There is no contradiction here.
(a) is talking about what nodes SHOULD send.
(b) is talking about what nodes MUST be able to receive.
-Dave
> -----Original Message-----
> From: Suresh Krishnan [mailto:[EMAIL PROTECTED]]
> Sent: Monday, September 17, 2001 2:21 PM
> To: [EMAIL PROTECTED]
> Subject: Contradiction in RFC1883
>
> Hi all,
> I might be totally wrong in this but I see that there are two
> contradicting statements in RFC1883 for IPv6. Can somebody please
explain
>
> Page 7
>
> statement a:
> Each extension header should occur at most once, except for the
> Destination Options header which should occur at most twice (once
> before a Routing header and once before the upper-layer header).
>
> statement b:
> IPv6 nodes must accept and attempt to process extension headers in
> any order and occurring any number of times in the same packet,
> except for the Hop-by-Hop Options header which is restricted to
> appear immediately after an IPv6 header only.
>
> I am sorry if this has already been raised as a question and answered.
>
> Thanks in advance,
> Suresh
>
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