On 01/22/2014 03:01 AM, Robert Collins wrote:
I certainly think having the MTU set to the right value is important. I wonder if there's a standard way we can signal the MTU (e.g. in the virtio interface) other than DHCP. Not because DHCP is bad, but because that would work with statically injected network configs as well.
Can LLDP be used here somehow? It might require "stretching" things a bit - not all LLDP agents seem to include the information, and it might require some sort of "cascade." It would also require the VM to pay attention to the frames as they arrive, but in broad, hand-waving, blue-sky theory it could communicate maximum frame size information within the broadcast domain.
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