[Linux-users] 2 IP's on the same network card

[Bill Campbell]

On Tue, Aug 28, 2007, Dirk Moolman wrote:
>
>-----Original Message-----
>From: linux-users-bounces at pananix.com
>[mailto:linux-users-bounces at pananix.com] On Behalf Of Bill Campbell
>Sent: 28 August 2007 02:57 PM
>To: linux-users at linux-sxs.org
>Subject: Re: [Linux-users] 2 IP's on the same network card
>
>>On Tue, Aug 28, 2007, Dirk Moolman wrote:
>>>Just a question - how do I make a network setting, like the eth0:1
>that
>>>I created below, permanent ? .... so that it stays when I reboot the
>>>server
>
>
>>The SuSE way to do this is ``yast2 lan'', edit the interface, go
>>to the Advanced tab, and create an alias.
>
>On one of my existing servers (installed by someone else before my
>time), there are interfaces eth0, and also eth0:1   - the latter is not
>defined as an alias.

If it's a SuSE system newer than 9.0 Pro any eth0:x interface has
been created manually, not with yast2.

The applicable scripts are under /etc/sysconfig/network with
names related to the Mac address(es) of the NICs.  Aliases appear
in these files as lines like this for the alias guardian.

IPADDR_guardian='192.136.111.16'
NETMASK_guardian='255.255.255.0'

One can manually edit the script, then do an ``ifup eth0'' which
will add new aliases.

The ``ip'' command can be used to manipulate aliases as well, but
these won't be effective on boot.

>I created an alias on the new server I am working on, but then it
>doesn't show in the ifconfig output...

Use ``ip addr list'' to list all addresses or ``ip addr list dev eth0''
to list only those for eth0.

Bill
--
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