[CentOS] tg3 gigabit speed

[Michael Grinnell]

IIRC, mii-tool doesn't understand gigabit, and will always report it  
as being at 100Mbit.  Use eth-tool or look at the switch to determine  
if it's actually running at 1Gbit.

Michael Grinnell
Network Security Administrator
The American University

On Mar 4, 2006, at 1:07 PM, Jure Pečar wrote:

>
> Hi all,
>
> I have two HP DL145 G1 machines, running centos4 (2.6.9-22.0.2.ELsmp).
> Nics are recognized as:
>
> eth0: Tigon3 [partno(BCM95704) rev 2002 PHY(5704)] (PCIX:100MHz:64- 
> bit)
> 10/100/1000BaseT Ethernet 00:00:1a:19:f1:05
> eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] Split[0] WireSpeed 
> [1] TSOcap
> [1]
> eth1: Tigon3 [partno(BCM95704) rev 2002 PHY(5704)] (PCIX:100MHz:64- 
> bit)
> 10/100/1000BaseT Ethernet 00:00:1a:19:f1:04
> eth1: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] Split[0] WireSpeed 
> [1] TSOcap
> [1]
>
> Both machines are wired in the same way: eth0 is connected do 100mbit
> switch, eth1 to a gigabit switch. But:
>
> # mii-tool
> eth0: negotiated 100baseTx-FD, link ok
> eth1: negotiated 100baseTx-FD flow-control, link ok
>
> If I force eth1 to 1000 with ethtool, I get no link and then it
> autonegotiates itself back to 100. I can't even get them to talk at  
> gigabit
> speed if I connect both machines together with crossover cable!
>
> Am I doing something wrong or is this a hardware problem?
>
>
> -- 
>
> Jure Pečar
> http://jure.pecar.org/
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