Re: PROBLEM: Network sky2 Module

From: ben soo
Date: Thu Sep 20 2007 - 02:43:40 EST


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.
[...]

Stephen Hemminger wrote:
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.

i turned off the motherboard Marvell Gbit devices and installed a Realtek 8169 card, all the while keeping to kernel version 2.6.23-rc6, and saw all the network problems go away. Must mean it was a sky2 driver bug.

Am currently running 2.6.23-rc7 on the affected server and the rc7 sky2 driver is holding up fine so far.

thank you!

b
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