On 10/11/2010 2:46 PM, Matthew Grooms wrote:
On 10/11/2010 12:45 PM, Bernd Muschke wrote:
Hi Matthew,
LSO was a good hint, thank you.
Today we did some tests with our "bad" adapters all with current drivers.
Intel:
82566DM-2 and PRO/1000 MT are only ok when you switch off LSO
Broadcom:
57xx does not provide such a switch, we switched off every other
available option one at a time without success
Do you have the ability to test such an adapter? You can see immediately
if it is ok or not when you simply copy a 20MB file with Winscp or any
other client which shows you transfer rates. The rates are very low and
change all the time and might even drop completely.
While you don't transfer files you might not even notice that there is a
problem. We used our "bad" adpaters all day long with Putty and thought
that everything was ok.
So now we know that we can add Intel cards to our Broadcom desktops and
switch off LSO to bypass our problem but this is not the best
solution.....
Hi Bernd,
I just ordered both a PCI-X and a PCI-e version of the Intel PRO/1000 MT
adapters. After a bit of googling, it would appear that Broadcom has a
tool called BACS that can be used to disable the LSO support feature of
Netxtreme cards. I'm not sure if this is the right version for your
particular adapter. The version.txt file says it supports Vista but not
Windows 7. I would give it a try anyway as Vista and Windows 7 are very
similar OS's ...
http://www.broadcom.com/support/ethernet_nic/netxtremeii.php
I'm interested in fixing this issue. But I would feel more motivated to
make this a high priority if you can verify that the client also works
well with a Netxtreme adapter that has the LSO feature disabled. If so,
fixing the Intel card LSO issue should also have a high probability of
resolving your Broadcom Netxtreme issue as well.
A bit more information on BACS and LSO options ...
http://support.dell.com/support/edocs/network/broadcom/r125875/en/bacs.htm
-Matthew
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