Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!samsung!ginsburg
From: ginsburg@samsung.COM (Scott Ginsburg)
Newsgroups: comp.protocols.tcp-ip
Subject: IP routing and gateways
Keywords: routing,gateway
Message-ID: <14418@samsung.samsung.com>
Date: 10 Jul 90 13:58:56 GMT
Organization: Samsung Software, Andover MA.
Lines: 31

I'm trying to get a handle on IP routing and gateway visibility for a
device (not necessarily running Unix) on an Ethernet. This device is
part of a class C network, has a single Ethernet interface, and there
will probably be more than one IP gateway to either the outside world
(T1, etc) or another class C network within the same installation on
a different Ethernet backbone. My questions are:

	1.) Is it the case that I need to provide a default gateway
	    address for IP packets that aren't destined for someone
	    within my subnet?

	2.) Do I need to implement an IGP like RIP and maintain routing
	    tables (even though this device only has one network
	    interface) so that I choose the correct gateway to route
	    my outgoing packets to, or is it OK to go to the same
	    gateway (default) every time?

	3.) If the answer to 2 is that it's not smart to go to the
	    same gateway every time, then is something like RIP (which
	    should be available on most Unix networks because of
	    routed) the way to go, or does the ICMP redirect take care
	    of letting me know that one internal gateway is better than
	    another for an outgoing packet?

						Thanks in advance,
						Scott
-- 
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Scott Ginsburg WA2CJT	  Voice: 508-685-7200  FAX: 508-685-4940
Samsung Software America  Internet: ginsburg@samsung.com
Andover, MA