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Routing over VPC

ar
Level 1
Level 1

I have Nexus 9500s and 9300s.

VPC enabled.

A router below is dual-homed to the 9300s

L2 Path is provided via VPC from N9300 to N9500.

Since N9500 is the L2/L3 boundary, I would like to establish IGP adjacency as below.

Is this  topology/deployment supported?

How will be the behavior of OSPF neighbors, failover in this case?

Please advise, thanks

2 Replies 2

willwetherman
Spotlight
Spotlight

Hi,


I suspect that this is not supported based on the following document.

http://www.cisco.com/c/en/us/support/docs/ip/ip-routing/118997-technote-nexus-00.html

If you look at 'Table 2: Routing Protocols Adjacencies Support over vPC VLANs' it states that adjacencies from vPC attached devices L3-B and L3-C to Nexus-A and Nexus-B is not supported. It doesn’t provide an example similar to yours but I'm guessing it’s still not supported as the communication will still be over a vPC VLAN.


I've not had to implement a topology like this before so someone else will need to advise if this is possible or not.

Hello,

By Enhanced VPC, your scenario was supported if you had nexus 5K and FEX; however, I believe, 9300s should be also VPC peers in this case.

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