Logging Neighbor State Changes - Juniper BGP - CONFIGURATION GUIDE V 11.1.X Configuration Manual

Logging Neighbor State Changes

You can force BGP to log a message whenever a peer enters or leaves the Established
state.
bgp log-neighbor-changes
Use to associate a textual description of up to 80 characters with a BGP neighbor
or peer group.
If you specify a BGP peer group by using the peerGroupName argument, all the
members of the peer group inherit the characteristic configured with this
command unless it is overridden for a specific peer.
This command takes effect immediately.
Example
host1(config-router)#neighbor 10.11.0.5 description bostonmetropeer
Use the no version to remove the description.
See neighbor description
Use to log a notice message to the bgpNeighborChanges log when a neighbor
enters or leaves the Established state for any reason.
The severity of the log message is notice by default.
Issue the log destination console severity notice command to display the
messages on the console.
This command takes effect immediately.
Example
host1:3(config)#bgp log destination console severity notice
host1:3(config)#router bgp 100
host1:3(config-router)#bgp log-neighbor-changes
NOTICE 04/30/2001 21:06:22 bgpNeighborChanges (3,4.4.4.4): peer 4.4.4.4
in core leaves established state
NOTICE 04/30/2001 21:06:22 bgpNeighborChanges (3,5.5.5.5): peer 5.5.5.5
in core leaves established state
NOTICE 04/30/2001 21:06:22 bgpNeighborChanges (3,6.6.6.6): peer 6.6.6.6
in core leaves established state
NOTICE 04/30/2001 21:06:22 bgpNeighborChanges (3,13.13.13.1): peer
13.13.13.1 in core leaves established state
NOTICE 04/30/2001 21:06:31 bgpNeighborChanges (3,4.4.4.4): peer 4.4.4.4
in core enters established state
NOTICE 04/30/2001 21:06:31 bgpNeighborChanges (3,5.5.5.5): peer 5.5.5.5
in core enters established state
NOTICE 04/30/2001 21:06:31 bgpNeighborChanges (3,6.6.6.6): peer 6.6.6.6
in core enters established state
NOTICE 04/30/2001 21:06:31 bgpNeighborChanges (3,13.13.13.1): peer
13.13.13.1 in core enters established state
Chapter 1: Configuring BGP Routing
Configuring BGP Peer Groups
29