Cisco Systems IOS XR User Manual download pdf (Page 83)

Implementing BGP on Cisco IOS XR Software

How to Implement BGP on Cisco IOS XR Software

RC-67

Cisco IOS XR Routing Configuration Guide

Configuring Software to Store Updates from a Neighbor

Perform this task to configure the software to store updates received from a neighbor.

The soft-reconfiguration inbound command causes a route refresh request to be sent to the neighbor if

the neighbor is route refresh capable. If the neighbor is not route refresh capable, the neighbor must be

reset to relearn received routes using the clear /jointfilesconvert/86220/bgp soft command. See the “Resetting Neighbors Using

BGP Dynamic Inbound Soft Reset” section on page RC-71.

Note Storing updates from a neighbor works only if either the neighbor is route refresh capable or if the

soft-reconfiguration inbound command is configured. Even if the neighbor is route refresh capable and

the soft-reconfiguration inbound command is configured, the original routes are not stored unless the

always option is used with the command. The original routes can be easily retrieved with a route refresh

request. Route refresh sends a request to the peer to resend its routing information. The

soft-reconfiguration inbound command stores all paths received from the peer in an unmodified form

and refers to these stored paths during the clear. Soft reconfiguration is memory intensive.

SUMMARY STEPS

1. configure

2. router /jointfilesconvert/86220/bgp autonomous-system-number

3. neighbor ip-address

Step 6

send-community-e/jointfilesconvert/86220/bgp

Example:

RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp-nbr-af)#

send-community-e/jointfilesconvert/86220/bgp

Specifies that the router send community attributes (which

are disabled by default for eBGP neighbors) to eBGP

neighbor 172.168.40.24 for IPv4 multicast routes.

Step 7

end

commit

Example:

RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp-nbr-af)# end

RP/0/RP0/CPU0:router(config-/jointfilesconvert/86220/bgp-nbr-af)# commit

Saves configuration changes.

• When you issue the end command, the system prompts

you to commit changes:

Uncommitted changes found, commit them before

exiting(yes/no/cancel)?

[cancel]:

–

Entering yes saves configuration changes to the

running configuration file, exits the configuration

session, and returns the router to EXEC mode.

–

Entering no exits the configuration session and

returns the router to EXEC mode without

committing the configuration changes.

–

Entering cancel leaves the router in the current

configuration session without exiting or

committing the configuration changes.

• Use the commit command to save the configuration

changes to the running configuration file and remain

within the configuration session.

Command or Action Purpose

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Cisco Systems IOS XR User Manual Page 83

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