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Date: Thu, 5 Sep 2002 17:34:36 +0200
From: Alex Riesen <Alexander.Riesen@synopsys.com>
To: Andrew Ryan <genanr@emsphone.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: ARP and alias IPs
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On Thu, Sep 05, 2002 at 10:09:50AM -0500, Andrew Ryan wrote:
> The linux implementation of ARP is causing me problems.  Linux sends out an
> ARP request with the default interface as the sender address, rather than then
> interface the request came on. 

http://www.rfc-editor.org/rfc/std/std37.txt

> For example
> 
> eth0   10.1.1.100
> eth0:1 192.16.1.101 

Are you really expect an aliased interface to work the way you described?

> and an ARP is received on 192.16.1.101, linux responds with
> 10.1.1.100 as the source address in the ARP request, rather than 192.16.1.101
> (which FreeBSD, Solaris, and tru64 do).  To me, this is just plain wrong. 
> The sender address should be an address on the subnet that the request came
> from, not a different one.  Is there any way to fix this?
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