Date: Wed, 28 Jun 1995 14:39:20 -0400 From: Garrett Wollman <wollman@halloran-eldar.lcs.mit.edu> To: nate@sneezy.sri.com (Nate Williams) Cc: Garrett Wollman <wollman@halloran-eldar.lcs.mit.edu>, "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com>, jkh@freebsd.org (Jordan K. Hubbard), FreeBSD-current@freebsd.org (FreeBSD current) Subject: Re: Paul Richards: sysconfig routed setting Message-ID: <9506281839.AA01339@halloran-eldar.lcs.mit.edu> In-Reply-To: <199506281837.MAA03494@rocky.sri.MT.net> References: <8337.804273321@whisker.internet-eireann.ie> <199506280552.WAA08478@gndrsh.aac.dev.com> <9506281556.AA00902@halloran-eldar.lcs.mit.edu> <199506281837.MAA03494@rocky.sri.MT.net>
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<<On Wed, 28 Jun 1995 12:37:45 -0600, nate@sneezy.sri.com (Nate Williams) said:
>> If you are not a router, you have no business
>> listening to them. HOSTS DO NOT NEED ROUTING INFORMATION.
> OK, given your assertion's, HOW is machine B supposed to send data to
> my machine?
> Ethernet =
> SLIP/PPP *
> machine-A<=>machine-B<=>machine-C<*>{internet}
> ^
> *
> v
> Nate's box
Machine A is a router. It runs a routing protocol.
> With your assumption, machine B does is not running any routing
> software, so therefore it does not know to send packets to machine A in
> order to get to my machine.
Machine B has a default router R. R and A exchange routing protocol
packets to inform each other of their locations. When machine B sends
a packet for `Nate's box' to R, R sends an ICMP redirect back to B
telling it that `Nate's box' should be reached by way of A, and B
sends future packets directly.
-GAWollman
--
Garrett A. Wollman | Shashish is simple, it's discreet, it's brief. ...
wollman@lcs.mit.edu | Shashish is the bonding of hearts in spite of distance.
Opinions not those of| It is a bond more powerful than absence. We like people
MIT, LCS, ANA, or NSA| who like Shashish. - Claude McKenzie + Florent Vollant
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