We have a point to point 100MG connection between a 6509 gig interface and a 3750G-48TS Gig interface.
Its a basic point o point but the OSPF fails to load and gets stuck in Exchange/DR as below.
The circuit has been tested by the provider and they have said that there are no issues and MTU has been set correctly to 1500.
Has anyone come across this problem before and how we can over come this ?
Neighbor ID Pri State Dead Time Address Interface
10.137.243.1 1 EXCHANGE/DR 00:00:14 10.128.0.173
by setting a lower ip mtu on the C6509 side you can be sure that is not trying to build a packet that is bigger then 1500.
mtu-ignore disable a check but doesn't influence the size of packets that are sent out the interface
you may combine
ip ospf mtu-ignore on 3750 side
ip ospf mtu-ignore
ip mtu 1400
on c6509 and see what happens
Hope to help