?
A.
The Cisco StackWise Plus technology is built on the highly successful StackWise technology. StackWise Plus
provides an enhanced forwarding mechanism, provides a local switching capability, and adds destination
stripping of unicast packets (unlike StackWise, which uses source stripping for all packets). StackWise Plus
technology can support up to 468 Gigabit Ethernet ports in a stack or up to 18 10 Gigabit Ethernet ports in a
stack.
Q. What is the maximum number of Cisco Catalyst 3750-X Series Switches that can make up one stack?
A.
Up to nine Cisco Catalyst 3750-X switches can be stacked together.
Q. What is the Cisco StackPower technology?
A.
Cisco StackPower is a new technology developed by Cisco to allow efficient use of available power in a stack.
Cisco StackPower aggregates available power in a stack and shares the power where needed.
Q. How many Cisco Catalyst 3750-X Series Switches can make up a Cisco StackPower stack?
A.
Up to four switches can become part of the same Cisco StackPower stack in a ring topology (Figure 1).
Figure 1.
Cisco StackPower
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 10 of 22
By using an eXpandable Power System (XPS), you can build a larger Cisco StackPower stack consisting of nine
Cisco Catalyst 3750-X Series Switches, using a star topology.
Q. Why is Cisco StackPower restricted to four switches?
A.
It is limited by cable gauge and maximum current draw allowed.
Q. How many Cisco StackPower stacks can be built within one data stack?
A.
In theory, one switch is a stack on its own in terms of Cisco StackWise. In terms of Cisco StackPower, one
switch constitutes a StackPower stack of one switch.
The recommendation is to have Cisco StackPower stacks of four switch members to maximize the effect of
power aggregation and redundancy.
Another option is to build three Cisco StackPower stacks of three each, for a total of nine switches, matching
the maximum number of switch members in a Cisco StackWise stack (also known as a data stack).
Q. Can Cisco StackPower expand over two data stacks?
A.
Technically yes, but this is not recommended.
One Cisco StackPower stack can expand across two data stacks, but doing so is neither recommended nor
encouraged due to the complexity created in terms of managing power budgets that are monitored by one or
both of the data stacks masters. Power budget and allocation information is passed to the data stack master,
and when a Cisco StackPower stack spreads over two data stacks, both stack masters will receive information
about power that is not consumed in their own stacks, creating confusion and unexpected power-shedding
scenarios that would be difficult to troubleshoot.
Q. Is there a way to share power across all nine switches?
A.
An XPS can connect up to nine switches and becomes the Cisco StackPower master by default; hence, it
does not matter if all nine switches are part of one data stack or form many data stacks sharing the same
StackPower stack. The power budget and allocation information is passed to the XPS as the StackPower
master, and thus there is no chance of confusion among data stacks.
Q. What are the possible Cisco StackPower topologies?
A.
The Cisco StackPower solution can be deployed in two ways. One is by connecting one switch to another in
sequence, forming a closed physical ring of up to four switches; another is to attach up to nine switches to an
XPS in a hub-and-spoke fashion.
Both topologies have advantages. The ring topology allows for more creative deployments, such as the ZeroFootprint RPS, which is a way to provide redundant power without adding another device to the rack, thus
reducing the number of AC outlets required in a wiring closet.
Using an XPS has advantages as well. Up to nine switches can be protected with one power shelf, which
reduces the number of power supplies as well as the number of outlets required in the wiring closet. This
deployment can either support Cisco StackPower for up to nine Cisco Catalyst 3750-X Series Switches or
provide redundant power for up to nine Cisco Catalyst 3560-X switches.
The Cisco StackPower solution can be used with stackable switches only and RPS functionality can be used
with standalone switches only.
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 11 of 22
Q. What modes does the Cisco StackPower solution support?
A.
The Cisco StackPower solution has the flexibility to support various deployments:
●
Power-sharing mode
●
Redundant mode
●
RPS mode (with XPS only)
Power-sharing mode allows the stack to aggregate and share the entire amount of power available among all
the switches in the stack. If needed, all power gets allocated until the entire power budget is depleted.
