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Date: Tue, 06 Apr 2004 15:27:36 +0200
From: Anders Lowinger <anders.lowinger@packetfront.com>
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To: Andre Oppermann <andre@freebsd.org>
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cc: Luigi Rizzo <rizzo@icir.org>
cc: net@freebsd.org
Subject: Re: do we support non contiguous netmasks ?
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> You are right.  I was looking to quickly.  However at least my Cisco
> doesn't like it: "Bad mask 0xFFFFFD00 for address", IOS 12.2(10).

As I mentioned in my first email, Cisco only supports contignous netmasks.

I was just trying to elaborate on when/why non-contignous netmasks
would be good to have. I'm pretty sure no-one is using them....

> Never heard of that (only supernets/subnets with respect to classful
> notation), never done it and at least my Cisco 7500 doesn't like it.
> So I doubt others have got their Cisco to like it.

Correct.
This is one of the first thing they mention in the manuals.

/Anders