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BGP error notification

Hello All,

Anyone having experience with this err-msg before:

%BGP-3-NOTIFICATION: received from neighbor x.x.x.x (open: unknown subcode) 3 bytes 000101

I tried to googling but can't find similar error message of: BGP (unknown subcode) 3 bytes 000101

If yes, could share what would this telling us?

Thanks :)

-Ananthan

  • WAN Routing and Switching
2 REPLIES
Cisco Employee

Re: BGP error notification

Hi,

What are the code/subcode related to this notification. It should be between the neighbor IP address and the "("

If it's 2/8, it means the peer doesn't support AFI/SAFI or BGP optional capability negotiation

HTH

Laurent.

New Member

BGP error notification

recently we encountered errors like this on our bgp session after enableing neighbor password, the problem was caused by incorect ip mtu settings on ends. we fixed it by setting the correct mtu size on both ends and/or by enabling gloabally under router bgp the bgp transport path-mtu-discovery.

regards,

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