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From: ron@TOPAZ.RUTGERS.EDU (Ron Natalie)
Newsgroups: comp.protocols.tcp-ip
Subject: Re:  Multiple subnets on one physical net
Message-ID: <8711091827.AA12028@topaz.rutgers.edu>
Date: Mon, 9-Nov-87 13:27:09 EST
Article-I.D.: topaz.8711091827.AA12028
Posted: Mon Nov  9 13:27:09 1987
Date-Received: Tue, 17-Nov-87 05:49:03 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 15

It is important for the general health of an complex IP network to
keep hosts that are not supposed to be functioning as routers (gateways)
from forwarding packets at all.   This more than anything else has
caused more problems, e.g.:

	Host receives broadcast packet with wrong type broadcast
	IP address and tries to ARP for it, sending host into
	tight loop (Old Wollongong VMS TCP/IP).

	Host receives packet for some host other than itself, tries
	to send an ICMP error packet and generates bogus ARP field
	causing other hosts to think that it was the host that sent
	the packet (Ungerman Bass TCP).

-Ron