Enabling Lenient Behavior

You can use the neighbor lenient command to enable the BGP speaker to attempt to recover from malformed packet errors and finite state machine errors generated by a peer. If BGP can recover from the error, it logs a warning message and attempts to maintain the session with the peer. The normal, nonlenient behavior is for the BGP speaker to send a notification message to the peer generating the error and to terminate the session. By default, lenient behavior is disabled.

neighbor lenient

• Use to enable a BGP speaker to be more tolerant of some errors generated by a peer, such as malformed BGP messages or finite state machine errors.
• The speaker attempts to recover from the errors and avoid bringing down the BGP session with the peer.
• Lenient behavior is disabled by default.
• Example

  host1(router-config)#neighbor 10.12.45.23 lenient

• Use the no version to restore the default condition, disabling lenient behavior.
• See neighbor lenient.

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