Routing with Frame Relay, X.25, and SNA

Routing with Frame Relay, X.25, and SNA
Chapter 7
Routing with Frame
Relay, X.25, and SNA
T
his chapter discusses Frame Relay, X.25, and SNA Routing. Also see
the following:
• Section 4.2, Identifying the BANDIT in the Network
• Section 4.3, Defining Global Paths
• Section 10.2.2, Ping
• Step 4 (Trace Route) in Section 10.1, System Tools
7.1
Routing
The Routing option allows you to perform address mapping, or routing, by
establishing routing tables that guide packets on their paths through the
network. The unit can route packets conforming to the IP, IPX, Frame Relay,
X.25, Annex G (that is, X.25 over Frame Relay), and SNA protocols. This
chapter provides detailed information and procedures for configuring
Frame Relay, X.25, and SNA routing.
BANDIT Products Software Configuration and Maintenance Guide
7-2
Chapter 7: Routing with Frame Relay, X.25, and SNA
Note: IP and IPX routing are discussed in Chapter 6, IP Routing and
IPX Routing.
The units are designed to look at the address portion of these packets and
route them to the corresponding port, according to the routing tables. If
routing entries have already been made, you are given the option to add,
modify, or delete entries.
1
On the Main Menu, select Advanced Configurations, then Routing.
™ When you select Routing on the Advanced Configurations
menu, the Configure Routing menu is displayed:
Configure Routing
-----------------1) IP Routing
2) IPX Routing
3) Frame Relay Routing
4) X.25 Routing
5) SNA Routing
Enter Choice :
7.2
Frame Relay
You can configure use of synchronous or asynchronous Frame Relay in the
BANDIT devices. Transporting data over a Frame Relay network has many
benefits:
• Can carry many connections over a single line.
• Shares bandwidth with multiple applications and/or call sessions.
• Can handle bursty traffic.
• Provides high-speed and low-delay similar to Time Division
Multiplexing (TDM).
• Provides access to public Frame Relay services (not based on usage) that
are usually lower cost than those for leased lines.
BANDIT Products Software Configuration and Maintenance Guide
Frame Relay
7-3
The BANDIT provides a cost-efficient means for connecting legacy
equipment to a Frame Relay network by translating protocols into a format
that can be transmitted over a Frame Relay network. After the unit translates
the data, it routes the data across the Frame Relay network to another unit
or Frame Relay-compatible device. When it reaches the destination device,
the data is translated back to the original protocol.
The BANDIT can also concentrate and switch multiple sources of Frame
Relay traffic simultaneously.
Note: Before configuring Frame Relay parameters, study the information in
Section 7.2.2, Heartbeat Polling, and Section 7.2.3, FastPROTECT with Priority.
7.2.1
Using DLCIs for Frame Relay
Because a single physical connection to a Frame Relay network can support
a large number of applications or sessions, a method is required to uniquely
identify the data flow associated with each application or session. This is
performed in Frame Relay by way of logical connections or Virtual Circuits
(VCs). Frame Relay’s VCs are called Data Link Connections (DLCs). Each
DLC has an identifying number, known as a Data Link Connection Identifier
(DLCI). This DLCI is used in the Frame Relay packet header as an address
for the data contained in the packet.
Although Frame Relay supports switched service that allows connections to
be temporarily established, most Frame Relay services (and equipment used
to provision the services) implement DLCs as Permanent Virtual Circuits
(PVCs)—i.e., the connections are preconfigured by the network operator at
the time of subscription. The assigned DLCIs must be configured for your
unit. It is important to note that a DLCI has local significance only; the other
end of a PVC probably has a different DLCI.
For example, suppose a PVC has been provisioned between site A and site B.
The PVC is assigned a DLCI of 100 at site A, and a DLCI of 500 at site B. Data
sent from site A with a DLCI of 100 is carried over the first PVC to arrive at
site B. Similarly, data sent from site B must use a DLCI of 500 to arrive at
site A.
The Frame Relay interface standard defines a maximum of 1024 possible
DLCIs. Of these, two DLCIs (0 and 1023) have been reserved for signaling,
and 30 DLCIs (1 to 15 and 1008 to 1022) have been reserved for future use.
That leaves 992 DLCIs (16 to 1007) available for subscriber use on each
physical interface to the network.
BANDIT Products Software Configuration and Maintenance Guide
7-4
Chapter 7: Routing with Frame Relay, X.25, and SNA
7.2.2
Heartbeat Polling
Heartbeat polling is the procedure by which the user device requests PVC
status information and detects faults in the network connection or the userto-network interface, as follows:
Note: This information can be acquired from the Frame Relay carrier. The
defaults set in the unit are appropriate for most networks.
1
Every T1 seconds (time value 1, in seconds), the user device sends a
STATUS_ENQUIRY message to the network. This message is
typically a request for the Sequence Number Exchange Only (report
type = “00000001”).
2
Every N1 polling intervals, the user device sends a Full Status
Message request (report type = “00000000”) to the network.
3
The network responds to the STATUS_ENQUIRY message with a
STATUS message. The STATUS report type matches the report type
of the STATUS_ENQUIRY message—i.e., either Sequence Number
Exchange Only or Full Status Message.
4
The unit examines the STATUS message, and updates its internal
database according to the PVC Status Information Element (IE).
5
An error has occurred if:
• The report type of the STATUS message does not match the report
type of the most recently transmitted STATUS_ENQUIRY request.
• The unit does not receive a STATUS message within T1 seconds
after sending the STATUS_ENQUIRY message.
• The network device does not receive a STATUS_ENQUIRY
message within T2 seconds of the last STATUS_ENQUIRY.
7.2.3
FastPROTECT with Priority
FastPROTECT™ is a congestion management feature that allows traffic to be
discarded to protect the unit from memory overload. In the congestion
management scheme, only data going out a Frame Relay port is subject to
discarding. The discard algorithm discards packets, based on the number of
memory buffers available and according to the priority assigned to that
BANDIT Products Software Configuration and Maintenance Guide
Frame Relay
7-5
packet. At 25% of available buffers, both Low and Medium priority data are
discarded. At 10% of available buffers, High priority traffic is discarded. At
20 or fewer buffers, Immediate priority data is also discarded.
7.2.4
Frame Relay Routing
This procedure configures Frame Relay ports and their corresponding
DLCIs when the BANDIT is used as a Frame Relay switch.
Note: To configure the Frame Relay protocol (in addition to Frame Relay
routing), see Section 7.2.5, Frame Relay Protocol.
1
To configure Frame Relay routing, do the following:
a
Log in to the BANDIT. (See Section 3.2, Connecting a Supervisory
Terminal and Logging in to the BANDIT.)
b
On the Main Menu, select Advanced Configurations. (See
Section 3.3, The Main Menu.)
c
On the Advanced Configurations Menu, select Routing. (See
Section 3.3.4, The Advanced Configurations Menu.)
d
On the Routing menu, select Frame Relay Routing. (See Section 7.1,
Routing.)
™ If the routing table is empty, prompts will ask you to add a path
name and to indicate the priority for outgoing traffic.
Empty Frame Relay Routing Table
Add Frame Relay Routing Table Entry
Add First Frame Relay Path Name
Enter Path Name (1 to 10 Characters): FR01
BANDIT Products Software Configuration and Maintenance Guide
7-6
Chapter 7: Routing with Frame Relay, X.25, and SNA
2
Type a name for a Frame Relay path.
™ If the path name does not exist, a prompt asks whether you wish
to add it to the Path table.
Path Name Does Not Exist In GPT Table.
To Add Global Path Entry, Press 'Y'or Enter.
3
Press Escape Otherwise. y
Answer y (or n, if you choose not to add the path name to the table).
™ A prompt lets you choose the path type.
Global Path Types
-----------------1) X25 SVC
2) X25 PVC
3) Frame Relay PVC
4) Port Type
5) IP/UDP
Enter Choice : (1 to 5)[1] : 3
4
Choose Frame Relay PVC.
™ A prompt asks which port the path uses.
Enter FR Port Number
5
(L (LAN),W (WAN),M (MODEM), S (SERIAL),): S
Choose the port that uses Frame Relay (in this example, we choose
the serial port).
™ A prompt asks for the Frame Relay DLCI.
Enter FR DLCI Number (16-1007) : 16
BANDIT Products Software Configuration and Maintenance Guide
Frame Relay
6
7-7
Enter the DLCI assigned by the Frame Relay carrier.
™ A prompt asks whether there is a backup DLCI.
Do You Want Backup DLCI? (Y/N)[N] : N
7
Answer y or n to indicate whether there is a backup DLCI.
™ If there is a backup DLCI, you must enter its information.
™ When configuration of the path is complete, a message indicates
that the path has been added to the Global Path Table (GPT).
GPT Entry added.
™ Then a prompt asks for the priority of traffic on the DLCI.
Enter Priority ( default = Medium )
for outgoing traffic on DLCI 16, port: SERIAL
(1)
(2)
(3)
(4)
Immediate
High
Medium
Low
Enter Choice : 3
8
Select the DLCI’s traffic priority.
™ A message indicates the DLCI information.
Priority set to Medium for DLCI 16 on port: SERIAL
BANDIT Products Software Configuration and Maintenance Guide
7-8
Chapter 7: Routing with Frame Relay, X.25, and SNA
™ Then the BANDIT asks for another path name.
Add Second Frame Relay Path Name
Enter Path Name (1 to 10 Characters):
9
Do one of the following:
a
If you wish to enter another path name, return to Step 2
b
If there is not another path name, press Escape.
™ A prompt indicates that configuration of the Frame Relay
Routing Table has completed.
Frame Relay Routing Table Handling Complete
™ When the routing table has been set up, the Configure Routing
menu is displayed again.
Configure Routing
-----------------1) IP Routing
2) IPX Routing
3) Frame Relay Routing
4) X.25 Routing
Enter Choice :
10
When you have finished configuring Frame Relay routing, press
Escape to return to the Routing menu. (See Section 7.1, Routing.)
BANDIT Products Software Configuration and Maintenance Guide
Frame Relay
7.2.5
7-9
Frame Relay Protocol
Note: If you are using the Frame Relay port for Frame Relay Passthrough
or for Frame-Relay-to-Frame-Relay Switching, you must complete the
Frame Relay Routing Table (see Section 7.2.4, Frame Relay Routing).
See Section 9.2.7, Frame Relay Statistics, for a description of the statistics used
to monitor this protocol.
1
From the Main Menu, select Advanced Configurations, Data
Configurations >> Serial Port >> Undefine Logical Port. Then
select Protocol >> Frame Relay.
™ When you select Frame Relay from the Logical Port Protocol
Selection Menu, the following menu is displayed:
Frame Relay Management Parameters : SERIAL
----------------------------------------------1) Type
: Synchronous Frame Relay
2) Speed
: 56000
3) Protocol : Adaptive Management - User
4) Value N1 : 6
5) Value N2 : 3
6) Value N3 : 4
7) Timer T1 : 10
8) Timer T2 : 15
9) Priority / CIR Enforcement : Disabled
A) High to Medium Ratio : 4:1
B) Medium to Low Ratio : 4:1
C) DLCI CIR Information
D) FRF-12 Fragmentation : Disabled
Enter Choice :
2
Select Type. This parameter specifies whether the clock type is
synchronous or asynchronous.
™ The following menu options are displayed:
BANDIT Products Software Configuration and Maintenance Guide
7-10
Chapter 7: Routing with Frame Relay, X.25, and SNA
Frame Relay Type
1) Synchronous
2) Asynchronous
Enter Choice :
a
3
Select the type of clocking you want.
Select Speed. This parameter sets the clock speed.
™ One of the following list of speeds is displayed:
• Synchronous speeds:
Configure Synchronous Clock Speed
1) 2400
2) 4800
3) 9600
4) 19200
5) 38400
6) 48000
7) 56000
8) 64000
9) 96000
A) 128000
B) 192000
C) 256000
D) 384000
E) 512000
F) 768000
G) 1024000
H) 1536000
I) 2048000
Enter Choice:
BANDIT Products Software Configuration and Maintenance Guide
Frame Relay
7-11
• Asynchronous speeds:
Configure Asynchronous Clock Speed
----------------------------------1) 1200
2) 2400
3) 4800
4) 9600
5) 19200
6) 38400
7) 48000
8) 57600
9) 115200
A) 230400
Enter Choice :
Note: When the port is configured as DTE, as opposed to DCE, the
parameters menu reflects that the speed is provided by the device
connected to the unit. In this case, you do not need to configure
speed. If you attempt to configure the speed, the following message
is displayed, and you are returned to the parameters menu:
Port is DTE, Can Not Change Speed
4
Protocol. This option allows you to select the Frame Relay
management protocol you are using. Select Protocol.
™ The following menu is displayed:
Frame Relay Management Protocol
-------------------------------1) ANSI T1.617 Annex D - User
2) CCITT Q.933 Annex A - User
3) LMI - User
4) Adaptive Management - User
5) ANSI T1.617 Annex D - Network
6) CCITT Q.933 Annex A - Network
7) LMI - Network
8) Adaptive Management - Network
9) None
Enter Choice :
BANDIT Products Software Configuration and Maintenance Guide
7-12
Chapter 7: Routing with Frame Relay, X.25, and SNA
Note: Frame Relay can also be run without management protocol.
Your Frame Relay carrier or Network Administrator can tell you
which protocol to use. The default is Adaptive Management - User.
a
Select the Frame Relay Management protocol you want to use.
™ The new protocol is displayed on the Frame Relay Management
Parameters menu.
