OSPF on Nexus over vPC

[ThariqAli]

I am looking for documentation on configuring OSPF over vPC links across multiple Nexus switches running NXOS. Is it possible and/or recommended?

[Mark Elsen]

 - FYI : https://indeni.com/blog/how-to-use-cisco-nexus-osfp-over-vpc-review-cisco-nexus-osfp-vpc-implementation-verification/

 M.

[balaji.bandi]

check this guide : ( most nexus model should support)

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/interfaces/configuration/guide/b_Cisco_Nexus_9000_Series_NX-OS_Interfaces_Configuration_Guide_7x/b_Cisco_Nexus_9000_Series_NX-OS_Interfaces_Configuration_Guide_7x_chapter_0100...

https://bradhedlund.com/2010/12/16/routing-over-nexus-7000-vpc-peer-link-yes-and-no/

[ThariqAli]

As long as you configure the peer-gateway and layer3 peer-router under the vpc domain ID it will work....

[Carlos T]

Yes, I think if you have 2x /30 p2p subnets (for each vpc peer member), then it looks like it is not working, but if you have a single vlan /29, then it will work.

I see ospf adjacencies established when using 2x /30s, but when simulating failures and recovery of the vpc peers, some traffic is dropped. I think it is due to the ttl being decremented when crossing the vpc peer link.

[MHM Cisco World]

Make new post please if yoh have issue 

MHM