Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!ucbvax!VAX.FTP.COM!stev
From: stev@VAX.FTP.COM
Newsgroups: comp.protocols.tcp-ip
Subject: Re:  [RAF%NIHCU.BITNET@CUNYVM.CUNY.EDU: Routing with redundant connections]
Message-ID: <8905171336.AA00479@vax.ftp.com>
Date: 17 May 89 13:36:29 GMT
Sender: usenet@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 29

*From: jnc@proteon.com (J. Noel Chiappa)

*	RFC-1009 states that: "A gateway will generate an ICMP Redirect if
*and only if ... the next-hop gateway is on the same (sub-)network as the
*source host." The ICMP RFC (RFC 792) says more or less the same thing: "If
*[the next-hop gateway] and the [source host] are on the same network, a
*Redirect message is sent".


*	Noel

it all depends on how you interpret the line above. it doesnt say
something to the effect of "using the same interface", it says "is on
the same subnet".  both routers *are* on the same subnet as the host,
regardless of the routing of packets between the two routers. the
routers *should* send the ICMP redirect. now, this may be hard for
the router in question to know (that the second router is also on
the subnet that the host is on), but this is something that needs to be
dealt with in the routing protocols.


this may, ofcourse, not be in keeping with the "spirit" of the above lines,
but seems to me to be a reasonable interpretation. so i must be missing
something . . . . . .


stev knowles
stev@ftp.com
ftp softwar