Note: The Frame Relay Management protocol provides access
procedures for the detection and notification of:
• Addition of a PVC
• Deletion of a PVC
• Availability (active state) of a configured PVC
• Unavailability (inactive state) of a configured PVC
• Local In-channel Signaling link reliability errors
• Local In-channel Signaling link protocol errors
BANDIT Products Software Configuration and Maintenance Guide
Frame Relay
7-13
Note: Currently there are three management standards and two
additional options. The management standards include:
• ITU Q.933 Annex A
• ANSI T1.617 Annex D
• Frame Relay Forum’s Local Management Interface (LMI)
Annex A and Annex D are quite similar; however, they are
incompatible with LMI. Annex A and Annex D use DLCI 0, whereas
LMI uses DLCI 1023. Our products can support either the Network
or User side of these protocols.
There are two additional Frame Relay network management
options: Adaptive Management/User and Adaptive Management/
Network. These protocols allow the unit to automatically detect
whether ANSI T1.617 Annex-D or LMI is being used. Once LMI or
Annex D has been identified, the port continues to use that protocol
until the unit is reset. If in Network mode, the unit determines its
actual protocol from the first received Status Enquiry. If in User
mode, the unit alternates between issuing Annex-D and LMI Status
Enquiries until a Status Response is received. The Frame Relay
statistics screen indicates which protocol is being used.
5
Select Value N1. This parameter determines the number of Status
Inquiry/Status Polling Cycles that occur before a Full Status Polling
Cycle is initiated.
™ The following prompt is displayed:
Enter Desired Frame Relay Value N1 (1 - 255):
Note: The Value and Timer defaults were set to match the Frame
Relay Forum standards. They should not be changed unless
necessary. N1 (LMI) or N391 (T1.617 Annex D or A) are the N
parameters that require a “Full Status Message” in
STATUS_ENQUIRY Heartbeat Polling process. LMI, Annex A and
Annex D Defaults = 6 intervals.
BANDIT Products Software Configuration and Maintenance Guide
7-14
Chapter 7: Routing with Frame Relay, X.25, and SNA
a
Enter the Frame Relay value you want to use and press Enter.
™ This changes the value to the number you typed and returns you
to the “Frame Relay Management Parameters” menu.
6
Select Value N2. This parameter sets the error threshold count (N2).
The error threshold count (N2) reflects the number of Local Inchannel Signaling Link Reliability Errors that are allowed to occur
during a Sliding Monitored Events Window before the link is
considered down.
™ The following prompt is displayed:
Enter Desired Frame Relay Value N2 (1 - 10):
Note: A Monitored Event, from the network’s perspective, is an
event such as the expiration of a timer, the receipt of a Status
Enquiry message, etc. The Value and Timer defaults were set to
match the Frame Relay Forum standards. They should not be
changed unless necessary.
a
Enter the Frame Relay value you want to use and press Enter.
™ This changes the value to the number you typed and returns you
to the “Frame Relay Management Parameters” menu.
Note: LMI Default = 2 errors
Annex D N392 Default = 3 errors
Annex A N392 Default = 3 errors
7
Select Value N3. This parameter specifies the size of the Sliding
Monitored Events Count (a Monitored Event, from the network’s
perspective, is an event.
™ The following prompt is displayed:
BANDIT Products Software Configuration and Maintenance Guide
Frame Relay
7-15
Enter Desired Frame Relay Value N3 (1 - 10):
Note: The Value and Timer defaults were set to match the Frame
Relay Forum standards. They should not be changed unless
necessary.
Note: Value N3 is the number of monitored events (such as the
expiration of a timer, the receipt of a Status Enquiry message, etc.)
within which a predetermined number of N2 errors must be
detected before the link is considered down. This value also reflects
the number of monitored events that must occur with no N2 errors
before the link is considered back up.
a
Enter the Frame Relay value you want to use and press Enter.
™ This changes the value to the number you typed and returns you
to the “Frame Relay Management Parameters” menu.
Note: LMI Default = 4 events
Annex D N393 Default = 4 events
Annex A N393 Default = 4 events
8
Timer T1. This parameter sets the Link Integrity Verification Timer,
which indicates how frequently the unit should initiate a Status
Inquiry Message. Select Timer T1.
™ The following prompt is displayed:
Enter Desired Frame Relay Timer T1 (5 - 30):
BANDIT Products Software Configuration and Maintenance Guide
7-16
Chapter 7: Routing with Frame Relay, X.25, and SNA
Note: The Value and Timer defaults were set to match the Frame
Relay Forum standards. They should not be changed unless
necessary.
Note: When N2 errors of the last T1 number of monitored events
contain an error, the device declares a failed link.
For example, assuming the default values of N2 = 2 and T1 = 10
seconds, it takes 20 seconds to detect a failed link. All PVCs on the
failed link are set to inactive.
T1 is the length of the time spent waiting for a STATUS message
after sending STATUS_ENQUIRY (user devices).
Note: The device continues to send STATUS_ENQUIRY messages.
The link is removed from the failed state after receiving N3
consecutive messages without an error.
For example, assuming the default values of N3 = 4 and T1 = 10, it
would take 40 seconds for the link to restore to active status.
When the link is restored to active status, the network device
immediately sets all PVCs on the link to active. The user device sets
the PVCs to the status indicated by the first PVC status Information
Element that is successfully received.
a
Type the Frame Relay value you want to use and press Enter.
™ This changes the value to the number you typed and returns you
to the “Frame Relay Management Parameters” menu.
Note: LMI Default = 10 seconds
Annex D T391 Default = 10 seconds
Annex A T391 Default = 10 seconds
BANDIT Products Software Configuration and Maintenance Guide
Frame Relay
9
7-17
Timer T2. This option allows you to set the Polling Verification
Timer, which indicates the length of time the network should wait
between Status Inquiry messages. Select Timer T2.
™ The following prompt is displayed:
Enter Desired Frame Relay Timer T2 (5 - 30):
Note: The Value and Timer defaults were set to match the Frame
Relay Forum standards. They should not be changed unless
necessary.
Note: If no Status Inquiry message is received within T2 seconds,
the network records an error.
a
Type the Frame Relay value you want to use and press Enter.
™ This changes the value to the number you typed and returns you
to the “Frame Relay Management Parameters” menu.
Note: LMI Default = 15 seconds
Annex D T392 Default = 15 seconds
Annex A T392 Default = 15 seconds
10
Select Priority/CIR Enforcement. This parameter enables or disables
priority queuing on the Frame Relay port. Priority queuing allows
you to assign Immediate, High, Medium, or Low priority to data
being transmitted. Priorities can be set for a given DLCI’s protocol or
address range, or for an entire DLCI, without restrictions.
For example, you can assign a priority to particular protocol. In this
way, you might assign SNA traffic a high priority level, IPX traffic a
medium priority, and IP traffic a low priority.
BANDIT Products Software Configuration and Maintenance Guide
7-18
Chapter 7: Routing with Frame Relay, X.25, and SNA
You can assign different priority levels to distinct address ranges
going out the same DLCI. You might do this in the IP Routing Table
when configuring IP traffic. For instance, you might assign high
priority to IP traffic with a given address range going to users and
assign low priority to IP traffic with a different address range going
to a printer. This feature cannot be used with routing protocols that
automatically build their own routing tables, such as IP RIP, or IPX,
unless you configure the priority on their interfaces individually.
In some cases, you can assign a priority to a given DLCI, so that any
traffic traveling through that DLCI maintains the assigned priority,
regardless of data type or address. For example, you might set up a
Frame Relay routing table, assigning a high priority to a Network
DLCI being used to send traffic to an ATM machine and a low
priority to a different Network DLCI used to send traffic to a server.
In this table, you cannot assign two or more priorities to the same
DLCI as you can in the IP Routing Table example above.
When buffer space is low, as in the case of a network malfunction,
data may be discarded in the following order: low, medium, high
and then immediate priority. This phenomenon occurs regardless of
whether the queuing function is enabled or disabled in the Priority
field.
You can monitor data throughput and the reception of BECN bits,
which indicate congestion in the Frame Relay network, on an overall
or DLCI basis. Statistics for available and excess bandwidth are
maintained and recalculated as needed for each DLCI.
™ The following options are displayed:
Frame Relay Priority / CIR Enforcement
-------------------------------------1) Enable
2) Disable
Enter Choice :
a
11
Select the option you want.
Select High to Medium Ratio or Medium to Low Ratio.
BANDIT Products Software Configuration and Maintenance Guide
Frame Relay
7-19
High to Medium Ratio and Medium to Low Ratio. These options
define a byte ratio of high-to-medium or medium-to-low traffic. The
Priority level is set according to average ratio of bytes. However, all
transmissions are sent in whole frames.
Suppose a transmission contains 230 bytes, and these 230 bytes are
composed of:
• 2 frames at 160 and 10 bytes, respectively, of High priority
• 40 bytes of Medium priority traffic
• 20 bytes of Low priority traffic.
If the high-to-medium ratio is set to 4:1, and the medium-to-low ratio
is set to 2:1, the transmission would rotate between priority levels in
an order similar to the following:
• 160 bytes of High priority traffic is transmitted first
• 40 bytes of Medium priority traffic is transmitted next
• 20 bytes of Low priority traffic is transmitted next
• 10 bytes of High priority traffic is transmitted next.
With every transmission, the unit checks for traffic of all priority
levels in order to apply the ratio you have specified. However, if all
of the traffic in queue is set at the same priority level, this traffic is
sent continually until traffic with another priority level requests
transmission. At this point, the unit applies the ratio to the existing
traffic in queue.
™ One of the following traffic ratio menus is displayed:
High To Medium Priority Ratio Selection
1) 1:1
2) 2:1
3) 4:1
4) 8:1
5) 16:1
6) 32:1
7) 64:1
Enter Choice :
BANDIT Products Software Configuration and Maintenance Guide
7-20
Chapter 7: Routing with Frame Relay, X.25, and SNA
Medium To Low Priority Ratio Selection
1) 1:1
2) 2:1
3) 4:1
4) 8:1
5) 16:1
6) 32:1
7) 64:1
Enter Choice :
a
Select the ratio you want to use.
Note: The cycle of ratios is High to Medium to Low, and then to
High again. This allows lower priority traffic from the first
transmission to be sent before additional higher priority level traffic
from the second transmission is sent.
12
DLCI CIR Information. When configuring DLCIs, you can allocate
a designated amount of committed bandwidth to a DLCI, as long as
this bandwidth does not exceed the speed of the Frame Relay line.
This committed bandwidth, called Committed Information Rate
(CIR), is the amount of bandwidth a DLCI is guaranteed to have
available at all times for transmitting data. If the DLCI attempts to
send more data than can be carried within the boundary of its CIR,
such as in the case of bursty traffic, there is no guarantee that this
excess data is sent.
You must configure an excess bandwidth range for the DLCI. If
traffic is within the excess bandwidth range, it is delivered as long as
the Frame Relay line has space available to carry it. Both CIR and
excess bandwidth is negotiated with the service provider and must
be agreed upon and purchased before you configure the unit with
these values.
Any traffic exceeding the excess bandwidth range (Be) can be
automatically discarded by the service provider, regardless of
available bandwidth.
The priority queuing function monitors each DLCI’s committed and
excess CIR. Traffic being transmitted within its CIR is transmitted
before traffic using any allotted excess bandwidth.
BANDIT Products Software Configuration and Maintenance Guide
Frame Relay
7-21
Transmissions are made in the following order of priority:
CIR Immediate
CIR High
CIR Medium
CIR Low
Excess Immediate
Excess High
Excess Medium
Excess Low
Note: Immediate priority data, as long as it is within its allocated
CIR, preempts all other traffic in the queue (except management
traffic).
The DLCI CIR Information option allows you to configure CIR and
excess bandwidth for each DLCI. Select the DLCI CIR Information
field on the Frame Relay Management Parameters Menu.
™ The following prompts are displayed:
Table Is Empty.
Add Table Entry
Add DCLI Information
Enter DLCI Number (16 - 1007):
a
Enter the first DLCI number and press ENTER.
™ The following prompt is displayed:
Enter CIR (committed information rate) in bits per second:
b
CIR. Type the CIR you negotiated with the service provider, and
press Enter.
™ The following prompt is displayed:
BANDIT Products Software Configuration and Maintenance Guide
7-22
Chapter 7: Routing with Frame Relay, X.25, and SNA
Enter Bc (committed burst size) in bits:
c
Committed Burst Size (Bc). Type the Burst Size that you negotiated
with the service provider. Bc is the number of bits you can transmit
within a given time (T) in seconds. (T usually equals one second.) Bc/
T = CIR
Note: If T = 1 second, you can transmit X number of bits (Bc), wait
one second and transmit another X number of bits (Bc). In this
manner, the number of bps transmitted never exceeds the amount
of bandwidth the DLCI has been allocated.
Bandwidth
CIR
Bc
Time
Note: If T = 2 seconds, however, you can transmit twice as many
bits per second, but you must wait twice as long before you can
transmit more bits.
d
Enter the Committed Burst Size (Bc) and press ENTER.
™ The following prompt is displayed:
Enter Be (excess burst size) in bits:
e
Burst Excess Rate, B(e). Type the Burst Excess rate you negotiated
with the service provider. B(e) is the number of bits you can transmit
within a given time (T) in seconds. B(e)/T = CIR. The value for B(e)
is typically the line speed less the CIR and Bc.
BANDIT Products Software Configuration and Maintenance Guide
Frame Relay
7-23
Note: If the line speed is 56000 bps and the CIR and is 4000 bps, the
B(e) is 52000 bits, assuming T = 1.
f
Enter the B(e) value.
™ When all values for a DLCI are entered, the following prompt is
displayed and you have the opportunity to enter values for
additional DLCIs:
Entry Added
Enter DLCI Number (16 - 1007):
g
When you are finished entering values for all DLCIs, press Escape to
view the table of DLCI entries.
