Exception to "MUST NOT"

To: <ietf at ietf.org>
Subject: Exception to "MUST NOT"
From: "Jiwoong Lee" <porce at ktf.com>
Date: Thu, 20 Sep 2001 15:56:25 +0900

All,

This is about the requirement level in the Internet specification.

If a statement has the requirement level of 'MUST NOT' while it has an exceptional case, and while 
the exceptional case does not elucidate its requirement level, what is the appropriate requirement level of this exceptional case ?

I guess the answer is 'MAY'. Are you agreeable to this ?

I think ICMPv6 specification has the similar statements in it, regarding to the requirement level of the generation of ICMPv6 packet in response to a multicast packet or to a link local multicast packet.


Jiwoong

Follow-Ups:
- Re: Exception to "MUST NOT"
  - From: Fred Baker
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  - From: Kurt D. Zeilenga

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Exception to "MUST NOT"

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