Re: "link up" (was Re: PII fast enough for firewall)

[David Brodbeck <brodbd@u.washington.edu>]

On Dec 3, 2007, at 2:39 PM, Ron Johnson wrote:

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> On 12/03/07 16:11, Ralph Katz wrote:
> [snip]
> > Maybe check your NIC.  What do you get for this (etch):
> > $ grep 'link up' /var/log/dmesg
> >
> > Maybe the ancient PII has an ancient ethernet card!
>
> My (just purchased) system running kernel 2.6.22 describes a SATA
> link when running that command.  Ethernet is described grepping for
> "eth".

You'll probably find 'ethtool' more useful for this sort of thing.  
For example:

# ethtool eth0
Settings for eth0:
        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