@ Nagendra You only discussed what's happening but you didn't mention a solution. How do we resolve this? I'm also getting EXSTART to DOWN. I have 9100 ip mtu configured on both ends (one Cisco and one is a different vendor). When I configure ip mtu-ignore, the OSPF neighborship comes but, but I don't want to use mtu-ignore. Why can't one of the routers process a 9100 mtu packet?
... View more