Subject: Re: Patch to change ethernet link addresses
To: David Young <>
From: Bill Studenmund <>
List: current-users
Date: 08/10/2003 17:52:45
On Sat, 9 Aug 2003, David Young wrote:

> I tentatively agree with Itojun that you should use SIOCDLIFADDR and
> SIOCALIFADDR, instead of SIOCSLIFADDR, in anticipation of link-level
> aliases. I agree tentatively because I do not (yet) see why support for
> link-level aliases is desirable.

So you can implement a virtual server that is backed by two real servers
in a fail-over configuration. By having an alias for the MAC of the
"server", when one box takes over for the other, no other devices on the
net will need to update their arp tables (and possibly complain that
the arp tables changed).

Take care,