two interfaces one subnet

Charles Wyble charles at
Mon May 11 16:00:30 CDT 2009

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.

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