Redundant mode allows a customer to plan for potential power supply failures. When this mode is configured,
Cisco StackPower sets aside an amount of power equal to the capacity of the largest power supply in the
system, in case a power supply fails or the power source of that power supply fails. This mechanism is
considered better than the mechanism of a traditional redundant power supply because there is no chance for
a latent failure to occur during the power switch-over to the redundant power supply, since the redundant
power is already online as part of the power available in the system. This is known as 1+N as opposed to
1:N redundancy.
RPS mode allows a customer to configure a one-to-one redundancy; that is, one specific power supply is
designated to back up one specific system and nothing else. This mode is available only on the XPS.
Q. Is the Cisco StackPower solution supported on the Cisco Catalyst 3560-X Series Switches?
A.
No. Although StackPower can be deployed in a ring or star topology using an XPS, it can be deployed only
with Cisco Catalyst 3750-X Series Switches. The XPS can work only in RPS mode when deployed with Cisco
Catalyst 3560-X switches.
Q. Can I build a Cisco StackPower stack with Cisco Catalyst 3560-X Series Switches?
A.
No. The standalone switches do not have the capability to form a ring topology and share power. Cisco
StackPower and StackWise Plus are features of the stackable switches.
Q. Can I share power on my Cisco Catalyst 3560-X Series Switches by using an XPS?
A.
No. The Cisco Catalyst 3560-X switches do not have the capabilities to share power with the XPS or with
another switch.
Q. What happens when a power supply fails in a power stack configured in Redundant mode?
A.
The entire amount of reserved power is made available upon a power supply failure, without regard to which
type or size of power supply failed.
Q. What is the "reserved" power?
A.
When the Cisco StackPower solution is configured in redundant mode, it aggregates all of the power available
in the stack (from all power supplies in the stack) and then subtracts an amount of power that it keeps in
reserve. The amount of reserved power is determined by the size of the largest power supply in the stack. The
remaining power is used to power up all of the switches and PoE devices similar.
This mechanism allows the stack to be resilient and withstand a single power supply failure, regardless of the
type of power supply that fails. That is, the failed power supply could be 350W, 715W, 440W DC, or 1100W,
and the system can protect against that failure because the "reserved" power is sized for the worse case.
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 12 of 22
Notice that no mechanism allows the stack to be resilient and withstand a single power supply failure,
regardless of the type of power supply that fails. That is, the failed power supply could be 350W, 715W, 440W
DC, or 1100W, and the system can protect against power supply is singled out or placed in reserved mode. All
power supplies are online, and the StackPower solution works with the overall budget.
Q. Is the Cisco RPS 2300 compatible with the Cisco Catalyst 3750-X and 3560-X Series Switches?
A.
No. Customers cannot use the older Cisco RPS 2300 with the new Cisco Catalyst 3750-X and 3560-X Series
switches because the power supplies and the system design are not compatible.
With the Cisco Catalyst 3750-X and 3560-X Series, customers have the options to provide redundancy with
dual power supplies, with the flexible features of Cisco StackPower, and with an XPS.
Cisco StackPower and all of the new power train enhancements require a new redundancy system that
provides capabilities similar to those of Cisco StackPower in an XPS and a new set of high-efficiency power
supplies. These new power supplies are different and provide different voltages; therefore, the existing Cisco
RPS 2300 is not compatible with the requirements of the Cisco Catalyst 3750-X and 3560-X Series Switches
or with the newer power supplies.
Q. Do I need to populate all of the power supply slots in my switch?
A.
No. The Cisco Catalyst 3750-X and 3560-X Series Switches provide two slots for the use of redundant power
supplies, but only one supply is needed to run a single switch unless full PoE+ is deployed on a 48-port switch.
In that case, the power requirement is about 1700W, which is more than the 1100W provided by the largest
available power supply. If the switch is deployed within a Cisco StackPower stack, a second power supply may
not be needed if the stack has extra power to meet the requirements of this switch, though the power supply
slot must be covered to maintain proper airflow.
Q. Does it matter which power supply slot is used in a single power supply deployment?
A.
