BGP FLAPPING

[amit.gaur]

Hello All ,

Kindly help me to investigate below log on our CE router :-

Sep 20 21:42:10.103: %BGP-5-ADJCHANGE: neighbor 57.35.200.33 Down BGP Notification sent
Sep 20 21:42:10.103: %BGP-3-NOTIFICATION: sent to neighbor 57.35.200.33 4/0 (hold time expired) 0 bytes
Sep 20 21:42:10.123: %BGP_SESSION-5-ADJCHANGE: neighbor 57.35.200.33 IPv4 Unicast topology base removed from session  BGP Notification sent
Sep 20 21:43:28.535: %SSH-4-SSH2_UNEXPECTED_MSG: Unexpected message type has arrived. Terminating the connection

Regards,

Amit Gaur

[Cisco Freak]

Can you please post your configs?

The BGP session flaps due to expired hold timer. Is there any config that blocks BGP hello packet exchange?  Is there any MTU mismatch between interfaces?

CF