Comment 9 for bug 1242534

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Ian Wells (ijw-ubuntu) wrote :

Note that (pedantically) network_device_mtu wants to be 1 encap less than the *minimum* MTU in your cluster, because that is the *maximum* MTU of any packet you can guarantee to be able to forward. That's not necessarily same as 1 encap less than the local MTU; it may be smaller.

Encaps are weird.