In article <5.1.0.14.2.20010823102412.01d94dd0@10.30.15.2>, RJ Atkinson <rja@inet.org> wrote:
At 10:18 23/08/01, John Kristoff wrote:
Certainly. In a nutshell, it might be best to take steps to avoid fragmentation elsewhere in the network. Perhaps a rule of thumb that should be stressed is to use jumbo frames if you know for sure the other end system(s) support it, otherwise default to 1500.
Or just use Path MTU Discovery.
Ofcourse, for path MTU discovery to work, a router must know that the outgoing link has a smaller MTU than the packet so that it can send back an ICMP error to the sender. On a GigE interface with jumbo frames where the other side on the same ethernet might not support jumbo frames that is probably not the case. The packet will simply get dropped and the sender will never know why it was dropped. Mike. -- "Answering above the the original message is called top posting. Sometimes also called the Jeopardy style. Usenet is Q & A not A & Q." -- Bob Gootee