On Tuesday, November 25, 2014 08:28:27 PM [email protected] wrote: > The first five IS-IS hellos are still padded to the full > MTU size and subsequent hellos are not once the > adjacency is formed... this is to detect MTU mismatches. > If you cannot fix the MTU mismatch for some reason, you > can also work around it by setting the clns mtu size to > match on both sides which should also work. I would > recommend setting the physical MTU of the interface to > what is supported on the link, though. I'm not familiar > with IOS-XE, but I know IOS-XR and IOS need to have > their MTU's adjusted accordingly, which means they won't > be the same numeric value. Someone more familiar with > IOS-XE may know if this is also an issue or not.
IOS and IOS XE will have the same MTU. IOS XR will be whatever IOS and IOS XE is + 14 bytes (Ethernet). Mark.
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