Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site ucbvax.BERKELEY.EDU Path: utzoo!decvax!ittatc!dcdwest!sdcsvax!ucbvax!USC-ISID.ARPA!MILLS From: MILLS@USC-ISID.ARPA Newsgroups: mod.protocols.tcp-ip Subject: Re: more interesting features of 4.2 Message-ID: <8606111507.AA23246@ucbvax.Berkeley.EDU> Date: Wed, 11-Jun-86 10:34:49 EDT Article-I.D.: ucbvax.8606111507.AA23246 Posted: Wed Jun 11 10:34:49 1986 Date-Received: Wed, 11-Jun-86 22:11:16 EDT Sender: daemon@ucbvax.BERKELEY.EDU Organization: The ARPA Internet Lines: 25 Approved: tcp-ip@sri-nic.arpa In response to the message sent Tue, 10 Jun 86 17:47:30 cdt from "Matt Crawford" Matt, USAN (192.17.4) is currently gatewayed to ARPANET via a fuzzball at U Michigan on an experimental basis. The fuzzball gateway is gimmicked with an incredible routing algorithm that provides connectivity for all the j-random networks babbling on the USAN channel, as well as many other networks that seem to be passing by from time to time. The gimmicks include "promiscuous" ARP, dynamic logical-address translation and multiple delay-based routing algorithms sharing the same cable. While the experiment is somewhat of a lashup at present, the experience gained seems to indicate that it would be practical to evolve a working standard for multiplexing broadcast channels with arbitrary routing plexes. Whether you want to do that on a performance basis may be another matter. The experience with showers of redirects and unreachables in this environment was what led to my suggestion a few days back on a standard filtering algorithm for Internet gateways. Hans-Werner Braun (hwb@gw-umich.edu) did most of the brain-punishing work in evolving the techniques and making the fuzzball gateway play on USAN. Dave -------