No gigabit with either bcm5700 or tg3

Mark Watts m.watts at eris.qinetiq.com
Mon Oct 18 10:32:00 CDT 2004


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If you are checking connection speed using mii-tool, be aware that this only 
supports up to 100/FD.

ethtool  will give you accurate results for GigE.

Mark.

> Hi Folks,
>
> I have been tackling this for a few days now. We have a 1750 running
> Redhat 9 2.4.20-8SMP and neither the tg3 driver nor the download bcm5700
> driver from Broadcom or the bcm5700 driver on the Dell driver CD will
> give me a gig connection. The tg3 driver will not even work in the Layer
> 2 Alcatel 6300 switch. The bcm5700 driver does work in the switch, but
> only negotiates 100 mb/s. I've tried to upgrade the kernel to 2.4.27 to
> see if a later tg3 driver works better and that indeed does allow tg3 to
> connect to the Alcatel switch, but the tg3 driver still won't negotiate
> gig speeds.
>
> Under 2.4.20 I've applied the bcm5700 option feature in modules.conf,
> but that doesn't  work either.
>
> The bcm5700 also restarts the nic during bootup and that screws up my
> NIS connections! I read a workaround for that somewhere, but I can't
> remember where!
>
>
> Interestingly, the 1750 always connects at 100mb/s before the OS loads.
> That is, as soon as it pwers up the the switch indicates it's at 100
> mb/s connection.  I'm not sure if that's normal and that the drivers
> then force the chip to gig mode or it indicates some hardware problem.
>
> Should I just forget this foolishness and go with an Intel PCI-X card?
> If so which model would your ecommend?
>
> Thanks for any help!

- -- 
Mark Watts
Senior Systems Engineer
QinetiQ Trusted Information Management
Trusted Solutions and Services group
GPG Public Key ID: 455420ED

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