Date: Mon, 05 Apr 2004 11:44:47 +0200 From: Anders Lowinger <anders.lowinger@packetfront.com> To: Luigi Rizzo <rizzo@icir.org> Cc: net@freebsd.org Subject: Re: do we support non contiguous netmasks ? Message-ID: <40712A8F.9000704@packetfront.com> In-Reply-To: <20040331005914.A6934@xorpc.icir.org> References: <20040331005914.A6934@xorpc.icir.org>
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Luigi Rizzo wrote: > Hi, > i was wondering if anyone knows what kind of support we have > in FreeBSD networking code, for non contiguous netmasks. > While it is trivial to support them for interface addresses, > managing them in the routing table is probably far from trivial > and I believe also mostly useless... and anyways, i have no > idea how our kernel code deals with them Not sure why you wonder? Do you need it? If we implement a mtrie for faster routing-lookups, non-contiguous masks need to go. Not even Cisco implements anything else than contiguous masks, and I have a very hard time to understand why they are needed. /Anders
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