Configuring System Logging of BGP Peer State Transitions
Whenever a BGP peer makes a state transition, you can configure BGP so that it generates a syslog message. To do this, include the log-updown statement:
For a list of hierarchy levels at which you can include this statement, see the statement summary section for this statement.
 | Note: Enabling the log-updown statement causes BGP state transitions to be logged at warning level. |