No. It does not matter which slot is used if the switch is to remain in a standalone deployment. If the switch is
deployed in a Cisco StackPower stack, it is recommended that you fill in slot A first on every switch in the
stack before using any slot B in any switch of the stack.
Q. Do I need special cables for the Cisco StackPower solution?
A.
Yes. Cisco StackPower has special keyed cables to be used to build the power stack.
Two cables are available, one for the XPS, which connects to a Cisco Catalyst 3750-X or 3560-X. The second
cable is used to stack Cisco Catalyst 3750-X switches and build a StackPower stack ring. Notice that these
cables are keyed so that they can fit only in their intended scenarios.
Q. What is the length of the Cisco StackPower cables?
A.
There are two types of cables, StackPower cables and XPS cables. The StackPower cables come in two
lengths, 30 cm and 150 cm. The XPS cables come in two lengths also, 58 cm and 150 cm. Table 9 gives the
product IDs for these cables.
The reason for the cable length limitation is the amount of current that can be carried. Longer cables would
have to be thicker, which would affect their flexibility. There is no plan for longer cables.
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 13 of 22
Table 9.
Cisco StackPower and XPS Cables
Product ID
Description
CAB-SPWR-30CM
30-cm StackPower cable
CAB-SPWR-150CM
150-cm StackPower cable
CAB-XPS-58CM
Short XPS cable
CAB-XPS-150CM
Long XPS cable
Q. Can Cisco StackPower take power supplies offline automatically?
A.
No. This feature is planned for the future. The command-line interface (CLI) to control the state of a power
supply currently exists, but the switch would not automatically make that decision for a customer; more
intelligence needs to be developed. Either EnergyWise or Cisco IOS Embedded Event Manager (EEM) are
available to implement a policy to turn off redundant power supplies during off-hours.
Q. Can you mix power supplies in Cisco Catalyst 3750-X and 3560-X Series Switches?
A.
Yes. You can mix the power supply types either in a standalone switch or in a stack. That is, you can combine
a 350W AC power supply (the default for a data-only switch) with a 1100W AC power supply (the default in a
full PoE switch) or with a 440W DC power supply.
Q. Why would you mix a DC power supply with an AC power supply?
A.
You can power up the AC power supply via the standard AC power source available and then power up the
DC power supply via an uninterruptible power supply (UPS) system in the lab or data center.
Q. Will there be a Cisco StackPower MIB?
A.
Yes. The Cisco StackPower MIB objects are included in the StackWise MIB.
Q. Can you give priority to an important switch in the stack?
A.
The Cisco StackPower solution assigns a default priority to the switches in a stack as well as to the ports (high
or low) of every switch. The administrator has the ability to change and program these priorities.
Q. Is there a way to know the power-shedding priority of my stack?
A.
Yes. A CLI is available to display the current set of priorities for the entire stack. See the command reference
for "show stackpower".
Q. Can the Cisco StackPower solution boot up a switch that does not have a power supply?
A.
Yes. By using the extra power capacity available in the stack, StackPower allows the system to supply power
to a switch that does not have a power supply or that has a failed power supply.
Q. Can I power up a Cisco Catalyst 3560-X Series Switch through the Cisco StackPower solution?
A.
No. Although the Cisco Catalyst 3560-X switches have connectors similar to the connectors on the Cisco
Catalyst 3750-X switches, they do not support Cisco StackPower and cannot share power.
Q. What happens when I oversubscribe the power budget in my stack?
A.
The Cisco Catalyst 3750-X and 3560-X Series Switches have an intelligent mechanism to shed power when
the system goes into a negative power budget. This scenario can occur after a power failure or the offlining of
a power supply in a stack. The stack will shed power starting with the lowest-priority powered devices (PDs) in
the entire system, then the high-priority PDs, then the low-priority switches, and finally the high-priority
switches until a balance is reached.
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 14 of 22
Once a power budget goes negative, Cisco IOS Software will send warning messages about the situation and
the potential outage that a negative budget represents. Power shedding will initiate immediately if strict mode
has been configured.
