Subject: Re: always print IPv4 alias addresses
To: Erik E. Fair <>
From: Jason R Thorpe <>
List: tech-net
Date: 04/28/2001 20:23:58
On Sat, Apr 28, 2001 at 07:47:10PM -0700, Erik E. Fair wrote:

 > Um, well, there is the question of what IP address gets stuffed into 
 > a packet without one (i.e. most applications don't bother to set one, 
 > so you get one from the interface that the routing table decides to 
 > send the packet out), and that marks the difference between the 
 > interface's "address" and an "alias".

Not really.  Consider IPv6 -- is your autoconfigured global, link-local,
or statically-assigned address the "main" address?

It seems like the ideas in the IPv6 source-address-selection draft could
be applicable to IPv4, as well.

        -- Jason R. Thorpe <>