internal networks unreachable if iBGP neighbor wan goes down
I have 2 Nexus 5000's as iBGP neighbors, both have their own wan access, if wan goes down on one of the nexus, I loose access to internal networks even from neighbor router with active wan, I can only ping physical interfaces on the nexus.
Re: internal networks unreachable if iBGP neighbor wan goes down
Thanks for these.
I can see in the show ip bgp outputs that the ibgp path to all destinations is using the next-hop address of the opposite N5ks WAN connection. For example dist-1 is using next-hop address 10.50.132.18 which is the WAN connection for dist-2. For BGP to consider a path valid, the router must be able to route to the advertised next-hop addess.
Can you check if dist-1 has a route for 10.50.132.18 this address in its local RIB?
The normal way to resolve this issue is to set 'next-hop-self' for the iBGP connection on both N5ks or advertise the WAN next hop addresses into IGP.
I can see in the BGP configuation that an iBGP peer-policy has been configured with next-hop-self but it doesnt appear to be applied.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...