PoE Support (IEEE 802.3af, IEEE 802.3at and UPOE)
The following section discusses the PoE features available in the Cisco Catalyst 3750-X and 3560-X Series
Switches, which include support for standard PoE and the new PoE+ standard.
Q. Do the Cisco Catalyst 3750-X and 3560-X Series PoE switches support the IEEE 802.3af or 802.3.at
standards?
A.
Both standards are supported; that is, the Cisco Catalyst 3750-X and 3560-X Series PoE switches can detect
and support 802.3af and 802.3at PDs. Up to 30W per port on all 48 ports is possible. Full PoE+ (802.3at)
requires 1.45kW of PoE power; therefore, more than one power supply is needed in a standalone switch. In
the case of stackable switches, the Cisco StackPower solution allows the system to draw power from the stack
and provide the power needed to support full PoE+ on all 48 ports. Additionally, the UPOE-capable 3750-X
and 3560-X models can support up to 60 watts per port. UPOE-enabled ports can be used to deliver power for
all current PoE/PoE+ solutions in addition to UPOE devices, including VDI clients, IP turrets for financial
trading, personal Cisco TelePresence® systems, and more.
Q. Can the Cisco Catalyst 3750-X and 3560-X Series PoE switches detect Type 1 and Type 2 PDs?
A.
The Cisco Catalyst 3750-X and 3560-X Series support both the PoE and PoE+ standards and can classify a
PD as either Type 1 or 2 with a one-event classification. A Type 2 PD supports Class 4 in order to obtain more
power than is supported by the legacy power levels (30W). A Type 1 PD can support only up to Class 3, or
15.4W.
Q. Can the Cisco Catalyst 3750-X and 3560-X Series PoE switches support two-event classification?
A.
No. Two-event classification is specific to mid-spans that work a (Power supplying equipment) PSE. The Cisco
Catalyst 3750-X and 3560-X Series support only one-event classification.
Q. Do the Cisco Catalyst 3750-X and 3560-X Series PoE switches support power classification?
A.
Yes, the Cisco Catalyst 3750-X and 3560-X Series Switches can optionally detect the PD power classification
signature and budget the appropriate power. This reduces the maximum power that must be budgeted by the
switch and provisioned in the wiring closet.
Q. What is the maximum power per port that the Cisco Catalyst 3750-X and 3560-X Series PoE switches can
supply?
A.
The Cisco Catalyst 3750-X and 3560-X Series support both PoE standards, 802.3af and 802.3at, which define
the maximum power that can be supplied to a port. The switches can provide up to 30W per port. On the
UPOE-capable 3750-X and 3560-X models, the switch can support up to 60W per port.
Q. Do I need two power supplies on the Cisco Catalyst 3750-X and 3560-X Series PoE switches to deploy PoE+
(802.3at)/UPOE?
A.
The requirement for PoE+ is 1440W for a 48-port switch or 720W for a 24-port switch, in addition to the system
power requirements, which include the reserved power needed to power up the Cisco StackPower stack
during formation. This requirement already exceeds the rating of any available power supply; therefore, a
second power supply would be needed unless the switch is part of a Cisco StackPower stack and the system
can provide the remaining power required. In case of the UPOE-capable 3750-X and 3560-X models, the
maximum POE budget available is 1800W, which can power all 24 UPOE ports on 24-port models and up to
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 15 of 22
30 UPOE ports on the 48-port models. In order to realize the 1800W UPOE budget, the switch must use 2 x
1100W AC power supplies.
Q. What pair set is used to support DC power in the Cisco Catalyst 3750-X and 3560-X Series PoE switches?
A.
The pairs 2 and 3 (pins 1, 2, 3, and 6) of the four pairs in Category 3 and 5 cables are used for both the
Ethernet data signals and the DC power at the same time. The PD must accept either polarity of power from
either pair set. This allows the use of both crossover and straight cables. Only straight cables should be used
with the prestandard Cisco PDs.
Q. Do the Cisco Catalyst 3750-X and 3560-X Series Switches have a DC-to-DC converter to support PoE with
the DC power supply?
