Description

Router A and B connected with a single link and is having Multi Hop BFD session for IBGP. 

BFD is down due to Router A is showing local diag as Nbrsignal and Router B as AdminDown

Symptoms

Router A BFDD_STATE_UP_TO_DOWN: BFD Session 192.168.1.2 (IFL 354) state Up -> Down LD/RD(26/31) Up time:3d 11:48 Local diag: NbrSignal Remote diag: AdminDown Reason: Received ADMINDOWN from PEER.

Router B bfdd[20613]: BFDD_STATE_UP_TO_DOWN: BFD Session 192.168.1.1 (IFL 420) state Up -> Down LD/RD(31/26) Up time:3d 11:48 Local diag: AdminDown Remote diag: None Reason: Received Upstream Destroy Session

Solution

•    Router A is showing its Local diagnostic as NbrSignal and the down reason as Received ADMINDOWN from PEER.
•    Router B says it’s Local Diag as AdminDown, and down Reason shows as Upstream Destroy Session
•    So, we can conclude that Router A brought down the session as there is a BFD config change on router B

Modification History

No modification is done for this issue.