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Old 07-03-06, 10:06 PM   #1
pyite
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Join Date: Mar 2006
Posts: 8
Default forcedeth not allowing gigabit speed - why?

I have an Asus A8N-VM which claims to be gigabit-compatible. I am trying to plug it into a switch that is working with gigabit and another computer just fine.

However, ethtool reports the following:
Settings for eth0:
Supported ports: [ MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s



Any idea how to get 1000Mb/s into the list? I am using Dapper LTS, recently installed.

Thanks,
Mark
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Old 07-04-06, 02:10 AM   #2
Thunderbird
 
Join Date: Jul 2002
Location: Netherlands, Europe
Posts: 2,105
Default Re: forcedeth not allowing gigabit speed - why?

The forcedeth guys might not have figured out how gigabit ethernet works on this chip. If you want gigabit ethernet you could also use nvidia's own drivers which I think support gigabit ethernet.
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Old 07-04-06, 09:05 AM   #3
Bluekkis
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Join Date: Oct 2004
Posts: 76
Default Re: forcedeth not allowing gigabit speed - why?

You might have old kernel with old driver, this is mine ethtool output (forcedeth on nForce3 /w 2.6.17-gentoo-r1 kernel)

Code:
Settings for eth0:
        Supported ports: [ MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised auto-negotiation: Yes
        Speed: 100Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 1
        Transceiver: external
        Auto-negotiation: on
        Supports Wake-on: g
        Wake-on: d
        Link detected: yes
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Old 07-04-06, 01:50 PM   #4
netllama
NVIDIA Corporation
 
Join Date: Dec 2004
Posts: 8,763
Default Re: forcedeth not allowing gigabit speed - why?

pyite,
First make sure that you're using a recent forcedeth. This means using a 2.6.16 or later kernel.

Second, make sure that your cat5 is capable of doing gigabit speeds.

Third, make certain that your switch is capable of autonegotiating to gigabit speed.

Thanks,
Lonni
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Old 07-04-06, 09:30 PM   #5
kgroombr
Using Linux Since 1995
 
Join Date: Sep 2002
Posts: 130
Default Re: forcedeth not allowing gigabit speed - why?

I would also add that if you are using crossover cables, that they are wired as:

End one:

WO O WG BL WBL G WBR BR

End two:

WG G WO WBR BR O BL WBL

WO - white/orange
O - orange
WG - white/green
BL - blue
WBL -white/blue
G - green
WBR - white/brown
BR - brown
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