Posts Tagged ‘ignore’

Mar
30

OSPF and MTU Mismatch

Dear Brian,

What is the difference between using the “system mtu routing 1500” and the “ip ospf mtu-ignore” commands when running OSPF between a router and a switch?

Thanks,

Paul

Hi Paul,

Within the scope of the CCIE Lab Exam, it may be acceptable to issue either of these commands to solve a specific lab task. However, it is key to note that there is a difference between ignoring the MTU for the purpose of OSPF adjacency and matching the MTU within a real production network.

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