™ You are given the opportunity to add, change, or delete any
entry.
h
13
After you review the table and make any necessary changes, press
Escape again to return to the Frame Relay Management Parameters
Menu.
FRF-12 Fragmentation. Fragmentation of data packets on Frame
Relay allows for proper voice and data quality while sharing the
same port. If you wish, enable and configure this feature.
FRF.12 Parameters : SERIAL
----------------------------1) Fragmentation
: Disabled
2) Fragmentation Type
: Buffer Boundary
3) Fragmentation Size
: 128 bytes
Enter Choice :
Note: To save the new configuration, you must WRITE and RESET.
(See Section 3.3.7, Write Configuration, and Section 3.3.8, Reset Unit.)
BANDIT Products Software Configuration and Maintenance Guide
7-24
7.2.6
Chapter 7: Routing with Frame Relay, X.25, and SNA
Frame Relay Unicasting and Multicasting
A standard Frame Relay transmission uses the same DLCI to transmit to and
receive from one specified device. This is the default in the BANDIT.
The BANDIT can also set up a unicast transmission. The unicast feature
transmits on one DLCI (to one specified device) and receives on another
DLCI (from that same device). The unicast feature is specifically geared for
transmissions over satellite networks, to save bandwidth and support most
of the Frame Relay applications. (However, unicast can also be used over
ground-based networks.)
You can also set up multicast transmissions (to two or more specified
recipients). This option provides the capability for a device to transmit the
same application data to multiple DLCIs or the ability for a single device to
receive data from multiple DLCIs. This can be used as a replacement for
multidrop modems. At present, this feature is applicable only to data; it
cannot be used to multicast voice. (The multicast feature is not geared for nor
limited to satellite networks.)
Frame Relay multicasting can be used to send information from a central
point to several endpoints or to all endpoints.
Note: The BANDIT’s Frame Relay does not broadcast transmissions (that
is, it does not transmit to unspecified recipients, of any number).
How to Configure Frame Relay Unicasting or Multicasting
In this procedure, first we set up three standard Frame Relay paths. With
each standard path, you use one DLCI to send and receive information from
a single remote device.
Then we configure a unicast transmission, which includes an outgoing
Frame Relay path (to the remote device) and an incoming Frame Relay path
(from the remote device), on different DLCIs.
Finally, we configure a multicast group to include all three standard paths
and the outgoing unicast path. The local device sends a multicast
transmission to all remote devices at the same time.
1
From the Main Menu, select Advanced Configurations, Global
Paths.
BANDIT Products Software Configuration and Maintenance Guide
Frame Relay
7-25
™ If the Global Path Table already contains records, the table is
displayed. Go to Step 8.
™ If the Global Path Table is empty, the following prompt is
displayed.
Empty Global Path Table
Add Global Path Table Entry
Enter Path Name (1 to 10 Characters):
2
Do all of the following:
a
Type the name of a Frame Relay path (for example, remote1) and
press Enter.
™ The Global Path Types menu is displayed.
Global Path Types
-----------------1) X25 SVC
2) X25 PVC
3) Frame Relay PVC
4) Port Type
5) IP/UDP
6) Voice
7) FR Multicast Path
Enter Choice : (1 to 7)[1] :
b
Select Frame Relay PVC.
™ The following prompt is displayed.
Enter Port Number
c
(S(SERIAL),E(EXPANSION),R = RDU Ports,1-24):
Select the port for the Frame Relay PVC.
BANDIT Products Software Configuration and Maintenance Guide
7-26
Chapter 7: Routing with Frame Relay, X.25, and SNA
™ The following prompt is displayed.
Enter FR DLCI Number (16-1007) :
d
Indicate the DLCI for this path.
™ The following prompt is displayed.
Any Advanced Features ?
(B - Backup Path
(U - FrameRelay Unicasting
e
H - Help)
N - None) [N] :
For a standard path, select None.
™ The following message is displayed.
Entry added.
To View the entry press ESC or To Add another entry
Enter Path Name (1 to 10 Characters):
3
Set up another standard Frame Relay path, called remote2. (See
Step 2.)
4
Then set up another standard Frame Relay path, called remote3.
(See Step 2.)
5
Then set up a unicast Frame Relay path, as follows:
a
Type the name of a Frame Relay path (for example, uni-out), and
press Enter.
™ The Global Path Types menu is displayed.
BANDIT Products Software Configuration and Maintenance Guide
Frame Relay
7-27
Global Path Types
-----------------1) X25 SVC
2) X25 PVC
3) Frame Relay PVC
4) Port Type
5) IP/UDP
6) Voice
7) FR Multicast Path
Enter Choice : (1 to 7)[1] :
b
Select Frame Relay PVC.
™ The following prompt is displayed.
Enter Port Number
c
(S(SERIAL),E(EXPANSION),R = RDU Ports,1-24):
Select the port for the Frame Relay PVC.
™ The following prompt is displayed.
Enter FR DLCI Number (16-1007) :
d
Indicate the DLCI for this path.
™ The following prompt is displayed.
Any Advanced Features ?
(B - Backup Path
(U - FrameRelay Unicasting
e
H - Help)
N - None) [N] :
For a unicast path, select Frame Relay Unicasting.
BANDIT Products Software Configuration and Maintenance Guide
7-28
Chapter 7: Routing with Frame Relay, X.25, and SNA
™ The following message is displayed.
Is this path Outgoing or Incoming?
f
Select Outgoing.
™ The following message is displayed.
Enter Incoming Path Name (1 to 10 Characters):
g
Type the name of the Frame Relay path for the other direction (for
example, uni-in), and press Enter.
™ The Global Path Types menu is displayed.
Global Path Types
-----------------1) X25 SVC
2) X25 PVC
3) Frame Relay PVC
4) Port Type
5) IP/UDP
6) Voice
7) FR Multicast Path
Enter Choice : (1 to 7)[1] :
h
Select Frame Relay PVC.
™ The following prompt is displayed.
Enter Port Number
i
(S(SERIAL),E(EXPANSION),R = RDU Ports,1-24):
Select the port for the incoming Frame Relay PVC.
BANDIT Products Software Configuration and Maintenance Guide
Frame Relay
7-29
™ The following prompt is displayed.
Enter FR DLCI Number (16-1007) :
j
Indicate the DLCI for the incoming path. This DLCI cannot be the
same as the outgoing DLCI.
™ The following prompt is displayed.
Entry added.
To View the entry press ESC or To Add another entry
Enter Path Name (1 to 10 Characters):
6
Add a multicast Frame Relay path, as follows:
a
Type the path name (for example, multi).
™ The Global Path Types menu is displayed.
Global Path Types
-----------------1) X25 SVC
2) X25 PVC
3) Frame Relay PVC
4) Port Type
5) IP/UDP
6) Voice
7) FR Multicast Path
Enter Choice : (1 to 7)[1] :
b
Select FR Multicast Path.
™ The following prompt is displayed.
BANDIT Products Software Configuration and Maintenance Guide
7-30
Chapter 7: Routing with Frame Relay, X.25, and SNA
Enter the Member Paths...
Enter Path Name (1 to 10 Characters):
c
Type the first path (remote1) for this multicast group, and press
Enter.
™ The following prompt is displayed.
Want to add more paths ? (Y/N)[Y] :
d
Do one of the following:
• To add another path to the multicast group, answer Y. Repeat
Step 6c. (Do this to add the paths remote2, remote3, and
uni-out).
• When you have finished adding paths, answer N.
™ The following prompt is displayed:
Entry added.
To View the entry press ESC or To Add another entry
Enter Path Name (1 to 10 Characters):
7
Press Escape.
™ The Global Path Table is displayed.
BANDIT Products Software Configuration and Maintenance Guide
X.25 Routing
Entry
----1
2
3
4
Path Name
---------remote1
remote2
remote3
uni-out
PathType
-------FR PVC
FR PVC
FR PVC
FR PVC
Port
---S
S
S
S
Entry
----5
Path Name
---------multi
PathType
-------FR MULTICAST PATH
7-31
DLCI
----16
17
18
19
Add, Modify, or Delete an Entry? (Enter A, M, or D):
8
7.3
Do one of the following:
a
To return to the Advanced Configurations menu, press Escape.
b
To add an entry, type a. Go to Step 2.
c
To modify an entry, type m and follow the instructions on the screen.
d
To delete an entry, type d and follow the instructions on the screen.
X.25 Routing
Note: To configure the X.25 protocol (in addition to X.25 routing), see
Section 7.4, X.25 Protocol.
1
To configure X.25 routing, do the following:
a
Log in to the BANDIT. (See Section 3.2, Connecting a Supervisory
Terminal and Logging in to the BANDIT.)
b
On the Main Menu, select Advanced Configurations. (See
Section 3.3, The Main Menu.)
c
On the Advanced Configurations Menu, select Routing. (See
Section 3.3.4, The Advanced Configurations Menu.)
d
On the Routing menu, select X.25 Routing. (See Section 7.1, Routing.)
BANDIT Products Software Configuration and Maintenance Guide
7-32
Chapter 7: Routing with Frame Relay, X.25, and SNA
™ The X.25 Routing Configuration menu appears. This menu lets
you configure the X.25 global parameters, including the X.25
switching table. You can configure the parameters as described in the
following steps.
X.25 Routing Configuration
--------------------------1) X.25 Switching Table
2) Proprietory Traffic Idle VC Timer : 180
3) SNA Traffic Idle VC Timer (seconds) : 180
4) IP/IPX Traffic Idle VC Timer (seconds) : 180
5) IP/IPX SVC Retry Timer (seconds) : 60
6) IP/IPX SVC Retry Count : 3
7) X.121 Sub-Address Length : 2
Enter Choice :
2
Select X.25 Switching Table to enter an X.121 destination address to
be mapped to a given port. Outbound calls destined to this address
will be routed through this port. Observe the following addressing
rules:
• Addresses must use digits; that is, permitted characters are
0 (zero) to 9.
• Addresses cannot start with 0 (zero).
• A question mark (?) is a one-digit wildcard. It can be used to
replace only one digit. You can have any number of question
marks. For example, if an address assigned to a port is 44?4, valid
addresses include 4404, 4474, 4424, etc., but not 44004.
• An asterisk (*) is a multidigit wildcard, to replace any number of
digits, from none to the entire address. In addition, you can use an
asterisk in as many positions as you wish. For example, if an
address assigned to a port is 12*, the port accepts any address
whose first two digits are 12. It does not matter how many digits,
if any, follow the 12. Valid addresses include 12, 128, 1209, and
12309, but not 1029. Or if an address on a port is configured as
55*9, valid addresses include 559, 5509, and 551239, but not
55001122933. It does not matter how many digits, if any, fall
between the initial 55 and the 9, but no digits are allowed to follow
the 9. (However, 55*9* does allow digits following the 9.)
™ The following prompt is displayed:
BANDIT Products Software Configuration and Maintenance Guide
X.25 Routing
7-33
Empty X25NEW Switching Table
Add X25NEW Switching Table Entry
Enter Remote X121 Address(1 to 15 digits):
a
Enter the X.121 destination address of the remote device or network,
and press Enter.
™ The following prompt is displayed:
Enter X25Sw Port Number (S(SERIAL),E(EXPANSION),R = RDU Ports,1-24):
b
Enter the port that X.25 calls will use to reach this remote X.121
address.
™ The following message and prompt are displayed.
Entry added.
To View the entry press ESC or To Add another entry
Enter Remote X121 Address(1 to 15 digits):
3
Do one of the following:
a
To add another record to the table, go to Step a.
b
To view the X.25 Switching Table, press Escape. You can continue
entering addresses or make changes to an existing entry. When you
finish, press Escape to return to the X.25 Routing Configuration
menu.
BANDIT Products Software Configuration and Maintenance Guide
7-34
Chapter 7: Routing with Frame Relay, X.25, and SNA
Num
Destination
X121 Address
1
1234
Out Port
SERIAL
Add, Modify, or Delete an Entry? (Enter A, M, or D):
4
Select Proprietary Traffic Idle VC Timer to specify the number of
seconds the line may remain idle before the call is cleared, when no
characters are being transmitted in either direction.
™ The following option is displayed:
Enter Prop. Prot. Idle Tmr(0 to 600)[180] :
Note: Proprietary Traffic Idle VC Timer is specific only to the
following proprietary protocols: Async Encapsulation, Bit Sync
Encapsulation, and Byte Sync Encapsulation.
a
5
Type the number of seconds the line may remain idle, and press
Enter.
Select SNA Traffic Idle VC Timer to set the maximum number of
seconds the X.25 connection established for SNA QLLC may remain
idle.
™ The following option is displayed:
Enter SNA Idle VC Timer(0 to 600)[180] :
a
Type the number of seconds for this timer, and press Enter.
BANDIT Products Software Configuration and Maintenance Guide
X.25 Routing
7-35
Note: When the timer expires, the call is cleared.
If you type 0 (zero) in this field, the timer is disabled and the virtual
circuit always remains up.
™ The X.25 Routing Configuration menu is redisplayed.
6
Select IP/IPX Traffic Idle VC Timer to set the maximum number of
seconds an IP or IPX connection may remain idle.
™ The following prompt is displayed:
Enter Idle VC Timer(0 to 600)[180] :
a
Type the number of seconds for this timer, and press Enter.
Note: When the timer expires, the call is cleared.
™ The X.25 Routing Configuration menu is redisplayed.
7
Select IP/IPX SVC Retry Timer to set the maximum number of
seconds to wait before the next IP or IPX call attempt can be made if
the previous call attempt was unsuccessful.
™ The following prompt is displayed:
Enter IP/IPX SVC Retry Timer(0 to 600)[60] :
a
Type the number of seconds and press Enter.
™ The X.25 Routing Configuration menu is redisplayed.
