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From: JNC@MIT-XX.ARPA ("J. Noel Chiappa")
Newsgroups: mod.protocols.tcp-ip
Subject: Re: Subnetting and gateways
Message-ID: <12166679970.31.JNC@MIT-XX.ARPA>
Date: Thu, 12-Dec-85 23:49:10 EST
Article-I.D.: MIT-XX.12166679970.31.JNC
Posted: Thu Dec 12 23:49:10 1985
Date-Received: Sat, 14-Dec-85 03:48:52 EST
References: <LYNCH@USC-ISIB.ARPA>
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Approved: tcp-ip@sri-nic.arpa


	Dan, the suggested modification to the host IP layer (to support
subnetting), and other changes in gateways that the Gateway Committee
are contemplating, are supposed to make the host IP layer simpler, not
more complicated. The whole idea is precisely to put all the smarts in
the gateway, with only the simplest possible cache in the host, and to
attempt insulate the host IP layers from any further changes to the
basic system architecture. Once all hosts use the mask technique, and
get (and use) only per-host Redirects, it will be possible for the
gateways to play arbitrary games with the layout of the system without
the host IP layers noticing. The sooner this change is installed
everywhere the better.


	Noel
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