[CentOS] network interface cards with gig support

[Gregg]

On Tue, 2007-05-08 at 09:10 -0700, Greg Bailey wrote:
> Gregg wrote:
> > anyone know how to force network cards talk at gig speeds when all it
> > wants to do is establish a connection at 100mbits
> >
> > root at host1 [/backup/cpbackup/daily]# mii-tool
> > eth0: negotiated 100baseTx-FD, link ok
> > eth1: negotiated 100baseTx-FD flow-control, link ok
> >
> >
> >   
> One of mii-tool's limitations is that it doesn't report gig speeds 
> correctly.
>  From the man page:
> 
> NOTE
>        This program is obsolete. Valid media are only 100baseT4, 
> 100baseTx-FD,100baseTx-HD, 10baseT-FD and 10baseT-HD ethernet cards. For 
> replacement check eth-tool.
> 
> Using ethtool:
> 
> [root at el4-node1 ~]# 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:  10baseT/Half 10baseT/Full
>                                 100baseT/Half 100baseT/Full
>                                 1000baseT/Half 1000baseT/Full
>         Advertised auto-negotiation: Yes
>         Speed: 1000Mb/s
>         Duplex: Full
>         Port: Twisted Pair
>         PHYAD: 0
>         Transceiver: internal
>         Auto-negotiation: on
>         Current message level: 0x000000ff (255)
>         Link detected: yes
> 
> -Greg
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awesome. I didn't know about that util. 

Thanks for the info and sure enough 

root at host1 [~/.ssh]# ethtool eth1
Settings for eth1:
        Supported ports: [ MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 1000baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 1000baseT/Full
        Advertised auto-negotiation: Yes
        Speed: 1000Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: g
        Wake-on: d
        Current message level: 0x000000ff (255)
        Link detected: yes

-Gregg