BANDIT Products Software Configuration and Maintenance Guide
7-36
Chapter 7: Routing with Frame Relay, X.25, and SNA
Note: When the timer expires, the call will be attempted again. (To
limit the number of retries, see Step 8.)
8
Select IP/IPX SVC Retry Count to set the number of times an IP or
IPX call attempt will be made if the previous call attempt was
unsuccessful.
™ The following prompt is displayed:
Enter IP/IPX SVC Retry Count (0 to 10)[3] :
a
Type the number of retries and press Enter.
™ The X.25 Routing Configuration menu is redisplayed.
Note: If the call is not successful after the configured number of
call attempts, the next IP or IPX call will be triggered by the IP/IPX
traffic.
9
Select X.121 Sub-Address Length to specify the maximum number
of digits that a sub-address can have.
™ The following prompt is displayed:
Enter X.121 Sub-Address Length(1 to 5)[2] :
a
Enter the number of digits allowed in the sub-address, and press
Enter.
™ The X.25 Routing Configuration menu is redisplayed.
10
When you have finished configuring X.25 routing, press Escape to
return to the Routing menu. (See Section 7.1, Routing.)
BANDIT Products Software Configuration and Maintenance Guide
X.25 Protocol
11
7.4
7-37
Press Escape until you return to the Main Menu.
X.25 Protocol
The BANDIT supports use of synchronous or asynchronous X.25. The X.25
protocol can be used for switching or for carrying QLLC, IP, or IPX traffic.
Note: In addition to standard X.25, the BANDIT can perform some
additional applications of X.25. See the following sections:
• Section 5.14, X.25 over IP
• Section 5.15.3, Converting AX.25 to MATIP.
7.4.1
X.25 Level-1 Configuration
Note: You must complete the X.25 Routing Table with the addresses of all
units in your network. (See Section 7.3, X.25 Routing.)
See Section 9.2.17, X.25 Statistics, for a description of the statistics monitored
in this protocol.
1
From the Main Menu, select Advanced Configurations, Data
Configurations; then select a port. Then select Undefine Logical Port
>> Protocol >> X.25+.
™ When you select X.25+ from the Logical Port Protocol Selection
Menu, the following menu is displayed:
X.25 Parameters : Port 1
---------------------------1) X.25 Level-1 Configuration
2) X.25 Level-2 (LAPB) Configuration
3) X.25 Level-3 (PLP) Configuration
Enter Choice :
BANDIT Products Software Configuration and Maintenance Guide
7-38
Chapter 7: Routing with Frame Relay, X.25, and SNA
2
Enter the number of the X.25 level you want to configure.
™ The corresponding menu is displayed on the screen.
Note: Make sure at least one X.25 port is enabled when Frame
Relay is not available.
1
Select X.25 Level-1 Configuration. This option allows you to
configure the physical level of X.25.
™ A menu similar to the following menu is displayed:
X.25 Level-1 Parameters : SERIAL
------------------------------------1) Type : Synchronous
2) Speed : 9600
3) Frame Relay Global Path Name : N/A
4) Encapsulation : N/A
Enter Choice :
Note: A virtual port’s menu does not show speed.
a
Select Type; then select Synchronous or Asynchronous.
b
Speed. This option allows you to set the synchronous clock speed
that units configured as DCE will use to provide clocking to the
user’s equipment. Select Speed.
Note: The Speed field is applicable only if you are configuring a
physical port. If you are configuring a logical port, proceed to
Step 2.
™ One of the following menus is displayed:
BANDIT Products Software Configuration and Maintenance Guide
X.25 Protocol
7-39
• Synchronous:
Configure Synchronous Clock Speed
---------------------------------1) 2400
2) 4800
3) 9600
4) 19200
5) 38400
6) 48000
7) 56000
8) 64000
9) 96000
A) 128000
B) 192000
C) 256000
D) 384000
E) 512000
F) 768000
G) 1024000
H) 1536000
I) 2048000
Enter Choice :
• Asynchronous:
Configure Asynchronous Clock Speed
----------------------------------1) 1200
2) 2400
3) 4800
4) 9600
5) 19200
6) 38400
7) 48000
8) 57600
9) 115200
A) 230400
Enter Choice :
Note: When the port is configured as DTE, as opposed to DCE, the
parameters menu reflects that the speed is provided by the device
connected to the unit. In this case, you do not need to configure
speed. If you attempt to configure the speed, the following message
is displayed and you are returned to the parameters menu:
BANDIT Products Software Configuration and Maintenance Guide
7-40
Chapter 7: Routing with Frame Relay, X.25, and SNA
Port is DTE, Can Not Change Speed
2
Select Global Path Name and indicate the path this port will use. See
Section 4.3, Defining Global Paths.
Note: This field is not applicable for a physical port.
3
Select Encapsulation and indicate the encapsulation method to use.
X.25 Level-1 Parameters : Port 4
--------------------------------------1) Type : Synchronous
2) Frame Relay Global Path Name : <NONE>
3) Encapsulation : Annex G
Enter Choice :
Note: This field is not applicable for a physical port. Use an
encapsulation method only on a virtual port.
4
7.4.2
Press Escape to return to the X.25 Parameters menu.
X.25 Level-2 Configuration
1
Select X.25 Level-2 Parameters (LAPB) Configuration. This option
allows you to configure the link level of the X.25 protocol.
™ The following menu is displayed:
BANDIT Products Software Configuration and Maintenance Guide
X.25 Protocol
X.25 Level-2 Parameters : SERIAL
----------------------------------1) Interface Mode(DTE/DCE)
2) Link Activator(DTE/DCE)
3) Acknowledgement Timer (T1)(seconds)
4) Response Timer (T2)(tenths of a second)
5) Disconnect Timer (T3)(seconds)
6) Retry Count (N2)
7) Frame Sequencing
8) Transmit Window Size
9) Receive Window Size
:
:
:
:
:
:
:
:
:
7-41
DTE
DTE
3
2
20
10
Modulo 8
7
7
Enter Choice :
2
Select Interface Mode (DTE/DCE). This option allows you to specify
whether the Interface Mode of the link level is DCE or DTE.
Note: In X.25, the Interface Mode must be opposite the mode of the
network or device to which the unit is connected. When the unit is
connecting to a public network, the unit must be in DTE mode. If
local unit is connected to an X.25 device, which is configured for
DCE, then the local unit should be configured for DTE. If the X.25
device is configured for DTE, then the local unit should be
configured for DCE.
™ The following prompt is displayed:
Enter IF Mode value
1->DTE or 2->DCE : (1 to 2)[1] :
3
Select the correct mode and press ENTER.
4
Select Link Activator (DTE/DCE). This option allows you to specify
which node (the node configured as DCE or the node configured as
DTE) will initiate or activate the link.
™ If the Interface Mode matches the Link Activator mode, this unit
will send SABMs. If the two modes do not match, this unit will wait
for SABMs. The following prompt is displayed:
BANDIT Products Software Configuration and Maintenance Guide
7-42
Chapter 7: Routing with Frame Relay, X.25, and SNA
Enter Link Activator 1->DTE or 2->DCE : (1 to 2)[1] :
Note: This default value is set to a universally accepted value. If
you change the default value, make sure the new setting is
consistent with the device or network to which the unit is
connected.
a
Select the mode (DCE or DTE) of the node that will initiate the link,
press ENTER.
™ The X.25 Parameters menu is redisplayed.
5
Select Acknowledgement Timer (T1) (seconds). This option allows
you to set the maximum number of seconds that the Level 2 protocol
must wait for acknowledgment of receipt of a transmitted frame.
™ The following prompt is displayed:
Enter T1 Timer value(1 to 10)[3] :
a
Enter the number of seconds to wait for acknowledgment and press
ENTER.
™ If no acknowledgment is received, the unit will re-send the frame
a configured number of times. If an acknowledgment is not received
after N2 retries, the link is disconnected. To set N2 (the number of
retries), see Step 8.)
6
Select Response Timer (T2) (tenths of a second). This option allows
you to set the maximum number of time units (in tenths of a second)
to wait before sending an acknowledgment for a sequenced I-frame
that has been received.
™ The following option is displayed:
BANDIT Products Software Configuration and Maintenance Guide
X.25 Protocol
7-43
Enter T2 Timer(0 to 100)[2] :
a
Enter the number of tenths of a second and press Enter.
Note: A value of zero means there will be no delay in
acknowledgment generation.
7
Select Disconnect Timer (T3). This option allows you to set the
number of seconds to wait before the link is considered
disconnected.
™ The following option is displayed:
Enter
a
8
T3 Disconnect Timer(30 to 180)[60] :
Enter the number of seconds and press Enter.
Select Retry Count (N2). This option allows you to set the number of
times a frame is retransmitted when no acknowledgment is received
and when the T1 timer has expired. (To set the T1 timer, see Step 5.)
™ If an acknowledgment is not received after N2 retries, the link is
disconnected. The following option is displayed:
Enter N2 Retransmit Count(1 to 30)[10] :
a
Enter the number of retries allowed and press Enter. The X.25
Parameters menu is redisplayed.
BANDIT Products Software Configuration and Maintenance Guide
7-44
Chapter 7: Routing with Frame Relay, X.25, and SNA
9
Select Frame Sequencing. This option allows you to set the frame
sequencing number. All frames must be assigned a number that
designates the individual frame’s proper sequential placement
within a stream of data to ensure that they arrive at their destination
in their original order and are not shuffled. The X.25 protocol allows
two measures of consecutive frame numbers: Modulo 8 and
Modulo 128.
Modulo 8 allows frame numbers to start at 0 and end at 7. After
frame number 7 is received at its destination, the number assignment
of frames begins again at 0. Modulo 128 allows frame numbers to
start at 0 and end at 127. After frame number 127 is received at its
destination, the number assignments of frames begins again at 0.
™ The following prompt is displayed:
Enter the Sequence Number Modulo 8 --> 1 , Modulo 128 --> 2(1 to 2)[1] :
a
10
Enter the sequence number and press Enter. The X.25 Level-2
Parameters menu is redisplayed.
Select Transmit Window Size. This option allows you to set the
maximum number of sequenced I-frames this unit is allowed to have
outstanding (outstanding frames are frames that have been sent but
not acknowledged).
For Example: Suppose you assign a value of three (3) in the Transmit
Window Size field. This unit can transmit up to three frames without
receiving acknowledgment for any of them. Once it has three
unacknowledged frames outstanding, the window is considered
blocked and it cannot transmit any more frame until at least one
frame is acknowledged. As each frame is acknowledged, another
frame can be sent, as long as the total number of frames that have
been sent but not acknowledged (the total number of frames
outstanding) does not exceed three. It is important, then, that the
Transmit Window Size of a given unit port match the Receive
Window Size of the connected device.
Note: The Transmit Window Size must be less than the number in
the Frame Sequencing field.
BANDIT Products Software Configuration and Maintenance Guide
X.25 Protocol
7-45
™ The following prompt is displayed:
Enter Transmit Window Size(1 to 127)[7] :
a
11
Enter the transmit window size and press ENTER.
Select Receive Window Size. This option allows you to set the
maximum number of sequenced I-frames this unit is allowed to
receive before it must send an acknowledgment.
™ The following prompt is displayed:
Enter Receiver Window Size(1 to 127)[7] :
Suppose the device to which this unit is connected has been configured
with a Transmit Window Size of 7. The connected device in this
example, then, can have a maximum of seven frames outstanding.
(Outstanding frames are frames that have been sent but have not
been acknowledged.)
The unit for which you are configuring the Receive Window Size can
withhold acknowledgment, then, for up to seven frames. If it
receives seven frames and does not acknowledge any of them, the
window is considered blocked and it cannot receive more frames
until it acknowledges at least one of those frames. As this unit
acknowledges each frame, it can receive another frame, as long as the
total number of frames that have been received but not
acknowledged (the total number of frames outstanding) does not
exceed seven.
It is important, then, that the Receive Window Size of a given unit
port match the Transmit Window Size of the connected device.
Note: The Receive Window Size must be less than the number in
the Frame Sequencing field.
BANDIT Products Software Configuration and Maintenance Guide
7-46
Chapter 7: Routing with Frame Relay, X.25, and SNA
a
12
7.4.3
Enter the receive window size and press Enter. The X.25 Level-2
Parameters menu is redisplayed.
Press Escape to return to the X.25 Parameters menu.
X.25 Level-3 Configuration
1
Select X.25 Level-3 (PLP) Configuration to configure the packet level
of the X.25 protocol.
™ The following menu is displayed:
X.25 Level-3 Parameters : SERIAL
----------------------------------1) Interface Mode(DTE/DCE)
: DTE
2) Transmit Packet Size
: 128
3) Receive Packet Size
: 128
4) Packet Sequencing
: Modulo 8
5) Transmit Window Size
: 2
6) Receive Window Size
: 2
7) Packet Restart Timer (T20)(seconds)
: 60
8) Packet Call Request Timer (T21)(seconds ) : 60
9) Packet Reset Request Timer (T22)(seconds) : 60
A) Packet Clear Request Timer (T23)(seconds) : 60
B) Incoming Call Facility Options
: PASS THROUGH FACILITIES
C) Outgoing Call Facility Options
: PASS THROUGH FACILITIES
D) High SVC Channel Number
: 10
E) Low SVC Channel Number
: 1
F) High PVC Channel Number
: 0
G) Maximum Number of Active SVCs Permitted
: 10
Enter Choice :
Note: Default values are set to universally accepted values. If you
change a default value, make sure the new setting is consistent with
the device or network to which the unit is connected.
2
Select Interface Mode. This option allows you to set the packet level
Interface Mode as DCE or DTE.
