I have a C6500 (SUP720+FWSM(IOS 3.1.5)).
Between the SUP and FWSM I have configured interface VLAN50 and enable OSPF on this interface subnet.Everything is working well.Then I upgrade first to 3.1.8 and then to 3.2.4 , with the same configuration on SUP and FWSM and the OSPF process does not get UP.On the SUP debug, I see that it send hello packets to FWSM, no reply.From FWSM I get at debug: "OSPF: Input packet ignored.".L3 connection exist between FWSM and SUP (I can ping each other).The access-list are unmodified, like in 3.1.5, so traffic is allowed.
I believe that I have some mistake.
Can you help me with an advice?