Re: 2 NIC's, assigned in wrong order

From: Jan Minar (Jan.Minar_at_seznam.cz)
Date: 12/29/03

  • Next message: Greg Folkert: "The US is Right (was re: some ID10T is out of the office.)" 
    Date: Mon, 29 Dec 2003 15:41:29 +0100
To: debian-user@lists.debian.org

    Morning!

    Please don't CC me, I'm subscribed.

    On Sun, Dec 28, 2003 at 07:22:04PM -0700, Dean Allen Provins wrote:
    > > nameif (8) - name network interfaces based on MAC addresses
    > >
    > > But I couldn't find nameif called from anywhere--so I guess the right
    > > thing to do would be to call it from /etc/init.d/networking or
    > > /etc/networking/interfaces.
    >
    > That seemed like such a good suggestion. I created scripts to assign
    > the desired names to the desired MAC addresses and placed them in
    > /etc/network/if-pre-up.d/, and then added invocation in the interfaces
    > file, but I keep getting the messages (in syslog):
    >
    > Dec 28 19:11:31 ve6wvc nameif: cannot change name of eth1 to eth0: File exists

    The `file' here is the network device `eth0' -- ``ifconfig -a'' will
    show both eth1 and eth0 are there, waiting to be upped. This looks like
    a kernel limitation.

    The workaround is something like:

    # nameif foo <HWADDR1>
    # nameif eth0 <HWADDR0>
    # nameif eth1 <HWADDR1>

    So I when there is an interface bar that (1) is down, and (2) has a name
    we want, we just give bar a random name foo. If (2) is not true, we
    just proceed ourselves, and when (1) is not true, we die screaming
    aloud. Loosely:

    # HWADDR_TO_RENAME="$(ip -l | grep -A1 eth0 | tail -n1 | awk '{print $2}')"
    # [ -n "$HWADDR_TO_RENAME" ] && nameif foo "$HWADDR_TO_RENAME"

    in both the scripts, _before_ the real naming.

    > Dec 28 19:11:31 ve6wvc nameif: cannot change name of eth0 to eth1: Device or resource busy

    Then, the eth1 is UP (busy). You might want to go to singleuser mode,
    put the network down, and experiment a bit, just to grasp what's going
    on.

    > A typical script was "eth0.sh":
    <snip>

    The scripts are OK.

    > Merry Christmas to you too.

    :-) 

    -- 
Jan Minar                    Chvostny Snovy krok. \/\ Whoopy Boo Year.



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    Relevant Pages

    • Re: 2 NICs, assigned in wrong order
      ... That seemed like such a good suggestion. ... I created scripts to assign ... the desired names to the desired MAC addresses and placed them in ... Dean Provins ...
      (Debian-User)
    • Re: 2 NICs, assigned in wrong order
      ... > the desired names to the desired MAC addresses and placed them in ... but I keep getting the messages (in syslog): ... scripts that are run automatically, ... To UNSUBSCRIBE, email to debian-user-request@lists.debian.org ...
      (Debian-User)