BGP idle due to No outgoing interface

[ICANG]

Hi all,

On Nexus switch bgp stuck in idle due to "no outgoing interface". There is a ping to bgp peer (VIP IP). BFD to VM that's in front of the peer is UP. What could be the issue ? Debug logs are below

BGP state = Idle (No outgoing interface)




Debug

(ABC) EVT: 10.115.12.8 remote iod 0 skip resolving l3 addr
(ABC) EVT: 10.115.12.8 peer connection retry timer expired
(ABC) EVT: Single hop EBGP peer 10.115.12.8 not directly attached (active), outbound interface Unknown
(ABC) EVT: Starting timer (5 sec 0 nsec) for 10.115.12.8 connection retry




Routing
10.115.12.8/32, ubest/mbest: 1/0
*via 10.115.17.2, Vlan1650, [1/0], 21:18:13, static




Ping to VIP IP

--- 10.115.12.8 ping statistics ---
5 packets transmitted, 5 packets received, 0.00% packet loss
round-trip min/avg/max = 0.45/0.526/0.741 ms

[Giuseppe Larosa · Accepted solution]

Hello @ICANG ,

it is an eBGP peer so the default TTL for BGP packets is 1

(ABC) EVT: Single hop EBGP peer 10.115.12.8 not directly attached (active), outbound interface Unknown

you need to add under router bgp

neighbor 10.115.12.8 ebgp-multihop 2

Note:

a similar comand is needed also on the EBGP peer

Hope to help

Giuseppe

[balaji.bandi]

Personally  top of my head i do not believe that work with VIP IP - you need to peer with L3 Interface IP .

change the peer IP L3 IP (instead of VIP ?)