BANDIT Products Software Configuration and Maintenance Guide
X.25 Protocol
7-47
Note: In X.25, the Interface Mode must be opposite the mode of the
network or device to which the unit is connected. For example, if
local unit is connected to an X.25 device, which is configured for
DCE, then the local unit should be configured for DTE. If the X.25
device is configured for DTE, then the local unit should be
configured for DCE. The DTE/DCE selection governs the selection
of LCNs as calls are placed. DTE starts at the highest LCN and uses
LCNs in descending order. DCE starts at the lowest LCN and uses
LCNs in ascending order. LCN 0 is reserved for RESTART packets
that use LCN 0. LCNs are allocated in this manner to prevent call
collision.
™ The following prompt is displayed:
Enter IF Mode value
a
1->DTE or 2->DCE : (1 to 2)[1] :
Select the mode you want and press Enter.
™ The X.25 Level-3 Parameters menu is redisplayed.
3
Select Transmit Packet Size. This option allows you to set the
maximum length (in octets) of packets that can be sent on the line.
™ The following option is displayed:
Enter Transmitting Packet Size(128 to 4096)[128] :
a
Enter the size of the transmitting packet and press Enter.
™ The X.25 Level-3 Parameters menu is redisplayed.
4
Select Receive Packet Size. This option allows you to set the
maximum length (in octets) of packets that can be received on the
line.
™ The following prompt is displayed:
BANDIT Products Software Configuration and Maintenance Guide
7-48
Chapter 7: Routing with Frame Relay, X.25, and SNA
Enter Receiving Packet Size(128 to 4096)[128] :
a
Enter the size of the receiving packet and press Enter.
™ The X.25 Level-3 Parameters menu is redisplayed.
5
Select Packet Sequencing. This option allows you to set the packet
sequencing number.
Each packet must be assigned a number that designates the packet’s
proper sequential placement within a stream of data to ensure that
packets arrive at their destination in the original order and are not
shuffled. The X.25 protocol allows two measures of consecutive
packets numbers: Modulo 8 and Modulo 128.
Modulo 8 allows packets numbers to start at 0 and end at 7. After
packet number 7 is received at its destination, the number
assignment of packets begins again at 0. Modulo 128 allows packets
numbers to start at 0 and end at 127. After packet number 127 is
received at its destination, the number assignment of packets begins
again at 0.
™ The following prompt is displayed:
Enter the Sequence Number
2)[1] :
a
Modulo 8 --> 1 , Modulo 128 --> 2(1 to
Enter the sequence number and press Enter.
™ The X.25 Level-3 Parameters menu is redisplayed.
Note: Default values are set to universally accepted values. If you
change a default value, make sure the new setting is consistent with
the device or network to which the unit is connected.
BANDIT Products Software Configuration and Maintenance Guide
X.25 Protocol
6
7-49
Select Transmit Window Size. This option sets the maximum
number of sequenced packets this unit is allowed to have
outstanding. (Outstanding packets are packets that have been sent
but not acknowledged.)
Note: Suppose you assign a value of 2 in the Transmit Window
Size field. This unit can transmit up to two packets without
receiving acknowledgment for either of them. Once it has two
unacknowledged packets outstanding, the window is considered
blocked and it cannot transmit any more packets until at least one
packet is acknowledged. As each packet is acknowledged, another
packet can be sent, as long as the total number of packets that have
been sent but not acknowledged (the total number of packets
outstanding) does not exceed two.
It is important, then, that the Transmit Window Size of a given unit
port match the Receive Window Size of the connected device.
The Transmit Window Size must be less than the Packet
Sequencing number (modulo 8 or 128). At the link level, the
Transmit Window Size normally matches the Packet Sequencing
number.
™ The following option is displayed:
Enter Transmitting Window Size(1 to 127)[2] :
a
Enter the transmitting window size and press Enter.
™ The X.25 Level-3 Parameters menu is redisplayed.
7
Select Receive Window Size. This option allows you to set the
maximum number of sequenced packets this unit is allowed to
receive before it must send an acknowledgment.
BANDIT Products Software Configuration and Maintenance Guide
7-50
Chapter 7: Routing with Frame Relay, X.25, and SNA
Note: Suppose the device to which this unit is connected has been
configured with a Transmit Window Size of 7. The connected device
in this example, then, can have a maximum of seven packets
outstanding. (Outstanding packets are packets that have been sent
but have not been acknowledged.) The unit for which you are
configuring the Receive Window Size can withhold
acknowledgment for up to seven packets. If it receives seven
packets and does not acknowledge any of them, the window is
considered blocked and it cannot receive more packets until it
acknowledges at least one of those packets. As this unit
acknowledges each packet, it can receive another packet, as long as
the total number of packets that have been received but not
acknowledged (the total number of packets outstanding) does not
exceed seven. It is important, then, that the Receive Window Size of
a given unit match the Transmit Window Size of the connected
device.
The Receive Window Size must be less than the Packet Sequencing
number (modulo 8 or 128). At the link level, the Receive Window
Size normally matches the Packet Sequencing number.
™ The following prompt is displayed:
Enter Receiving Window Size(1 to 127)[2] :
a
Enter the receiving window size and press Enter.
™ The X.25 Level-3 Parameters menu will be redisplayed.
8
Select Packet Restart Timer (T20) (seconds). This option allows you
to set the number of seconds that the Level 3 protocol must wait for
a restart confirmation after issuing a Restart Packet. When this timer
expires, another Restart will be issued.
™ The following prompt is displayed:
Enter Restart timer value(10 to 600)[60] :
BANDIT Products Software Configuration and Maintenance Guide
X.25 Protocol
a
7-51
Enter the number in seconds and press Enter.
™ The X.25 Level-3 Parameters menu is redisplayed.
9
Select Packet Call Request Timer (T21) (seconds). This option
allows you to set the number of seconds allowed between issuing
Packet Call Requests and receiving either a Call Confirmation or a
Call Clear for SVC links. If this timer expires, a Clear is generated and
the LCN is freed.
™ The following prompt is displayed:
Enter Call Request Timer(10 to 600)[60] :
a
Enter the number in seconds and press Enter.
™ The X.25 Level-3 Parameters menu is redisplayed.
10
Select Packet Reset Request Timer (T22) (seconds). This option
allows you to set the number of seconds allowed between issuing a
Packet Reset Request and receiving either a Reset Confirmation or a
Clear. If this timer expires, the Reset Packet is retried the number of
times configured in the R22 parameter. (R22 is a system default that
cannot be configured by the user. The value currently set for R22 is
3 retries.)
™ The following prompt is displayed:
Enter Reset Request Timer(10 to 600)[60] :
a
Enter the number in seconds and press ENTER. The “X.25 Level-3
Parameters” menu is redisplayed.
BANDIT Products Software Configuration and Maintenance Guide
7-52
Chapter 7: Routing with Frame Relay, X.25, and SNA
11
Select Packet Clear Request Timer (T23) (seconds). This option
allows you to set the number of seconds allowed between issuing a
Packet Clear Request and receiving a Clear Confirmation. If a Clear
Confirmation is not received before this timer expires, a Clear
Request is generated. If a Clear Confirmation is still not received, a
Clear Request is generated again. The Clear Request message can be
generated up to the number of times specified in the R23 value. (R23
is a system default that cannot be configured by the user. The value
currently set for R23 is 3 tries.)
™ The following prompt is displayed:
Enter Clear Request Timer(10 to 600)[60] :
a
Enter the number in seconds and press ENTER.
™ The X.25 Level-3 Parameters menu is redisplayed.
12
Select Incoming Call Facility Options. This option allows you to
control the manner in which this port responds when presented with
any incoming Call Packet containing facilities that are not actively
supported by the system.
™ The following menu is displayed:
Options for Incoming Call Received with Facilities:
1. PASS THROUGH FACILITIES
2. REMOVE FACILITIES
3. CLEAR CALL
Enter Choice:(1 to 3)[1] :
• If you select Pass through Facilities, facilities (such as Reverse
Charging, NUI Passwords, etc.) that are not supported by the
receiving unit are passed through the system unchanged.
When a packet is received by the unit, the unit checks the
negotiation facilities (Window Size Negotiation and Packet Size
Negotiation) in the incoming packet. If the parameters being
negotiated in the incoming packet match the parameters
configured for the packet level in the unit, the unit strips the
BANDIT Products Software Configuration and Maintenance Guide
X.25 Protocol
7-53
negotiation facilities from the packet and passes the remaining
facilities to their destination.
If the parameters being negotiated in the incoming packet do not
match the parameters configured for the packet level in the unit,
the unit clears the call with a specific Cause and Diagnostic code
(Cause 03, Diagnostic 142 for Window Size Mismatch; and
Cause 03, Diagnostic 141 for Packet Size Mismatch).
• If you select Remove Facilities, all facilities are stripped from
incoming packets, and then the incoming packet is passed through
to its destination.
• If you select Clear Call, all incoming calls that have facilities are
cleared by the system with the Invalid Facility Clear Cause and
Diagnostic Code combination (Cause 83hex, Diagnostic 90hex).
a
Enter the number of the option you want to use and press ENTER.
™ The X.25 Level-3 Parameters menu is redisplayed.
13
Select Outgoing Call Facility Options. This option allows you to
control the manner in which this port responds when presented with
any output Call Packet containing facilities that are not actively
supported by the system.
™ The following options are displayed:
Options for Outgoing Call Facilities:
1. PASS THROUGH FACILITIES
2. REMOVE FACILITIES
3. CLEAR CALL
Enter Choice:(1 to 3)[1] :
• If you select Pass through Facilities, facilities (such as Reverse
Charging, Passwords, etc.) that are not supported by the
transmitting unit are passed through the system unchanged.
• If you select Remove Facilities, all facilities are stripped from
outgoing packets, and then the outgoing packet is passed through
to its destination.
• If you select Clear Call, all outgoing calls that have facilities are
cleared by the system with the Invalid Facility Clear Cause and
Diagnostic Code combination (Cause 03, Diagnostic 65).
BANDIT Products Software Configuration and Maintenance Guide
7-54
Chapter 7: Routing with Frame Relay, X.25, and SNA
a
Enter the number of the option you want and press ENTER.
™ The X.25 Level-3 Parameters menu is redisplayed.
14
Select High SVC Channel Number. This option allows you to set the
highest SVC channel number allowed in the SVC range.
Note: When assigning the highest SVC number, be certain to select
a number that is higher than all the SVC numbers you plan to
assign, and that is also higher than all of the PVC numbers you want
to configure.
Example: If you plan to configure a range of five SVCs, and you
also want to configure PVCs on logical channel numbers
(LCNs) 15-25, the High SVC Channel Number must be set at 31 or
higher because it must be, obviously, higher than the lowest SVC
number, and the lowest SVC number must be higher than any
PVC.
™ The following option is displayed:
Enter High SVC Number(1 to 4095)[10] :
a
Enter the highest SVC number allowed in the SVC range and press
Enter.
™ The X.25 Level-3 Parameters menu is redisplayed.
BANDIT Products Software Configuration and Maintenance Guide
X.25 Protocol
7-55
Note: If you change a default value, make sure the new setting is
consistent with the device or network to which the unit is
connected. The DTE/DCE mode governs the selection of Logical
Channel Numbers as calls are placed. Calls placed from a device or
network configured as DTE use the highest LCN available, with
each successive call using LCNs in descending order. Calls placed
from a device network configured as DCE use the lowest LCN first,
with each successive call using LCNs in ascending order. LCN 0 is
reserved for RESTART packets that use LCN 0. LCNs are allocated
in this manner to prevent call collision.
15
Select Low SVC Channel Number. This option allows you to set the
lowest SVC number allowed in the SVC range.
When you set the high end of the SVC range (in Step 14), the system
automatically adjusts the range of channel numbers offered in the
Low SVC Channel Number option so that the lowest SVC number
cannot be higher than the High SVC Channel Number.
Note: The highest SVC and the lowest SVC can be the same
number. If you configure the lowest and highest SVC fields with the
same number, only one SVC is permitted.
™ The following prompt is displayed:
Enter Low SVC Number(1 to 10)[1] :
a
Enter the lowest SVC number allowed in the range and press Enter.
™ The X.25 Level-3 Parameters menu is redisplayed.
16
Select High PVC Channel Number. This option allows you to set the
maximum number of PVCs that can be configured for this port.
™ The following prompt is displayed:
BANDIT Products Software Configuration and Maintenance Guide
7-56
Chapter 7: Routing with Frame Relay, X.25, and SNA
Enter High PVC Number (0 to 0) [0] :
a
Enter the highest number for a PVC configured on this port, and
press Enter.
™ The X.25 Level-3 Parameters menu is redisplayed.
17
Select Maximum Number of Active SVCs Permitted. This option
allows you to set the highest number of SVC channels that can be
active at any one time.
™ The following prompt is displayed:
Enter High SVC Number(0 to 100)[10] :
a
Enter the number of SVCs allowed and press Enter.
™ The X.25 Level-3 Parameters menu is redisplayed.
18
7.5
Press Escape until you return to the Main Menu.
SNA Routing for 1490
The SNA routing feature enables the unit to reduce the traffic over Frame
Relay by spoofing SDLC supervisory traffic locally. It also allows the unit to
extend the seven-hop limitation in the Token Ring architecture by another
six hops by terminating each Token Ring connection locally. These six hops
are added in the Token Ring network connected to the remote side of the
Frame Relay network.
The unit carries only the traffic of end-to-end significance (except when the
connection is idle for a configured amount of time, at which time it also
carries keep-alive messages).
This feature supports SNA connectivity through synchronous serial ports
(for Frame Relay and SDLC), as well as Ethernet and Token Ring ports on
the unit. All unit serial ports (including the Network port) can be configured
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
7-57
for SNA 1490. The SNA feature is fully standards-based, ensuring
compatibility with any device using the same standard.
