Path: utzoo!attcan!uunet!husc6!mailrus!uwmcsd1!ig!agate!ucbvax!bridge2.UUCP!fjd
From: fjd@bridge2.UUCP (Farokh J. Deboo)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: ICMP's & IP src addrs
Message-ID: <8809180620.AA03030@bridge2.LOCAL>
Date: 18 Sep 88 06:20:32 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 24

In this discussion, although we have determined that the  source  address
to  be  used for the ICMP echo response should be the internet address of
the responding interface (as opposed to the destination  address  of  the
original broadcast ICMP echo request), there have been differing opinions
as to whether an echo response should at all be generated to the original
broadcast ICMP echo request.

Can we reach some consensus on this issue, and perhaps issue the  result-
ing statements in an enhanced RFC?  Or is it already part of the Host Re-
quirements RFC (where can I get a copy?).

RFC 792 already states the following about  when  NOT  to  generate  ICMP
responses:

1.   To avoid the infinite regression of messages about messages etc., no
     ICMP (error) messages are sent about ICMP messages.

2.   Also ICMP messages are only sent about errors in  handling  fragment
     zero of fragmented datagrams.

Farokh Deboo (sun!bridge2!fjd)
3Com Enterprise Systems Division
(415) 940-7677
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