Re: [gentoo-server] Can someone confirm? tg3 MTU issues.

[Brett Curtis]

Hello
On 11:25 Wed 07 Feb     , kashani wrote:
> Brett Curtis wrote:
> >Ok, this is great. In saying that do you have any idea what I should look
> >at?
> >
> >Again same tests on any of my servers running different nics work fine
> >connected to the same switch. I have the latest nic firmware from ibm... I
> >guess it could be something else ibm specific?
> >
> >These are the two cards I am having issues with.
> >
> >Broadcom Corporation NetXtreme BCM5721
> >Broadcom Corporation NetXtreme BCM5703X
> >
> >I probably should have noted that seeing the tg3 supports a wide range of
> >nics ..
> >Could you test on a machine using one of these cards or did you already?
> >
> >thanks for the response.
>
> I'm seeing the same behavior on my Dell SC servers BCM5751 and BCM5721.
> 2.6.17-gentoo-r4 in both cases.
> I might have a newer kernel I can try
> later. One thing to note is that both of these are PCI Express.
>

I have tried almost every kernel from 2.6.12 up to 20 still with no luck. All
of my nics that are failing when lowering the mtu are also on PCI Express.

> Oddly changing to MTU 1492 on the e1000 chips (82541GI) locks the
> interface for about 20-30 seconds before it responds again after which
> the ping -s 5000 does work. 2.6.19-gentoo-r5 on those servers and the
> Intel is PCI Express as well.

Works fine with my intel nic. (82546EB) again also on PCI Express.


>
> kashani

Thanks, I wonder where I should go now.. Wonder if its a tg3 kernel bug.
>
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