Note: See Section 9.2.17.3, LLC Statistics, Section 9.2.17.4, QLLC Statistics,
and Section 9.2.12, SNA Switching Statistics, for descriptions of statistics used
to monitor these routing protocols.
Note: SNA routing is available only on units with SNA software. If your
unit is coded with X.25-track software, this module is not available.
Before configuring a port for SNA 1490 routing, have the following
information:
• Connectivity scenario (SDLC–FR, LLC–FR, or SDLC–LLC)
• Type of end device (host or terminal) on each side of the connectivity
scenario
• In the case of an SDLC end device: the physical port number and the
control unit (CU) address
• In the case of a Frame Relay end device or a connection through Frame
Relay:
- Frame Relay port number
- DLCI number
- Whether you are using BNN (default) or BAN Encapsulation
- SAP addresses configured in the immediate Frame Relay device
- MAC addresses configured in the immediate Frame Relay device (only
for BAN)
• In the case of a Token Ring end device: the MAC and SAP addresses
configured in the end-device
• If the Token Ring end device is in a multi-hop Token Ring network:
- Local Ring Number. This is the Ring Number assigned to the Ring
connected to the Token Ring port. The default value is “1.” To change
this, select Advanced Configurations, Data Configurations from the
Main Menu, then select Token Ring and then Local Ring Number.
BANDIT Products Software Configuration and Maintenance Guide
7-58
Chapter 7: Routing with Frame Relay, X.25, and SNA
- Ring and Bridge Numbers of the Token Ring network connected to the
local ring. These are used only to identify whether the default pseudo
Ring Number or the default pseudo Bridge Number is a duplicate of
any other Ring or Bridge number in the local Token Ring network.
You can use a standard SNMP manager or an async terminal connected to
the supervisory port to manage a BANDIT port configured for SNA 1490.
7.5.1
SNA Configuration
1
From the Main Menu, select Advanced Configurations, Routing,
SNA Routing.
™ When you select SNA Routing, the following screen is displayed.
This screen lets you enable SNA 1490 and change its parameters.
SNA Configuration
-----------------1) SNA Global Parameters
2) LLC-FR Switching Table
3) SDLC-FR Switching Table
4) SDLC-LLC Switching Table
5) SDLC-QLLC Switching Table
6) LLC-QLLC Switching Table
7) LLC Stations Table (Optional)
Enter Choice :
2
See the following sections to configure the items in this menu:
• Section 7.5.1.1, SNA Global Parameters
• Section 7.5.1.2, LLC–FR Switching Table
• Section 7.5.1.3, SDLC–FR Switching Table
• Section 7.5.1.4, SDLC–LLC Switching Table
• Section 7.5.1.5, SDLC–QLLC Switching Table
• Section 7.5.1.6, LLC–QLLC Switching Table
• Section 7.5.1.7, LLC Stations Table
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
7.5.1.1
7-59
SNA Global Parameters
1
On the SNA Configuration menu (see Section 7.5.1, SNA
Configuration), select SNA Global Parameters.
™ The SNA Global Parameters Configuration menu is displayed.
This menu lets you set SNA global parameters.
SNA Global Parameters Configuration
-----------------------------------1) SNA Modules' Status
: UP
2) SNA TEST/XID Max Retries
: 10
3) SNA TEST/XID Retry Timer (Seconds) : 5
4) SNA Session Restart Timer (Seconds) : 20
5) SNA QLLC Call Retry Timer (Seconds)
: 5
6) SNA QLLC Query Retry Timer (Seconds) : 5
7) SNA QLLC Max Retries
: 3
8) SNA FRAD Pseudo-Bridge Number
: 2
9) SNA FRAD Pseudo-Ring Number
: 5
Enter Choice :
2
Select SNA Modules’ Status to enable SNA 1490 functionality. (By
default, this functionality is enabled.)
™ The following menu is displayed:
SNA Modules' Status
-------------------1) DOWN
2) UP
Enter Choice :
a
Select Up to enable SNA 1490 functionality or Down to disable it.
™ The SNA Global Parameters Configuration menu is redisplayed.
3
Select SNA TEST/XID Max Retries to enter the number of times the
system will re-send TEST/XID frames on a Token Ring or Frame
Relay LLC in the event of unsuccessful TEST/XID polls.
™ The following prompt appears:
BANDIT Products Software Configuration and Maintenance Guide
7-60
Chapter 7: Routing with Frame Relay, X.25, and SNA
Enter TEST/XID Retry Count(1 to 20)[10]:
a
Type the number of times to send TEXT/XID frames (until
successful), and press Enter.
™ The SNA Global Parameters Configuration menu is redisplayed.
4
Select SNA TEST/XID Retry Timer to specify how many seconds
the system attempts to send TEST/XID frames (until successful).
™ The following prompt appears:
Enter TEST/XID Retry Timer in Seconds(1 to 60)[10]:
a
Type the number of seconds for this timer, and press Enter.
™ The SNA Global Parameters Configuration menu is redisplayed.
5
Select SNA Session Restart Timer to enter the amount of time the
unit must wait before restarting a session with TEST polls, in the
event that there were no successful TEST/XID polls within the
number of retries specified in the TEST/XID Retry Count.
™ The following prompt appears:
Enter SNA Session Restart Timer(1 to 180)[20]:
a
Type the number of seconds for this timer, and press Enter.
™ The SNA Global Parameters Configuration menu is redisplayed.
6
Select SNA QLLC Call Retry Timer to set the maximum number of
seconds to wait before the next QLLC call attempt can be made, if the
previous call attempt was unsuccessful.
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
7-61
™ The following prompt is displayed:
Enter QLLC Call Retry Timer(1 to 60)[5] :
a
Type the number of seconds for this timer, and press Enter.
Note: When this timer expires, the call is attempted again for the
number of times configured in the SNA QLLC Max Retries field. If
the call is still not successful, the BANDIT waits for the time
specified in the SNA Session Restart Timer field before the call is
retried again.
™ The SNA Global Parameters Configuration menu is redisplayed.
7
Select SNA QLLC Query Retry Timer to set the maximum number
of seconds to wait before the next QLLC command is sent, in the
event that the previous QLLC command attempt was not
acknowledged.
™ The following prompt is displayed:
Enter QLLC Query Retry Timer(1 to 60)[5] :
a
Enter the maximum number of seconds to wait before sending the
QLLC command again (until successful), and press Enter.
Note: When the timer expires, the query is attempted again for the
number of times configured in the SNA QLLC Max Retries field. If
the QLLC command is still not successful, the call is cleared.
™ The SNA Global Parameters Configuration menu is redisplayed.
BANDIT Products Software Configuration and Maintenance Guide
7-62
Chapter 7: Routing with Frame Relay, X.25, and SNA
8
Select SNA QLLC Max Retries to set the number of times a QLLC
call retry mechanism or QLLC command query mechanism is
retried.
™ The following prompt is displayed:
Enter QLLC Max Retry Count(1 to 20)[3] :
9
Enter the maximum number of times a call or QLLC command can
be retried, and press Enter.
™ The SNA Global Parameters Configuration menu is redisplayed.
10
Select SNA FRAD Pseudo-Bridge Number to enter the Bridge
Number assigned to the unit’s entire WAN/SDLC network. This is
useful when the unit is communicating over a Token Ring network
or over Frame Relay with BAN encapsulation. This number must be
unique in the Token Ring network connected to the local Token Ring
port.
™ The following prompt is displayed:
Enter Pseudo-Bridge Number(1 to 15)[2]:
11
Select SNA FRAD Pseudo-Ring Number to enter the Ring Number
assigned to the unit. This is useful when the unit is communicating
over a Token Ring network or over Frame Relay with BAN
encapsulation. This number must be unique in the Token Ring
network connected to the local Token Ring port.
™ The following prompt is displayed:
Enter Pseudo-Ring Number(1 to 4095)[5]:
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
a
7-63
Enter the pseudo-ring number and press Enter.
™ The SNA Global Parameters menu is redisplayed.
12
7.5.1.2
When you have finished configuring the items discussed in this
procedure, press Escape to return to the SNA Configuration menu.
(See Section 7.5.1, SNA Configuration.)
LLC–FR Switching Table
This option allows you to enter parameters for connecting Token Ring or
Ethernet devices to Frame Relay SNA devices.
Note: The “LLC” in this section refers only to Token Ring LLC. The “FR” in
this section indicates that the remote device can be connected by Frame
Relay.
1
On the SNA Configuration menu (see Section 7.5.1, SNA
Configuration), select LLC-FR Switching Table.
™ The following prompt is displayed:
Empty LLC-FR Switching Table
Add LLC-FR Switching Table Entry
Enter Path Name(1 to 10 Characters): *
2
Type the Global Path Name and press Enter.
™ If you enter a name that is not already associated with a Global
Path, you are prompted to do so now:
Path Name Does Not Exist In GPT Table.
To Add Global Path Entry, Press 'Y'. Press Escape Otherwise.
BANDIT Products Software Configuration and Maintenance Guide
7-64
Chapter 7: Routing with Frame Relay, X.25, and SNA
3
Enter Y to open the Global Path option and configure a path with that
name. Press ESC to return to the GPT prompt and enter a different
name.
Note: You cannot save this configuration if a valid GPT Name has
not been entered.
Enter LLC Local MAC Address (6 Hex Digits): 00A0EB
4
As shown, 6 digits are automatically supplied for this address. Type
the additional 6 hexadecimal digits in the LLC Local MAC Address
(for a total of 12 digits), and press Enter.
™ The following prompt is displayed:
Enter LLC Local SAP Address(2 Hex Digits):
5
Type the 2-digit hexadecimal LLC Local SAP Address, and press
Enter.
™ The following prompt is displayed:
Enter BNN Local SAP Address(2 Hex Digits):
6
Type the 2-digit hexadecimal BNN Local SAP Address, and press
Enter.
™ The following prompt is displayed:
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
7-65
Enter FR Remote MAC Address (6 Hex Digits): 00A0EB
7
As shown, 6 digits are automatically supplied for this address. Type
the additional 6 hexadecimal digits in the Frame Relay Remote MAC
Address (for a total of 12 digits), and press Enter.
™ The following prompt is displayed:
Enter FR Remote SAP Address(2 Hex Digits):
8
Type the 2-digit hexadecimal Frame Relay SAP Address, and press
Enter.
™ The following prompt is displayed:
Enter BNN Remote SAP Address(2 Hex Digits):
9
Type the 2-digit hexadecimal BNN Remote SAP Address, and press
Enter.
™ The following prompt is displayed:
Enter Path Name (1 to 10 Characters):
10
Enter the Global Path Name and press Enter.
™ If you enter a name that is not already associated with a Global
Path, you are prompted to do so now:
BANDIT Products Software Configuration and Maintenance Guide
7-66
Chapter 7: Routing with Frame Relay, X.25, and SNA
Path Name Does Not Exist In GPT Table.
To Add Global Path Entry, Press 'Y'. Press Escape Otherwise.
11
Enter Y to open the Global Path option and configure a path with
that name. Press ESC to return to the GPT prompt and enter a
different name.
Note: You cannot save this configuration if a valid GPT Name has
not been entered.
™ The following prompt is displayed:
Enter Priority ( default = Medium )
for outgoing traffic on DLCI 17, port: Port 1
(1)
(2)
(3)
(4)
Immediate
High
Medium
Low
Enter Choice:
12
Select the priority level you want traffic on this path’s DLCI to have.
If you have no preference, use Medium (the default).
™ The following confirmation is displayed:
Priority set to Medium for DLCI 17 on port: Port 1
™ Next, the Enter XID prompt is automatically displayed,
indicating the only option currently available: End-to-End. The Endto-End option indicates that the XID is passed transparently and that
the unit does not interpret incoming XIDs.
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
Enter XID Option(1.End-to-End)
:
7-67
1
™ Then a confirmation indicates that an LLC-FR switching entry
has been added.
LLC-FR Switching Entry Added
™ A confirmation is displayed for the entries you have made in the
table.
A LLC Station Entry with Default Parameters
has been created for Port 1, DLCI 18.
To View/Modify the above LLC Station Entry,
Select "LLC Stations Table" from the "SNA Routing" Menu.
A LLC Station Entry with Default Parameters
has been created for Port E, DLCI 0.
To View/Modify the above LLC Station Entry,
Select "LLC Stations Table" from the "SNA Routing" Menu.
SAP 22 has been Added to the LLC Station for Port 1, DLCI 16.
SAP 22 has been Added to the LLC Station for Port E, DLCI 0.
Enter LLC Port Number(E-Ethernet):E
Enter LLC Local MAC Address(12 Hex Digits):
™ Then a prompt appears for another entry in the table.
Enter Path Name (1 to 10 Characters):
13
Do one of the following:
a
If you wish to add another record to the table, go to Step 2.
b
If you have finished adding records, press Escape.
BANDIT Products Software Configuration and Maintenance Guide
7-68
Chapter 7: Routing with Frame Relay, X.25, and SNA
™ The LLC–FR switching table is displayed.
Num LLC
Path Name
Local MAC
1
2
00A0EB000000
00A0EB000000
LLCFR
abc
LLC BNN
LSAP LSAP
0A
0A
0C
0C
Remote MAC
LLC BNN FR
RSAP RSAP Path Name
00A0EB000001
00A0EB000001
1A
1A
1C
1C
LLCFR
def
Prio XID
rity OPT
M
M
1
1
Add, Modify, or Delete an Entry? (Enter A, M, or D):
14
a
Do one of the following:
If you wish to add an another record, type a.
™ The following prompt appears. Go to Step 2.
Add LLC-FR Switching Table Entry
Enter Path Name (1 to 10 Characters):
b
To modify a record, type m and follow the directions on the screen.
c
To delete a record, type d and follow the directions on the screen.
d
If you have finished preparing the table, press Escape.
