Selective Disabling Of Nack Messaging; Verifying Srp Configuration; Modifying The Source Context For Icsr; Configuring Bgp Router And Gateway Address - Cisco ASR 5000 Administration Manual

Interchassis Session Recovery

Selective Disabling of NACK Messaging

The NACK mechanism sends a NACK message for any ICSR checkpoint failure on the standby chassis.
Every NACK sent from the standby chassis triggers a full checkpoint from the active chassis.
If the micro-checkpoint is failing continuously and sending NACKs, the active chassis keeps sending
full-checkpoints. This increases SRP bandwidth.
CLI commands allow an operator to selectively disable and re-enable NACK messages for specific
micro-checkpoints.
The Exec mode srp disable nack micro-chkpt-cmd disables the sending of a NACK from the standby chassis.
srp disable nack micro-chkpt-cmd chkpt_number
chkpt_number specifies the checkpoint number to be disabled as an integer from 1 through 255. You can
obtain checkpoint numbers (CMD IDs) from the output of the show srp checkpoint info command.
You can re-enable the micro-checkpoint using the srp enable nack micro-chkpt-cmd command.
srp enable nack micro-chkpt-cmd chkpt_number

Verifying SRP Configuration

Verify that your SRP contexts were created and configured properly by running the show srp info command
(Exec Mode) on each chassis.

Modifying the Source Context for ICSR

To modify the source context of core service:
Step 1 Add the Border Gateway Protocol (BGP) router AS-path and configure the gateway IP address, neighbor IP address,
remote IP address in the source context where the core network service is configured, by applying the example
configuration in
Step 2 Configure the service redundancy context with the BGP neighbor context and IP address to monitor the BGP link activity
by applying the example configuration in
Step 3 Verify your BGP context configuration by following the steps in
Step 4 Save your configuration as described in Verifying and Saving Your Configuration.

Configuring BGP Router and Gateway Address

Use the following example to create the BGP context and network addresses.
configure
context source_ctxt_name
no checkpoint session periodic-interval
end
Configuring BGP Router and Gateway Address, on page
Configuring the SRP Context for BGP, on page
router bgp AS_num
Modifying the Source Context for ICSR
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Verifying BGP Configuration, on page
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