A.
Yes. The Cisco Catalyst 3750-X and 3560-X Series have a DC-to-DC converter and support PoE even with
the 440W DC power supply. This is made possible by the use of a single power output from the power
supplies to the system, allowing the power supplies to output the same voltage and moving the complexity of
the power supply design to the switch itself, where the power is properly adjusted to the power levels needed.
Hence, it does not matter how the power is generated; the switch sees one voltage level and works with it.
Q. Can I still use the Cisco Power Calculator to help me determine power consumption for my new Cisco Catalyst
3750-X or 3560-X Series Switch?
A.
Yes. The Power Calculator tool has been updated to cover the Cisco Catalyst 3750-X and 3560-X Series in
terms of power consumption for the system and for the PD. Remember that PoE power is dissipated at the PD
and not at the switch. Top
Confidentiality
Q. Do the Cisco Catalyst 3750-X and 3560-X Series Switches support the Cisco TrustSec solution?
A.
Cisco TrustSec is an end-to-end solution, and the Cisco Catalyst 3750-X and 3560-X Series include support
for it. At first customer shipment, encryption will be supported only on the user ports, along with support for
Security Group Tag (SGT) Exchange Protocol (SXP). No hardware tagging is supported at this time.
Q. What hardware encryption is included in the Cisco Catalyst 3750-X and 3560-X Series Switches?
A.
The Cisco Catalyst 3750-X and 3560-X Series support 802.1ae encryption at line rate. This hardware
encryption is done between the switch port and the client's network interface card (NIC). Some Intel NIC and
LAN on Motherboard (LoM) components already support 802.1ae. Some PC and laptop manufacturers may
have not implemented the encryption feature, although the capability is already available.
Q. The NICs in my installed client base do not have encryption capability. Will I be able to deploy Cisco Catalyst
3750-X and 3560-X Series Switches in my network?
A.
Cisco will offer a software-based application that can provide encryption for legacy PCs and laptops. In these
cases, the software client will handle encryption. This client will also provide for key negotiation as described
by MACsec Key Agreement (MKA).
Q. Do the Cisco Catalyst 3750-X and 3560-X Series Switches have encryption on all ports, including the uplinks?
A.
No. Hardware encryption is provided only on the user ports (downlinks).
Q. What is the competition doing in terms of hardware encryption?
A.
IEEE 802.1ae is a standard; hence any competitor has the same opportunity to build products that support
encryption. The strength of the Cisco Catalyst 3750-X and 3560-X Series Switches is that encryption is just
one piece of the whole Cisco TrustSec solution, and competitors can offer only point products or features. Top
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 16 of 22
Licensing and Warranty
Q. Why should I purchase a Cisco Technical Services contract for these switches when they include a limited
lifetime warranty (LLW)?
A.
Cisco service and support has received numerous industry recognitions and awards for excellence.
Adding a Cisco Technical Services contract to warranty coverage provides access to the Cisco Technical
Assistance Center (TAC) beyond the 90-day period allowed by the LLW. It also can provide a variety of
hardware replacement options to meet critical business needs, as well as updates for licensed premium Cisco
IOS Software and registered access to the extensive Cisco.com knowledge base and support tools.
For information about Cisco Technical Services, visit http://www.cisco.com/go/ts.
For information about the Cisco LLW, visit http://www.cisco.com/go/warranty.
Q. Do the Cisco Catalyst 3750-X and 3560-X Series Switches comes with a limited lifetime warranty?
A.
Yes. The new Cisco Catalyst 3750-X and 3560-X Series come with the LLW:
Enhanced limited lifetime warranty (LLW) with next business day (NBD) advance hardware replacement and
90 day access to Cisco Technical Assistance Center (TAC) support.
Q. What are the service options?
A.
Table 10 shows the service options for the Cisco Catalyst 3750-X and 3560-X Series Switches.
Table 10.
