Juniper JUNOSE 11.2.X BGP AND MPLS, Configuration Manual

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This command takes effect immediately.
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Example
host1(config-router)# neighbor 10.11.0.5 description bostonmetropeer
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Use the no version to remove the description.
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See neighbor description
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
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Use to log a notice message to the bgpNeighborChanges log when a neighbor enters
or leaves the Established state for any reason.
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The severity of the log message is notice by default.
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Issue the log destination console severity notice command to display the messages
on the console.
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This command takes effect immediately.
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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
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Use the no version to stop logging.
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See bgp log-neighbor-changes
Specifying a Source Address for a BGP Session
By default, BGP uses the IP address of the outgoing interface toward the peer as the
source IP address for the TCP connection over which the BGP session runs. If the outgoing
interface goes down, the BGP session is dropped because the IP source address is no
Copyright © 2010, Juniper Networks, Inc. 30
JunosE 11.2.x BGP and MPLS Configuration Guide