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BGP Networks not advertising after an adjacency failure

We have had some BGP adjacency failures and not all network advertisements recover. The neighbor recovers in about 9 seconds but one network does not recover properly. It still shows up in the routing table but we cannot get access to the far end devices until we do a shut, no shut on the internal gig interface. At no time does any of the circuits or links go down. This is a multi-homed environment on two different providers.   

router bgp 65000

bgp log-neighbor-changes

network mask

network mask

timers bgp 5 15

neighbor remote-as 65001

neighbor description local router

neighbor ebgp-multihop 255

neighbor soft-reconfiguration inbound

neighbor route-map RM--CC out

neighbor remote-as 65000

neighbor update-source Loopback0

neighbor next-hop-self

neighbor soft-reconfiguration inbound

May 30 12:15:42.351 EDT: %BGP-5-ADJCHANGE: neighbor Down BGP Notification sent

May 30 12:15:42.351 EDT: %BGP-3-NOTIFICATION: sent to neighbor 4/0 (hold time expired) 0 bytes

May 30 12:15:42.354 EDT: %BGP_SESSION-5-ADJCHANGE: neighbor IPv4 Unicast topology base removed from session  BGP Notification sent

May 30 12:15:51.423 EDT: %BGP-5-ADJCHANGE: neighbor Up

The will not recover but the will.

4 Replies 4

Giuseppe Larosa
Hall of Fame
Hall of Fame

Hello Douglas, is likely the IP address of the loop0 on the local node.

How is 10.0/16 learned by the node?

there is a static route for IP prefix 10.0/16 pointing to the internal interface?

Is learned by an IGP?

Hope to help


The is the loopback

There is a corresponding 10.0/16 static route pointing back to internal Interface.

Also this has been up and running without issue for a year.

But this same exact incident has happened twice in the last two weeks. No config changes have been made.

Have you ever heard of anything like this?

When checking the bgp advertized routes, is the missing route listed?

If the other side also has soft reconfiguration enabled, you may try a soft reset.

clear ip bgp soft out

Alternatively, there is this link:

Hope this helps.



The missing route is listed, but it doesn't work. once we do a shut, no shut, the network entry "restarts" and in the routing table it restarts the time of the route addition. see below

B [20/0] via, 1d01h

B [20/0] via, 1d02h

B [20/0] via, 1d02h

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