Service and Warranty Information for Cisco Catalyst 3750-X and 3560-X Series Switches
Service Element
Warranty
Cisco® Smart Foundation
Cisco SMARTnet Service
Duration of Coverage
As long as the original customer
owns the product
Renewable 1-, 3-, and 5-year
contracts
Renewable 1 year and multi-year
contracts depending on product
family
Cisco Technical
Assistance Center (TAC)
Support
LLW: Not included
Business hours access to SMB TAC
(access levels vary by region)
24x7 coverage
Online Support/Web
Access
Unregistered access only
Available through Smart Foundation
Portal
Direct 24x7 registered access
Advance Hardware
Replacement
LLW: 10 business days*
E-LLW: Next business day**
Next business day as available,
otherwise same day ship
Next business day, 8x5x4, 24x7x4,
24x7x2 delivery options as available
On-site Support
No
No
Cisco SMARTnet® Onsite service
options available
E-LLW: Business hours access for
90 days
* Cisco or its service center will use commercially reasonable efforts to ship a replacement part within ten (10) working days after
receipt of the RMA request. Actual delivery times might vary depending on reseller and customer location. Taxes, duties, and
import fees may apply.
** Cisco or its service center will use commercially reasonable efforts to ship a replacement for next business day delivery, where
available. Otherwise, a replacement will be shipped within ten (10) working days after receipt of the RMA request. Actual delivery
times might vary depending on reseller and customer location. Taxes, duties, and import fees may apply.
Q. How do I request a return materials authorization (RMA) for an IP Services switch?
A.
RMAs are done like-for-like by SKU for the Cisco Catalyst 3750-X and 3560-X Series models. Currently, there
are only LAN Base and IP Base SKUs; therefore, LAN Base and IP Base switches can be replaced, and IP
Services switches will have to be rehosted on site by customers.
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 17 of 22
Remember that you still have the option to run the temporary license in your switch in case of an emergency
requiring a higher license level. Check the configuration guide for more details.
Q. Do the Cisco Catalyst 3750-X and 3560-X Series Switches require licensing to enable Cisco IOS Software
feature sets?
A.
Yes. The Cisco Catalyst 3750-X and 3560-X Series Switches run the Universal image, which means that a
license is required to enable the Cisco IOS Software feature sets: LAN Base, IP Base, and IP Services. Note
that the proper license comes already installed in the switch from manufacturing as ordered.
Q. Do I need to load a license file into my switch?
A.
When you order a new switch, it will arrive with the proper feature set license already loaded. The only time
you need to install a license file into your switch is when you do a feature set upgrade.
Service Module
General
Q. What SFPs are supported on the Service Module?
A.
Service module supports the same SFPs that are supported by the C3KX-NM-1G and C3kX-NM-10G. Please
refer to the Cisco Catalyst 3750X datasheet for more details.
Q. I have a Cisco Catalyst 3750X/3560X switch with LAN Base license on it. Can I use the Service Module to
configure MACSec and Netflow?
A.
No. In order to use the Netflow and MACSec features, the switch must be running IP Base or IP Services
license levels.
Q. In future, when I update my switch Cisco IOS Software version, (for example from 12.2(55) SE to 12.2(58)
SE), do I have to upgrade the software on the Service Module as well?
A.
Yes. The software image for the Service Module must be upgraded every time the switch Cisco IOS Software
version is upgraded. The software for the Service Module can be found on the same page as the Cisco IOS
Software download for the Cisco Catalyst 3750X and 3560X.
Q. What will happen if I update my switch Cisco IOS Software (for example from 12.2(55) SE to 12.2(58) SE) and
not the software on the Service Module?
A.
If you are upgrading a switch with the Service Module inserted, you are forced to upgrade the Service Module
software as well (using the archive download-sw CLI). If you are plugging in a Service Module to a switch
running a new version of Cisco IOS Software code, the Service Module will behave in pass-through mode till
you upgrade the software on the module. Netflow and MACSec can be configured after the software upgrade
is complete.
Q. Can I do Flexible Netflow monitoring and MACSec at the same time?
A.
Yes. You can do both at line-rate without compromising on switch performance.
Q. Is my Service Module ready to use when I plug it into my Cisco Catalyst 3750x/3560X switch?
A.
