BGP flaps frequently

[Ramz PV]

Hi,

         I'm getting below logs in my router frequently and BGP flaps. could someone tell me what are the possible causes of this issue.

Oct 2 02:33:50: %BGP-3-NOTIFICATION: received from neighbor 192.168.181.217 4/0 (hold time expired) 0 bytes

Oct 2 02:33:50: %BGP-5-ADJCHANGE: neighbor 192.168.181.217 Down Peer closed the session

Oct 2 02:33:50: %BGP_SESSION-5-ADJCHANGE: neighbor 192.168.181.217 IPv4 Unicast topology base removed from session  Peer closed the session

Oct 2 02:33:57: %BGP-5-ADJCHANGE: neighbor 192.168.181.217 Up

Oct 2 03:35:52: %BGP-3-NOTIFICATION: received from neighbor 192.168.181.217 4/0 (hold time expired) 0 bytes

Oct 2 03:35:52: %BGP-5-ADJCHANGE: neighbor 192.168.181.217 Down Peer closed the session

Oct 2 03:35:52: %BGP_SESSION-5-ADJCHANGE: neighbor 192.168.181.217 IPv4 Unicast topology base removed from session  Peer closed the session

Oct 2 03:36:03: %BGP-5-ADJCHANGE: neighbor 192.168.181.217 Up

[cperroquin]

Hello,

- Many potential issue... 

- Is it EBGP or IBGP?

- May be hold-time too short.

- May be overload CPU.

- May be inconsistent Keepalive/hold time.

- May be network flapping in the middle...

C.