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Re: [ippm] Enhanced Alternate Marking draft-zhou-ippm-enhanced-alternate-marking-07

Greg Mirsky <gregimirsky@gmail.com> Mon, 25 October 2021 02:25 UTC

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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Sun, 24 Oct 2021 19:25:13 -0700
Message-ID: <CA+RyBmXyNiQVJhLVpp1uRMrF=8vFndcRvqrokic4JgJVNGBv4w@mail.gmail.com>
To: Tianran Zhou <zhoutianran@huawei.com>
Cc: "IETF IPPM WG (ippm@ietf.org)" <ippm@ietf.org>
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Subject: Re: [ippm] Enhanced Alternate Marking draft-zhou-ippm-enhanced-alternate-marking-07
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Hi Tianran,
thank you for bringing up this work. I've read the draft and have several
comments, questions. Please kindly find those below:

   - Based on the comments during the IESG review of
   draft-ietf-6man-ipv6-alt-mark, I see a value in extending FlowMonID. That
   might reduce the probability of a collision.
   - What could be the use case for the Flow direction identification flag?
   As the AltMark is applied to the data traffic, wouldn't it always be in the
   forward direction?
   - I'm also not clear about the use of the Measurement mode flag. I
   thought that the mode, hbh or e2e, is determined by the choice of
   appropriate IPv6 EH - Hop-by-Hop Option Header or Destination Option
   Header, accordingly. Am I missing something here?
   - Reading the draft, it was not clear how the extended header helps to
   lower marking intervals increasing the density of measurements.

Regards,
Greg

On Thu, Oct 21, 2021 at 11:27 PM Tianran Zhou <zhoutianran@huawei.com>
wrote:

> Hi WG,
>
>
>
> There are many interests in this working group working on the alternate
> marking, RFC8321 and RFC8889.
>
> As you may have seen, we applied this method in IPv6, and the draft is in
> IESG review.
>
> https://datatracker.ietf.org/doc/draft-ietf-6man-ipv6-alt-mark/
>
>
>
> Based on the above draft, and the comments/suggestions we received, we
> produced an Enhanced Alternate Marking Method.
>
>
> https://datatracker.ietf.org/doc/draft-zhou-ippm-enhanced-alternate-marking/
>
>
>
> This document extends the IPv6 Alternate Marking Option,  to provide the
> enhanced capabilities and allow advanced functionalities.
>
>
>
> We hope you like this idea.
>
> Any comments are welcome.
>
>
>
> Thanks,
>
> Tianran
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