On Sun, Aug 16, 2009 at 4:33 AM, Manuel Bouyer
<bouyer%antioche.eu.org@localhost> wrote:
> ex1: transmit underrun (9000) @20
This means the 3com chip couldn't get data fast enough from the PCI bus.
THis is usually because another device (or possibly the CPU) holds the PCI
bus for too long. It's probably happening only once in a while (no more than
once every 256 packets) otherwise it would have bumped the TX threshold.
This is just a quesiton to anyone:
If this is the case, does it help to activate the checksum features built into the adapter?:
ex0: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
capabilities=3f00<IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,TCP4CSUM_Tx,UDP4CSUM_Rx,UDP4CSUM_Tx>
I guess the answer is probably: "It might."
Andy