Suresh,

[No hats on]

Hi Folks,
I have submitted a draft requesting a standard format for IPv6 extension headers. I would appreciate any comments on it.

I really like reading clear and concise drafts!!!  Thanks!

While I agree that the problem that your draft is addressing is real, I think in practice your proposal won't have very much effect on fixing the problem. This will address new IPv6 extention headers defined in the future, but it won't address other new protocols that are defined that might show up after an IPv6 header, nor will it address the ones that have been defined in the past. The result is that a node that wants to parse all of the headers will still have to still know about each one. It will even have to know that it is a new IPv6 extension header that has this format. There is no bit or flag that identifies an IPv6 extension header.

Also, for devices like firewalls the security implications of skipping unknown (except for their format) headers isn't very good.

Finally, I think it is too late to be redefining the fragmentation header.

Bob

p.s. I hope this draft doesn't mean that someone is thinking of defining a lot of new IPv6 extension headers.... :-)


Thanks
Suresh


-------- Original Message --------
Subject: I-D ACTION:draft-krishnan-ipv6-exthdr-00.txt
Date: Wed, 18 Oct 2006 15:50:02 -0400
From: [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
To: i-d-announce@ietf.org

A New Internet-Draft is available from the on-line Internet-Drafts
directories.


        Title           : Format for IPv6 extension headers
        Author(s)       : S. Krishnan
        Filename        : draft-krishnan-ipv6-exthdr-00.txt
        Pages           : 8
        Date            : 2006-10-18
        
   In IPv6,optional internet-layer information is encoded in separate
headers that may be placed between the IPv6 header and the transport
   layer header.  There are a small number of such extension headers
   currently defined.  This document defines a format for defining new
   IPv6 extension headers.


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