[114430] in North American Network Operators' Group
Re: two interfaces one subnet
daemon@ATHENA.MIT.EDU (Charles Wyble)
Mon May 11 17:00:43 2009
Date: Mon, 11 May 2009 14:00:30 -0700
From: Charles Wyble <charles@thewybles.com>
To: Mikael Abrahamsson <swmike@swm.pp.se>
In-Reply-To: <alpine.DEB.1.10.0905112237080.22851@uplift.swm.pp.se>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
What does two interfaces in one subnet mean?
Two NICs? Or virtual interfaces?
Mikael Abrahamsson wrote:
> On Mon, 11 May 2009, Chris Meidinger wrote:
>
>> I've been looking through RFC's trying to find a clear statement that
>> having two interfaces in the same subnet does not work, but can't find
>> it that statement anywhere.
>
> I don't know if it still works, but it did in Linux little over 10 years
> back. Proxy-arp:ed all the IPs in the /27 in the /24 and everything was
> fine (legacy reasons plus radiolink which I didn't want to run a lot of
> broadcasts over). There are "legitimate" cases where you might want to
> do this.
>