Service Module is ready for use if the Hardware Board Revision number of the switch is 0x03. Hardware Board
Revision Number can be obtained from executing the "show version" CLI on the switch console.
Snippet from the CLI output:
512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address
: F8:66:F2:2B:62:00
Motherboard assembly number
: 73-12557-04
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 18 of 22
Motherboard serial number
: FDO14290JB6
Model revision number
: A0
Motherboard revision number
: A0
Model number
: WS-C3560X-48P-S
Daughterboard assembly number
: 800-32786-01
Daughterboard serial number
: FDO1429068M
System serial number
: FDO1429K02V
Top Assembly Part Number
: 800-31328-01
Top Assembly Revision Number
: A0
Version ID
: V01
CLEI Code Number
: COMJP00ARA
Hardware Board Revision Number
: 0x03
If the Hardware Board Revision number is not 0x03, the Service Module can only be used as a regular uplink
module. Netflow and MACSec cannot be used. In order to upgrade your switch to Hardware Board Revision
number 0x03, please refer to the field notice on Cisco.com.
Netflow
Q. Why do I need Netflow in the access layer switch?
A.
Enabling Netflow at the access switch makes sure that the traffic from the user ports are monitored. The
access switch is the most logical place in the network for collecting statistics and monitoring flows as it is able
to use the location base of the endpoint on MAC address and interface port number provided by the access
switch. Access switch has a variety of identity mechanisms for user authentication, and adding user
awareness is the natural progression that can be developed. Access switches are an order of magnitude
greater than distribution and core, which makes them scale well for Netflow and make sure there are no
performance effects of oversubscription at aggregation and core.
Q. Does the Service Module support Flexible Netflow?
A.
Yes. Flexible Netflow is supported and the exporting format is version 9 per RFC 3954.
Q. Are there any performance issues if I turn on Netflow at line rate?
A.
No. There is dedicated custom hardware for NetFlow monitoring, which does all the Netflow operations.
Therefore there is no effect on packet forwarding performance and latency.
Q. How many simultaneous flows are supported?
A.
32000.
Q. How many simultaneous monitors are supported?
A.
128.
Q. What is the number of exporters per monitor?
A.
10 exporters per monitor are supported when attaching the monitor to the interface. After this, the user is free
to add as many exporters as they want.
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
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Q. What are the key fields that can be used to define the flow?
A.
The supported key fields are as follows:
Layer 2
●
Source and destination MAC addresses
●
Source and destination VLAN IDs
●
Dot1q fields
●
Ether-type
Layer 3: IPv4
●
Source and destination IP address
●
Header length
●
TTL
●
Protocol
●
Fragmentation fields
●
Version
●
TOS
●
Length fields
Layer 3: IPv6
●
Source and destination IP address
●
Hop limit
●
Next header
●
Protocol
●
Fragmentation fields
●
Traffic class
●
Version
●
Length fields
Layer 4
●
Destination ports
●
Source ports
●
ICMP fields
●
IGMP fields
●
UDP fields
●
TCP fields
Q. What is the difference between key and nonkey fields?
A.
Key fields are the match parameters that you define for a given flow. Nonkey is miscellaneous data related to
the flow: for example, first time stamp, last time stamp, packets, counters, and so on, which can be seen either
using switch CLI or on the Collector software.
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 20 of 22
Q. Where are the flows stored?
A.
Flows are stored in the custom hardware dedicated for Netflow operation.
Q. Can I monitor every flow in my switch using the Service Module?
A.
All flows that pass the uplink ports are supported. Flows that do not traverse the uplinks like the flows between
two access ports on the same switch or switch stack are not supported at FCS.
Q. Is Netflow better than sFlow? Why?
A.
A. Yes. Netflow accounts for all the packets for a given flow. Also Netflow monitors the interface for incoming
flows at all times. Sflow on the other hand uses sampling for collecting the traffic, and the sampled traffic may
not indicate the traffic type and volume as accurately as Netflow.
Q. Where can I find more information on Flexible Netflow?
A.
