02-11-2017 09:22 AM - edited 03-08-2019 09:17 AM
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
02-12-2017 02:22 PM
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.
02-12-2017 08:23 PM
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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