On Wed, 19 Oct 2005, zhangjian 24185 wrote:
I have submitted the draft, draft-jian-ipv6-meaheader.The purpose of
this document is to introduce a measurement header. Measurement
header is a new type of IPv6 extended header used for network
measurement. The information needed by measurement carried in
measurement header. The parameters can be calculated based on these
information.
Would you mind give me some comments?
You use the standard TLV format, good.
As long as you imagine that this is only used between consenting
adults in private experiements, this would be an OK approach. (As such
it might or might not need to be published in the IETF, but if you'd
want to do so, direct submission to the RFC-editor for either
informational or experimental RFC might be best.)
On the other hand, if you are interested in wider applicability, you
should probably seriously evaluate the different tradeoffs where you
want to perform the measurements. Using an extension header might be
a very awkward place to do that, and might interfere with a lot of
other operational things (like firewalls). Just using an upper-layer
protocol could possibly do the job.
Note that only (certain) hop-by-hop options are expected to be
inspected by intermediate nodes. This header type has a subtype "this
message header need to be processed hop-by-hop". This has an
architectural issue, but again, if you want to use this for very
limited measurements only, feel free..
(I didn't really review the spec, I just looked at the parts which are
most likely to be problematic.)
--
Pekka Savola "You each name yourselves king, yet the
Netcore Oy kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
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