™ The following prompt is displayed. Then the SNA Configuration
menu is redisplayed. (See Section 7.5.1, SNA Configuration.)
LLC-FR Switching Table Handling Complete
7.5.1.3
SDLC–FR Switching Table
This option configures parameters for connecting SDLC devices to Frame
Relay SNA devices.
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
7-69
Note: The “FR” in this section indicates that the remote device can be
accessed through Frame Relay.
1
On the SNA Configuration menu (see Section 7.5.1, SNA
Configuration), select SDLC-FR Switching Table.
™ The following prompt is displayed:
Empty SDLC-FR Switching Table
Add SDLC-FR Switching Table Entry
Enter SDLC Port Number (S(SERIAL),E(EXPANSION),R = RDU Ports,1-24):
2
Type the SDLC port number you want to use, and press Enter.
™ The following prompt is displayed:
Enter SDLC Controller Address(2 Hex Digits):
3
Type the 2-digit hexadecimal SDLC Controller Address, and press
Enter.
™ The following prompt is displayed:
Enter SDLC Emulated MAC Address (6 Hex Digits): 00A0EB
4
As shown, 6 digits are already in place. Type the additional
6 hexadecimal digits in the SDLC Emulated MAC Address (for a
total of 12 digits), and press Enter.
™ The following prompt is displayed:
BANDIT Products Software Configuration and Maintenance Guide
7-70
Chapter 7: Routing with Frame Relay, X.25, and SNA
SDLC Emulated SAP Address(2 Hex Digits):
5
Type the 2-digit hexadecimal SDLC Emulated SAP Address, and
press Enter.
™ The following prompt is displayed:
Enter FR Remote MAC Address (6 Hex Digits): 00A0EB
6
As shown, 6 digits are already in place. Type the additional
6 hexadecimal digits in the Frame Relay Remote MAC Address (for
a total of 12 digits), and press Enter.
™ The following prompt is displayed:
Enter FR Remote SAP Address(2 Hex Digits):
7
Type the 2-digit hexadecimal Frame Relay Remote SAP Address,
and press Enter.
™ The following prompt is displayed:
Enter Path Name (1 to 10 Characters):
8
Type the Global Path Name and press Enter.
™ If you enter a name that is not already associated with a Global
Path, you are prompted add the path name:
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
7-71
Path Name Does Not Exist In GPT Table.
To Add Global Path Entry, Press 'Y'. Press Escape Otherwise.
9
Enter Y to open the Global Path option and configure a path with
that name. Or press ESC to return to the GPT prompt and enter a
different name.
Note: You cannot save this configuration if a valid GPT Name has
not been entered. For details of setting up a global path, see
Section 4.3, Defining Global Paths.
™ After you set up a path, the following prompt is displayed:
Enter Priority ( default = Medium )
for outgoing traffic on DLCI 16, port: Port 1
(1)
(2)
(3)
(4)
Immediate
High
Medium
Low
Enter Choice:
10
Select the priority level you want traffic on this DLCI to have. If you
have no preference, use Medium (the default).
™ A confirmation prompt, similar to the following, is displayed:
Priority set to Medium for DLCI 17 on port: Port 2
™ Then the next prompt is displayed.
BANDIT Products Software Configuration and Maintenance Guide
7-72
Chapter 7: Routing with Frame Relay, X.25, and SNA
Enter XID Option(1.End-to-End 2. Poll-FR 3. Resp-SDLC 4. Resp-FR):
a
Select one of the following options:
• The End-to-End option indicates that the XID is passed
transparently and that the unit does not interpret incoming XIDs.
• The Poll-FR option indicates that the unit initiates TEST/XID
polls to a Frame Relay device to start a connection. In the case of
SDLC terminal sessions, the SDLC terminal and Frame Relay host
are both in the listening mode. They require initiation by the unit.
(In the case of SDLC-to-SDLC connections using two BANDITs,
this may not be required.)
• The Resp-SDLC option enables the unit to spoof incoming SDLC
XID frames locally with the configuration’s XID string. This is
applicable only to SDLC host sessions.
• The Resp-FR option enables the unit to respond to incoming XID
frames with the configured XID string. This is useful in the case of
local devices that do not support XIDs.
™ If you selected End-to-End, go to the result after Step 12.
™ If you selected Poll-FR, Resp-SDLC, or Resp-FR, the following
prompt appears.
Enter the XID PU Type(1-PU1.0, 2-PU2.0):
11
The XID PU type is the physical unit (PU) associated with the
terminal device. This information is used in the unit-initiated XID
frames. Select the option you want to use.
™ The following prompt is displayed:
Enter XID String(8 Hex Digits):
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
12
7-73
The XID string is the exchange identifier information required for the
unit-initiated XID frames. Typically this is the block ID/node ID
information associated with a terminal device. Type the 8-digit
hexadecimal number for the XID string, and press Enter.
™ A confirmation is displayed for the record you just entered in the
SDLC–FR Switching Table. Then a message indicates that a record
has also been created in the LLC Stations Table.
SDLC-FR Switching Entry Added
A LLC Station Entry with Default Parameters
has been created for FR Path 'abcd'.
To View/Modify the above LLC Station Entry,
Select "LLC Stations Table" from the "SNA Routing" Menu.
SAP 0C has been Added to the LLC Station for FR Path 'abcd'.
™ Then a prompt appears for another entry in the SDLC–FR
Switching Table.
Enter SDLC Port Number (S(SERIAL),E(EXPANSION),R = RDU Ports,1-24):
13
Do one of the following:
a
If you wish to add another record to the table, go to Step 2.
b
If you have finished adding records, press Escape.
™ The SDLC–FR switching table is displayed.
Num SDLC SDLC
Port CU
1
S
0A
SDLC EMAC
00A0EB000000
SDLC
ESAP
0C
FR
RMAC
FR
FR
Prio XID PU XID
RSAP Path Name rity OPT Typ String
00A0EB000001 1A asd
H
1
NA
-NA-
Add, Modify, or Delete an Entry? (Enter A, M, or D):
BANDIT Products Software Configuration and Maintenance Guide
7-74
Chapter 7: Routing with Frame Relay, X.25, and SNA
14
a
Do one of the following:
If you wish to add an another record, type a.
™ The following prompt appears. Go to Step 2.
Add SDLC-FR Switching Table Entry
Enter SDLC Port Number (S(SERIAL),E(EXPANSION),R = RDU Ports,1-24):
b
To modify a record, type m and follow the directions on the screen.
c
To delete a record, type d and follow the directions on the screen.
d
If you have finished preparing the table, press Escape.
™ The following prompt is displayed. Then the SNA Configuration
menu is redisplayed. (See Section 7.5.1, SNA Configuration.)
SDLC-FR Switching Table Handling Complete
7.5.1.4
SDLC–LLC Switching Table
This option configures parameters for connecting SDLC devices to Token
Ring or Ethernet SNA devices.
Note: The “LLC” in this section refers only to Token Ring LLC.
1
On the SNA Configuration menu (see Section 7.5.1, SNA
Configuration), select SDLC-LLC Switching Table. The following
prompt appears:
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
7-75
Empty SDLC-LLC Switching Table
Add SDLC-LLC Switching Table Entry
Enter SDLC Port Number (S(SERIAL),E(EXPANSION),R = RDU Ports,1-24):
2
Type the SDLC Port Number you want to use, and press Enter.
™ The following prompt is displayed:
Enter SDLC Controller Address(2 Hex Digits):
3
Type the 2-digit hexadecimal SDLC Controller Address, and press
Enter.
™ The following prompt is displayed:
Enter SDLC Emulated MAC Address (6 Hex Digits): 00A0EB
4
As shown, the first 6 digits of this address are automatically supplied
Type the remaining 6 hexadecimal digits in the SDLC Emulated
MAC Address (for a total of 12 digits), and press Enter.
™ The following prompt is displayed:
Enter SDLC Emulated SAP Address (2 Hex Digits):
5
Type the 2-digit hexadecimal SDLC Emulated SAP Address, and
press Enter.
™ The following prompt is displayed:
BANDIT Products Software Configuration and Maintenance Guide
7-76
Chapter 7: Routing with Frame Relay, X.25, and SNA
Enter LLC Local MAC Address (6 Hex Digits): 00A0EB
6
As shown, the first 6 digits of this address are automatically supplied
Type the remaining 6 hexadecimal digits in the LLC Local MAC
Address (for a total of 12 digits), and press Enter.
™ The following prompt is displayed:
Enter LLC Local SAP Address(2 Hex Digits):
7
Type the 2-digit hexadecimal LLC Local SAP Address, and press
Enter.
™ The following prompt appears.
Enter Path Name (1 to 10 Characters):
8
Type the path name and press Enter.
Note: If you have not already created this path names, you are
prompted to do so now. For information on creating path names,
see Section 4.3, Defining Global Paths.
™ After the path information is completed, the following prompt is
displayed:
Enter XID Option(1.End-to-End 2. Poll-LLC 3. Resp-SDLC 4. Resp-LLC):
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
a
7-77
Select an option. (These options are discussed in Step 10a of
Section 7.5.1.3, SDLC–FR Switching Table.)
™ If you selected the End-to-End option, go to the result after
Step 10.
™ If you selected Poll-LLC, Resp-SDLC, or Resp-LLC, the
following prompt is displayed.
Enter the XID PU Type(1-PU1.0, 2-PU2.0, 4-PU4.0) :
9
Select the physical unit (PU) associated with the terminal device.
This information is used in the unit-initiated XID frames.
Enter XID String(8 Hex Digits):
10
Enter the 8-digit hexadecimal XID String and press Enter.
™ A confirmation is displayed for the entries you have made in the
SDLC-LLC Switching table. Another message indicates that a record
has also been created in the LLC Stations Table.
SDLC-LLC Switching Entry Added
A LLC Station Entry with Default Parameters
has been created for path "your entry path name"
To View/Modify the above LLC Station Entry,
Select "LLC Stations Table" from the "SNA Routing" Menu.
SAP 44 has been Added to the LLC Station for Path "your entry"
™ Then a prompt appears for another entry in the SDLC-LLC
Switching table.
BANDIT Products Software Configuration and Maintenance Guide
7-78
Chapter 7: Routing with Frame Relay, X.25, and SNA
Enter SDLC Port Number (S(SERIAL),E(EXPANSION),R = RDU Ports,1-24):
11
Do one of the following:
a
If you wish to add another record to the table, go to Step 2.
b
If you have finished adding records, press Escape.
™ The SDLC–LLC switching table is displayed.
Num SDLC SDLC
Port CU
1
S
0B
SDLC EMAC
00A0EB000000
SDLC
ESAP
0E
LLC LMAC
LLC LLC
LSAP Path Name
00A0EB000001 1E c
XID PU
OPT Typ
2
XID
String
1.0 0000A3D2
Add, Modify, or Delete an Entry? (Enter A, M, or D):
12
a
Do one of the following:
If you wish to add an another record, type a.
™ The following prompt appears. Go to Step 2.
Add SDLC-LLC Switching Table Entry
Enter SDLC Port Number (S(SERIAL),E(EXPANSION),R = RDU Ports,1-24):
b
To modify a record, type m and follow the directions on the screen.
c
To delete a record, type d and follow the directions on the screen.
d
If you have finished preparing the table, press Escape.
™ The following prompt is displayed. Then the SNA Configuration
menu is redisplayed. (See Section 7.5.1, SNA Configuration.)
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
7-79
DLC-LLC Switching Table Handling Complete
7.5.1.5
SDLC–QLLC Switching Table
This option allows you to create a routing table, that maps SDLC controller
addresses to QLLC paths. You can enter multiple addresses.
Note: Before you start, make certain you have configured a Path Name and
a Main Address in the Global Paths option on the Main Menu.
1
On the SNA Configuration menu (see Section 7.5.1, SNA
Configuration), select SDLC-QLLC Switching Table.
™ The following prompt is displayed:
Empty SDLC-QLLC Switching Table
Add SDLC-QLLC Switching Table Entry
Enter SDLC Port Number (S(SERIAL),E(EXPANSION),R = RDU Ports,1-24):
2
Type the physical port to which the SDLC device is connected, and
press Enter.
™ The following prompt is displayed:
Enter SDLC Controller Address(2 Hex Digits):
3
Type the control unit (CU) address of the SDLC device, and press
Enter.
™ The following prompt is displayed:
BANDIT Products Software Configuration and Maintenance Guide
7-80
Chapter 7: Routing with Frame Relay, X.25, and SNA
Enter QLLC Path Name (1 to 10 Characters):
4
Type the path name that you assigned to the destination X.25 QLLC
device (when you selected the Global Paths option on the Main
Menu), and press Enter.
™ The following prompt is displayed:
Enter QLLC Sub-Address (2 digits):
5
When DTEs are attached to a host device in the network, you must
assign a unique sub-address to each DTE. The sub-address can be up
to four digits in length and is appended to the main X.121 address,
which was assigned to the host device in the Global Paths option on
the Main Menu. Enter the sub-address assigned to the first DTE.
Note: All sub-addresses must have the same number of digits. If
the first sub-address assigned consists of 2 digits, then all subaddresses you assign must consist of 2 digits.
Let x represent the number of digits you use in assigning subaddresses. When a call is received, the system will look at the last x
digits in the address, and will check the sub-address for a match.
Note: When a complete address is received, you must check the
sub-address appended to the main address, and enter the subaddresses into the SNA Routing Table.
™ The following prompt is displayed:
Enter Call Initiator Type (1. No, 2. YES) :
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
6
7-81
The Call Initiator Type parameter specifies whether the unit will
initiate SVC call attempts. Select Yes (the unit will initiate) or No (the
unit will not initiate).
Note: If the unit is the Call Initiator, the unit will clear all calls
received from the destination device, using Cause 0 and
Diagnostic 97 codes (see Section 9.3.1, Cause and Diagnostic Codes).
