Nexus VPC and BGP routing (Nexus acting as BGP peer)

[from88]

Hello,

I wanted to clarify. We're planning to use Nexus switches as a BGP peers for a servers connected via VPC port-channel.

As I know routing in the VPC domain always was a tricky thing. Now i know that there're things like layer3 peer-router function and etc.

Currently im interested in Nexuses like 9300, 5672UP, 5548UP. Maybe you know - is there any noticable caveats ? That i should consider before running BGP to some Kubernetes routers ? (Calico project)

[Paul Zimmerman]

I'm no expert here, but I consulted with the developer advocate in this area and he told me this...

This is a good place to start — https://www.cisco.com/c/en/us/support/docs/ip/ip-routing/118997-technote-nexus-00.html

It provides caveats and supported code.

Also — while it may be supported — there may be weird oddities that pop up. He found from running things like MetalLB on top of calico — there were some caveats for running BGP for host-route injection

So its not just the k8s overlay — but any services that would be peering in the overlay to the network infra.