More information is available at http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6555/ps6601/
ps6965/prod_qas0900aecd804be091.html.
Q. What is MACsec?
A.
MACsec is IEEE 802.1ae industry standard for L2 hop-by-hop encryption.
Q. Do I need a service module for encrypting user access ports connecting to PCs, IP phone, and so on?
A.
No. Cisco Catalyst 3750x/3560x supports MACsec on downlink ports connecting to user access devices such
as PCs and IP phones without requiring a service module.
Q. What MACsec use cases require a service module?
●
Switch to switch encryption in campus: wiring closet access to distribution or core
●
Encryption using fiber ports
●
Encryption over 10G
Q. What can I expect in terms of MACsec performance? Is there any degradation in switch performance?
A.
No. MACsec is supported at line rate (over 1G and 10G), and the encryption is done in hardware, making sure
that there is no performance degradation.
Q. Can I connect a Cisco Catalyst 3750x/3560x service module to another Cisco Catalyst 3750x/3560x service
module and encrypt Ethernet link between them?
A.
Yes. MACsec can be enabled between Cisco Catalyst 3750x/3560x switches with service module. Service
module ports have to be configured with Cisco Security Association Protocol (SAP) for management of
MACsec keys.
Q. Are there any other Cisco network devices to which the service module can connect over a MACsec encrypted
link?
A.
Yes. Cisco switches including Cisco Catalyst 3750x/3560x, Cat 6k with Supervisor 2T and Cisco Nexus® 7k
use the same key management protocol (SAP) and interoperate with each other. Service module ports have to
be configured Cisco SAP for key management.
Q. Can I use MKA key management for encrypting switch-to-switch links?
A.
No. MKA is only supported for end user access ports such as PC, phone, and other user access devices.
Typically downlink ports connect to end user access ports and need to be configured with MKAny time a
switch-to-switch link needs to be encrypted, both ends of the link have to be configured with Cisco SAP for key
management.
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 21 of 22
Q. Could I connect two Cisco Catalyst 3750x/3560x copper ports and encrypt the link between them using
MACsec?
A.
This is not a common use case, due to distance limitations of copper. But this is a supported scenario and
does not require the service module. Any time a switch-to-switch link needs to be encrypted, both ends of the
link have to be configured with Cisco SAP for key management.
Q. If a 3560C compact switch is connected to a Cisco Catalyst 3750x/3560x on the downlink port, how do I set up
MACsec between them?
A.
Any time a switch-to-switch link needs to be encrypted, both ends of the link have to be configured with Cisco
SAP for key management. Compact switch support for switch-to-switch encryption is planned for a future
release. With this future release, link between Cisco Catalyst 3750x/3560x and 3k-C compact switch can be
encrypted with Cisco SAP.
Q. Is there a requirement for a specific client for user access port encryption?
A.
Yes. Cisco AnyConnect 3.0 client is required for MACsec encryption on a client.
Q. Could I use MACsec and NEAT (CISP) together on a port?
A.
No. MACsec and NEAT are mutually exclusive. MACsec provides L2 hop-by-hop encryption, which makes
NEAT redundant.
Q. Could I just use MACsec for switch-to-switch authentication (Cisco Network Device Admission Control
[NDAC]) without encryption of traffic?
A.
Yes.
Q. Does switch-to-switch encryption require Cisco NDAC?
A.
Yes, encryption is performed after successful switch-to-switch authentication (NDAC).
Q. What infrastructure do you need for setting up switch-to-switch encryption with the service module?
A.
In order to successfully set up switch to switch MACsec encryption, the following are needed:
a) Cisco Catalyst 3750x with the service module one end.
b) Cisco Catalyst 3750x with the service module OR Cisco Catalyst 6k Sup 2T OR Cisco Nexus 7k on the
other end.
c) ACS server ver 5.2 or higher for initial SAP key.
Q. I don't have an ACS Server. Can I still enable encryption between the switches?
A.
Yes. Using statically configured keys on both switches, encryption can be enabled without the ACS server.
Printed in USA
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
C67-578933-05
05/13
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