Via Velocity NIC inquiry

[Justin Piszcz]

On Mon, 26 Jun 2006, Justin Piszcz wrote:

>
>
> 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)?
>
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1) Have you tried a newer kernel?
2) Have you tried a different ethernet cable?
3) Have you tried a different port on the switch?