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v A long-term condition, the Frame Relay protocol will set the transmit rate for the
affected PVCs to the calculated minimum information rate.
v Facility or equipment failure or maintenance action, or if the CIR was configured
as zero, the FR protocol will continue to transmit any queued data for the
affected PVCs but will not accept any more outgoing packets from the upper
layer protocols until the congestion condition is cleared.
Once a CLLM message for a PVC has been received, if the device does not
receive any CLLM messages or BECNs within the
Ty
timer period or if a frame
without a BECN is received, the device will consider the congestion condition
cleared and gradually return the PVC to its configured transmission rates. If you are
using CLLM to control congestion, you must not configure DLCI 1007 for any other
use.
Bandwidth Reservation over Frame Relay
For information on bandwidth reservation over Frame Relay, refer to Using
Bandwidth Reservation and Priority Queuing and Configuring and Monitoring
Bandwidth Reservation in
Using and Configuring Features
.
Displaying the Frame Relay Configuration Prompt
To access the Frame Relay configuration environment:
1. At the OPCON prompt (*), type talk 6.
2. At the configuration prompt (Config>), enter the list devices command to see a
list of interfaces configured on the router.
3. Enter the network command to display the Frame Relay configuration prompt.
The network number is the number of the Frame Relay interface.
Config>network
What is the network number [0] 2
Frame Relay user configuration
FR 2 Config>
4. At the Frame Relay interface configuration prompt (FR Config>), use the
commands discussed in this chapter to configure Frame Relay parameters.
Frame Relay Basic Configuration Procedure
This section outlines the minimum configuration steps that you are required to
perform to get the Frame Relay protocol up and running. If you desire any further
configuration information and explanation, refer to the configuration commands
described in this chapter.
Note: You must restart the router for new configuration changes to take effect.
v Select FR management. The FR Local Management Interface (LMI) protocol
defaults to ANSI. You have the option of connecting to a network using the
Interim LMI (REV1), ANSI T1.617 Annex D management, or ITU-T/CCITT Q.933
Annex A management. Use the enable and set commands to enable and set the
required management.
v Add a PVC. Add any required PVCs that are needed if FR management is
disabled or orphan circuits are disabled. If you want to bridge over a FR PVC, or
if you want to run APPN over a FR PVC, you also must configure that PVC. Use
the add permanent-virtual-circuit command.
Using Frame Relay
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MRS V3.2 Software User’s Guide