[...]ben soo wrote:
[...]This last might be an artifact caused by the firewall, i dunno.
Bill Davidsen <davidsen@xxxxxxx> wrote:[...]Yes, I have found that I get far less problem in this area leaving the MTU at 1500, then putting a larger MTU (usually 9000) into the routing table for segments, or even just machines, where I know there is direct connectivity.
If you want to use Jumbo frames, you need to have routers and firewalls
that correctly handle ICMP and do path MTU discovery. If you have bridges
or firewalls that aren't Jumbo aware on both interfaces, then there will
be long timeouts retries for each connection. If you have busted routers
and firewalls that swallow ICMP then PMTU won't work well either.