OSPF interoperability between Brocade, NX-OS, and IOS

[heath762]

I have a question about interoperability of OSPF between Cisco and non-cisco devices.  Is there a need for rfc1583compatibility between any of them?

[Reza Sharifi]

That should work by default as all software vendors support OSPF ver 2.

HTH

[heath762]

What could be the outcome of setting this on a nexus device if not needed?  

[Reza Sharifi]

Have a look at this document:

https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/117824-config-ospf-00.html

HTH

[heath762]

I saw that document, thanks though.  I am trying to failover to a different device using ospf costs.  ipv6 works fine and as expected.  ipv4 ospf appears to work fine, however, packets are lost.  The default route changes to the expected path when costs are changed throughout my network.  However pings from outside my network fail, and also pings from my network to the internet fail.  The only thing i cannot explain is why rfccompatibilty is applied to the router config.  Could this rfccompatibility command cause slow convergence or packet loss??

[heath762]

I see this strange ospf issue between nexus 5k and 7k and brocade MLX

[heath762 · Accepted solution]

Update:

It was not the rfccompatibility command that was causing the issue.  

More Information:

The device having issue was working as expected with regards to ospf and routing.  Traffic was migrated to the backup router.  The primary router was upgraded from NX-OS 6.2 to 8.2.  The issue began when traffic was migrated back to the primary router after the upgrade. 

Further investigation proved ospf and cef were correct on all routers when traffic was migrated from backup to primary path, however traffic did not flow.

More investigation proved the issue was caused by unexpected behavior from WCCP, which worked prior to the upgrade.  The configuration for WCCP was removed and everything worked as expected.