™ The following prompt is displayed:
Enter XID Option(1.End-to-End 2. Poll-QLLC 3. Resp-SDLC 4. Resp-QLLC):
a
Select one of the following options:
• The End-to-End option indicates that the XID is passed
transparently and that the unit does not interpret incoming XIDs.
• The Poll-QLLC option indicates that the unit initiates XID polls to
a QLLC device after an X.25 connection is established. In the case
of SDLC terminal-to-LLC host sessions over QLLC, the SDLC
terminal and LLC host are both in the listening mode. They
require initiation by the unit. (In the case of SDLC-to-SDLC
connections using two BANDITs, this may not be required.)
• The Resp-SDLC option enables the unit to spoof incoming SDLC
XID frames locally with the configuration’s XID string. This is
applicable only to SDLC host sessions.
• The Resp-QLLC option enables the unit to respond to incoming
XID frames with the configured XID string. This is useful in the
case of local devices that do not support XIDs.
™ If you select End-to-End, proceed to the result after Step 8.
™ If you select Poll-QLLC, Resp-SDLC, or Resp-QLLC, the
following prompt is displayed:
BANDIT Products Software Configuration and Maintenance Guide
7-82
Chapter 7: Routing with Frame Relay, X.25, and SNA
Enter the XID PU Type(1-PU1.0, 2-PU2.0, 4-PU4.0) :
Note: The PU Type is the Physical Unit type associated with the
unit session from which XID polls or XID responses should be
initiated. This information is used in the unit-initiated XID frames.
7
Select the XID PU Type you want to use.
™ The following prompt is displayed:
Enter XID String(8 Hex Digits):
8
Type the 8-digit hexadecimal Exchange Identifier String and press
Enter.
Note: The Exchange Identifier is the node number/block number
combination that represents the SNA device corresponding to this
session. This information is used in the FRAD-initiated XID frames.
™ A confirmation is displayed for the record you have entered in
the SDLC–QLLC Switching Table.
SDLC-QLLC Switching Entry Added
™ Then a prompt appears for another entry in the table.
Enter SDLC Port Number (S(SERIAL),E(EXPANSION),R = RDU Ports,1-24):
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
9
7-83
Do one of the following:
a
If you wish to add another record to the table, go to Step 2.
b
If you have finished adding records, press Escape.
™ The SDLC–QLLC switching table is displayed.
Num
SDLC
Port
SDLC
CU
QLLC
PATH
QLLC
Addr
CALL
Initr
XID
OPT
PU
Type
XID
String
1
E
F
a
29
NO
3
4.0
0000ADB3
Add, Modify, or Delete an Entry? (Enter A, M, or D):
10
a
Do one of the following:
If you wish to add an another record, type a.
™ The following prompt appears. Go to Step 2.
Add SDLC-QLLC Switching Table Entry
Enter SDLC Port Number (S(SERIAL),E(EXPANSION),R = RDU Ports,1-24):
b
To modify a record, type m and follow the directions on the screen.
c
To delete a record, type d and follow the directions on the screen.
d
If you have finished preparing the table, press Escape.
™ The following prompt is displayed. Then the SNA Configuration
menu is redisplayed. (See Section 7.5.1, SNA Configuration.)
SDLC-QLLC Switching Table Handling Complete
BANDIT Products Software Configuration and Maintenance Guide
7-84
Chapter 7: Routing with Frame Relay, X.25, and SNA
7.5.1.6
LLC–QLLC Switching Table
Note: Before you start, the configure the local LLC device with the unit’s
MAC address, as the destination MAC address for connectivity with this
session.
In addition, the local LLC device must be configured with the destination
SAP address for connectivity with this session.
Make certain you have configured a path name in the Global Paths option
on the Main Menu.
1
On the SNA Configuration menu (see Section 7.5.1, SNA
Configuration), select LLC-QLLC Switching Table.
™ The following prompt is displayed:
Empty LLC-QLLC Switching Table
Add LLC-QLLC Switching Table Entry
Enter Path Name (1 to 10 Characters):
2
Type the path name and press Enter.
™ If the path does not already exist, you are asked to configure it.
See Section 4.3, Defining Global Paths.
™ After the path information has been completed, the following
prompt appears.
Enter LLC Local MAC Address (6 Hex Digits): 00A0EB
3
As shown, the first 6 digits of this address are automatically
supplied. Type the remaining 6 hexadecimal digits in the MAC
Address of the local LLC device (for a total of 12 digits), and press
Enter.
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
7-85
™ The following prompt is displayed:
Enter LLC Local SAP Address (2 Hex Digits):
4
Type the 2-digit hexadecimal SAP Address of the local LLC device,
and press Enter.
Note: The SAP address must be a non-null even two-digit
hexadecimal number.
™ The following prompt is displayed:
Enter QLLC MAC Address (6 Hex Digits): 00A0EB
5
As shown, the first 6 digits of this address are automatically
supplied. Type the remaining 6 hexadecimal digits in the MAC
Address of this unit (for a total of 12 digits), and press Enter.
™ The following prompt is displayed:
Enter QLLC SAP Address(2 Hex Digits):
6
Type the two-digit hexadecimal SAP Address assigned to this
session, and press Enter.
Note: The SAP address must be a two-digit non-null even
hexadecimal number.
™ The following prompt is displayed:
BANDIT Products Software Configuration and Maintenance Guide
7-86
Chapter 7: Routing with Frame Relay, X.25, and SNA
Enter QLLC Path Name(1 to 10 Characters):
7
Type the path name that you assigned to the destination X.25 QLLC
device (in the Global Paths option on the Main Menu), and press
Enter.
™ If the path does not already exist, you are asked to configure it.
See Section 4.3, Defining Global Paths.
™ After the path information has been completed, the following
prompt is displayed:
Enter QLLC Sub-Address(2 digits):
8
When DTEs are attached to a host device in the network, you must
assign a unique sub-address to each DTE. The sub-address can be up
to four digits in length and is appended to the main X.121 address,
which was assigned to the host device in the Global Paths option
from the Main Menu. Enter the sub-address assigned to the first DTE
and press Enter.
Note: All sub-addresses must have the same number of digits. If
the first sub-address assigned consists of two digits, then all subaddresses must consist of two digits.
Let x represent the number of digits you use in assigning subaddresses. When a call is received, the system will look at the last x
digits in the address, and will check the sub-address for a match.
Note: When a complete address is received, you must check the
sub-address appended to the main address, and enter the subaddresses into the SNA Routing Table.
™ The following prompt is displayed:
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
7-87
Enter XID Option(1. End-to-End 2. Poll-LLC 3. Poll-LLC-withLearned-Xid 4. Resp-LLC):
9
Select one of the following XID options:
• The End-to-End option indicates that the XID is passed
transparently and that the unit does not interpret incoming XIDs.
• The Poll-LLC option indicates that the unit initiates XID polls to a
LLC device after an X.25 connection is established. In the case of
SDLC terminal-to-LLC host sessions over QLLC, the SDLC
terminal and LLC host are both in the listening mode. They
require initiation by the unit. (In the case of LLC-to-LLC
connections using two units, this may not be required.)
• The Poll-LLC-with-Learned-XID option enables the unit to learn
about the XID string of the remote device over QLLC and use the
learned XID string in the XID polls initiated by the unit. This is
useful when a third-party QLLC terminal device across X.25 must
be connected with the local LLC host. In this case, the unit first
issues an XID command to the QLLC terminal and receives an XID
string in the XID response frame. This XID string is used in the
XID polls sent to the LLC host.
• The Resp-LLC option enables the unit to respond to incoming XID
frames with the configured XID string. This is useful to avoid XIDs
over QLLC.
™ If you select End-to-End or Poll-LLC-with-Learned-XID, proceed
to the result after Step 12.
™ If you selected Poll-LLC or Resp-LLC, the following prompt is
displayed:
Enter the XID PU Type(1-PU1.0, 2-PU2.0, 4-PU4.0) :
BANDIT Products Software Configuration and Maintenance Guide
7-88
Chapter 7: Routing with Frame Relay, X.25, and SNA
Note: The PU Type is the physical unit type associated with the
unit session from which XID polls or XID responses should be
initiated. This information is used in the unit-initiated XID frames.
10
Select the XID PU Type you want to use.
™ The following prompt is displayed:
Enter XID String(8 Hex Digits):
11
The Exchange Identifier is the Node number/Block number
combination that represents the SNA device corresponding to this
session. This information is used in the unit-initiated XID frames.
Type the 8-digit hexadecimal Exchange Identifier String and press
Enter.
™ The following prompt is displayed:
Enter Call Initiator Type (1. No,2. YES) :
12
The Call Initiator Type specifies whether the unit will initiate SVC
call attempts. Select Yes (the unit will initiate) or No (the unit will
NOT initiate).
Note: If the unit is the Call Initiator, the unit will clear all calls
received from the destination device, using Cause 0 and
Diagnostic 97 Codes.
™ A confirmation is displayed for the record you have entered in
the LLC–QLLC Switching Table. Another message indicates that a
record has also been entered in the LLC Stations Table.
BANDIT Products Software Configuration and Maintenance Guide
SNA Routing for 1490
7-89
LLC-QLLC Switching Entry Added
SAP 0A has been Added to the LLC Station for Path 'a'.
™ Then a prompt appears for another entry in the table.
Enter Path Name (1 to 10 Characters):
13
Do one of the following:
a
If you wish to add another record to the table, go to Step 2.
b
If you have finished adding records, press Escape.
™ The SDLC–QLLC switching table is displayed.
Num LLC
Prt
LLC MAC
1
00A0EB000000 0A
a
LLC QLLC MAC
SAP
QLLC QLLC
SAP PATH
00A0EB000001 0C
b
QLLC CALL XID PU
Addr Initr OPT Type
89
NO
1
NA
Add, Modify, or Delete an Entry? (Enter A, M, or D):
14
a
Do one of the following:
If you wish to add an another record, type a.
™ The following prompt appears. Go to Step 2.
Add LLC-QLLC Switching Table Entry
Enter Path Name (1 to 10 Characters):
b
To modify a record, type m and follow the directions on the screen.
BANDIT Products Software Configuration and Maintenance Guide
7-90
Chapter 7: Routing with Frame Relay, X.25, and SNA
c
To delete a record, type d and follow the directions on the screen.
d
If you have finished preparing the table, press Escape.
™ The following prompt is displayed. Then the SNA Configuration
menu is redisplayed. (See Section 7.5.1, SNA Configuration.)
LLC-QLLC Switching Table Handling Complete
7.5.1.7
LLC Stations Table
LLC Station Tables are automatically created with standard default values
when you enter information into the switching tables. However, this item on
the SNA Configuration menu allows you to change the entries you have
made, as well as the default values.
SNA 1490 supports independent LLC entities for each DLCI configured for
SNA traffic, enabling independent LLC configurations for each DLCI on any
Frame Relay port. Because of this LLC configuration, each DLCI can be
tuned according to the characteristics of any particular DLCI without
affecting SNA end devices. DLCIs are entered in the Global Paths Table and
are reflected in the LLC Path Name field.
1
On the SNA Configuration menu (see Section 7.5.1, SNA
Configuration), select LLC Stations Table.
™ The LLC Stations Table is displayed.
Entry Path
Name
1
2
3
b
a
c
LLC
Rx
Encap Wnd
BNN
802.2
802.2
7
7
7
Tx
Wnd
T1
Tmr
(1/100s)
T2
Tmr
(1/100s)
N2 Poll Inact Busy Rej
Cnt Tmr Tmr
Tmr Tmr
7
100
100
100
50
5
7
7
50
50
5
5
5
30
5
5
30
30
30
5
30
30
This table can only be auto created by SNA Switching table configuration
Modify or Delete an Entry? (Enter M or D):
2
Do one of the following:
BANDIT Products Software Configuration and Maintenance Guide
5
5
SNA Routing for 1490
a
7-91
Press Escape to return to the SNA Configuration menu.
™ The following prompt appears. Then the SNA Configuration
menu is redisplayed. (See Section 7.5.1, SNA Configuration.)
LLC Station Table Handling Complete
b
Select d to delete an entry. Follow the instructions on the screen.
c
Select m to modify an entry.
™ The following prompt appears.
Enter Number of Entry to be Modified:
3
Select the line to modify
™ The selected record’s list of fields and values is displayed.
1)
2)
3)
4)
5)
6)
7)
8)
a)
b)
c)
d)
LLC Path Name
:
LLC/FR Encapsulation
:
LLC Receive Window Size
:
LLC Transmit Window Size
:
LLC Acknowledge Timer T1(1/100 Seconds):
LLC Response Timer T2(1/100 Seconds)
:
LLC Maximum Retries N2
:
LLC P Timer (Seconds)
:
LLC Inactivity Timer (Seconds)
:
LLC Busy State Timer (Seconds)
:
LLC Reject Timer (Seconds)
:
LLC SAP Table Entry Under this Station
a
802.2
7
7
100
50
5
5
30
30
5
Enter Choice :
4
Select a parameter that you wish to modify.
BANDIT Products Software Configuration and Maintenance Guide
7-92
Chapter 7: Routing with Frame Relay, X.25, and SNA
Note: You cannot change the LLC Path Name, because it serves as
the index for the record.
™ A prompt is displayed for the selected parameter.
Enter LLC/FR Encapsulation(N (BNN), A (BAN)[N]
5
:
Select a value for the parameter (or press Escape to retain the current
value).
™ The record’s list of fields is redisplayed.
6
Do one of the following:
a
To modify another field, go to Step 4.
b
When you have finished configuring this record’s fields, press
Escape to return to the LLC Stations Table. Go to Step 2.
BANDIT Products Software Configuration and Maintenance Guide
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising