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Implementing BGP on Cisco IOS XR Software
How to Implement BGP on Cisco IOS XR Software
RC-34
Cisco IOS XR Routing Configuration Guide
Logging Neighbor Changes
Logging neighbor changes is enabled by default. Use the log neighbor changes disable command to
turn off logging. The log neighbor changes disable command can also be used to turn logging back on
if it has been disabled.
Adjusting BGP Timers
Perform this task to set the timers for BGP neighbors.
BGP uses certain timers to control periodic activities, such as the sending of keepalive messages and the
interval after which a neighbor is assumed to be down if no messages are received from the neighbor
during the interval. The values set using the timers bgp command can be overridden on particular
neighbors using the timers command in the neighbor configuration mode.
SUMMARY STEPS
1. configure
2. router bgp autonomous-system-number
3. timers bgp keepalive hold-time
4. neighbor ip-address
5. timers keepalive hold-time
6. end
or
commit
DETAILED STEPS
Command or Action Purpose
Step 1
configure
Example:
RP/0/RP0/CPU0:router# configure
Enters global configuration mode.
Step 2
router bgp
autonomous-system-number
Example:
RP/0/RP0/CPU0:router(config)# router bgp 120
Enters BGP configuration mode allowing you to configure
the BGP routing process.
Step 3
timers bgp
keepalive hold-time
Example:
RP/0/RP0/CPU0:router(config-bgp)# timers bgp 30
90
Sets a default keepalive time of 30 seconds and a default
hold time of 90 seconds for all neighbors.