From owner-freebsd-net@FreeBSD.ORG  Tue May 22 17:33:12 2007
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To: Gleb Smirnoff <glebius@FreeBSD.org>
In-reply-to: Your message of "Tue, 22 May 2007 18:22:12 +0400."
	<20070522142212.GZ89017@FreeBSD.org> 
Date: Tue, 22 May 2007 10:07:03 -0700
From: Bakul Shah <bakul@bitblocks.com>
Message-Id: <20070522170703.5EC555B3E@mail.bitblocks.com>
Cc: net@FreeBSD.org
Subject: Re: walking (and cleaning) the routing table on mask change? 
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>   what do you think about cleaning the routing table on mask change?

I think it would be far easier and more correct to not allow
just the mask change (which is never really needed).

$ ifconfig tap0 10.1.1.0/24
$ netstat -nr | grep tap0
10.1.1.0/24        link#6             UC          0        0   tap0
$ ifconfig tap0 10.1.1.0/26
$ netstat -nr | grep tap0
10.1.1.0/26        link#6             UC          0        0   tap0