On Wed, Dec 03, 2014 at 10:56:02AM -0800, Rick Jones wrote: > Trying to "fake-out" an ICMP message to paper-over "devices" in the "middle" > of same Layer2 network having different MTUs from the ends goes back to at > least the days when people started joining FDDI networks to Ethernet > networks with bridges rather than routers. Perhaps back even further. It > had problems them (including not all traffic being IP), I doubt today would > be any different. > > All devices in a Layer2 network must have the same MTU. (*) > > The only exception to that which does not lead one down a rathole is that > you can have the MTU at the "edges" of the Layer 2 network be smaller than > the MTU in the "middle." And then only if the middle "never" tries to talk > itself to the edges directly. > > rick jones > > (*) Or at least any communicating device must be kept ignorant of what one > does to have a smaller MTU in there somewhere.
What I've been pointing out is that just because something is within a VM, we can't assume it's an edge. -- MST _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
