Via Velocity NIC inquiry

[Justin Piszcz]

On Sun, 25 Jun 2006, Jay Cliburn wrote:

> Looking for anyone running FC5 who's using a Via Velocity 6122 gigabit
> NIC.  This is on an Abit AV8 K8T800 motherboard.  I just noticed the
> other day while moving files across my LAN that the NIC is operating at
> 100Mbps instead of 1000Mbps.  I ran iperf to confirm it, and ethtool
> shows:
>
> [root at osprey ~]# ethtool eth0
> Settings for eth0:
>        Supported ports: [ TP ]
>        Supported link modes:   10baseT/Half 10baseT/Full
>                                100baseT/Half 100baseT/Full
>                                1000baseT/Half 1000baseT/Full
>        Supports auto-negotiation: Yes
>        Advertised link modes:  Not reported
>        Advertised auto-negotiation: No
> ---->   Speed: 100Mb/s
>        Duplex: Full
>        Port: Twisted Pair
>        PHYAD: 0
>        Transceiver: internal
>        Auto-negotiation: on
>        Supports Wake-on: puag
>        Wake-on: g
>        Current message level: 0x00000002 (2)
>        Link detected: no
>
> Turning off autnegotiation and forcing the speed to 1000Mbps causes the
> NIC to report in at 10Mbps in ethtool.
>
> [root at osprey ~]# ethtool -s eth0 autoneg off
> [root at osprey ~]# ethtool -s eth0 speed 1000
> [root at osprey ~]# ethtool eth0
> Settings for eth0:
>        Supported ports: [ TP ]
>        Supported link modes:   10baseT/Half 10baseT/Full
>                                100baseT/Half 100baseT/Full
>                                1000baseT/Half 1000baseT/Full
>        Supports auto-negotiation: Yes
>        Advertised link modes:  Not reported
>        Advertised auto-negotiation: No
> ---->   Speed: 10Mb/s
>        Duplex: Full
>        Port: Twisted Pair
>        PHYAD: 0
>        Transceiver: internal
>        Auto-negotiation: off
>        Supports Wake-on: puag
>        Wake-on: g
>        Current message level: 0x00000002 (2)
>        Link detected: no
>
> I've swapped cables and switch ports, and I've power cycled the switch,
> all to no avail.  My wife has an identical system running WinXP plugged
> into the same switch, and her NIC reports 1000 Mbps.
>
> My NIC in the past has run at 1000 Mbps, and I have an old iperf output
> file showing performance at 476 Mbps.
>
> Can anyone running FC5 validate their Via Velocity's speed for me before
> I begin suspecting a hardware problem?
>
> Thanks,
> Jay
>
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What does the kernel via dmesg say it has established a connection at (in 
mbps)?