Hello Team
I am using VYOS version VyOS 1.1.7 and run BGP session.Suddenly BGP 1 of BGP session flapped and the BGP went down for almost 1 hour, and after 1 hour BGP session was established. I checked the logs, and find below message exact the same time BGP flapped.
Jun 17 17:58:02 RICTARTR bgpd[2424]: Y.Y.Y.101 unrecognized capability code: 70 - ignored
Can you advise on the solution to this issue, it happened 2 times in a period of 2months.
below is output of show ip bgp
sh ip bgp neighbors Y.Y.Y.Y
BGP neighbor is Y.Y.Y.Y, remote AS BBBB, local AS AAAA, external link
BGP version 4, remote router ID K.K.K.K
BGP state = Established, up for 1d18h54m
Last read 15:49:26, hold time is 180, keepalive interval is 60 seconds
Neighbor capabilities:
4 Byte AS: advertised and received
Route refresh: advertised and received(old & new)
Address family IPv4 Unicast: advertised and received
Message statistics:
Inq depth is 0
Outq depth is 0
Sent Rcvd
Opens: 3 1
Notifications: 0 1
Updates: 3 6
Keepalives: 19116 21029
Route Refresh: 0 0
Capability: 0 0
Total: 19122 21037
Minimum time between advertisement runs is 30 seconds
For address family: IPv4 Unicast
Inbound soft reconfiguration allowed
Community attribute sent to this neighbor(both)
Inbound path policy configured
Outbound path policy configured
Incoming update prefix filter list is *PEERB-PEERA-IN
Outgoing update prefix filter list is *PEERA-PEERB-OUT
1 accepted prefixes
Connections established 3; dropped 2
Last reset 1d18h54m, due to BGP Notification received
Local host: Y.Y.Y.Y.102, Local port: 39455
Foreign host: Y.Y.Y.Y.101, Foreign port: 179
Nexthop: Y.Y.Y.Y.102
Nexthop global: fe80::222:19ff:cebf:2612
Nexthop local: ::
BGP connection: non shared network
Read thread: on Write thread: off
regards,
Janvier R.