On Mon, Dec 06, 2004 at 01:41:26AM -0800, Vishwas Manral wrote: > Hi Remco/ Ben, > > A very interesting topic. > > How do we deal with MTU issues however, does it go up to 1526 now > (1518 to 1522 to 1526)? Seems there is strong interest in the > deployment of Q-in-Q however. There is no MTU issue. NICs usually don't complain about _sending_ oversized packets, and the outgoing packet size is all that the MTU setting on that system can and will affect. The issue is with _receiving_ oversized packets. And in that path the MTU of a system just doesn't matter. qinq will cause fewer cards to work, or require patching again, because the original problem of accepting oversized packets into the networking stack has returned, especially if using a new ethertype, since the card wont like dealing with them. //Peter
