[ippm] Questions on draft-morton-ippm-capacity-metric-protocol-01

"MORTON JR., AL" <acmorton@att.com> Tue, 19 October 2021 22:32 UTC

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From: "MORTON JR., AL" <acmorton@att.com>
To: IETF IPPM WG <ippm@ietf.org>
Thread-Topic: Questions on draft-morton-ippm-capacity-metric-protocol-01
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Date: Tue, 19 Oct 2021 22:31:53 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ippm/ZXEe7sLlNURWuZcB84V11dLomGc>
Subject: [ippm] Questions on draft-morton-ippm-capacity-metric-protocol-01
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Hi IPPM,

Len Ciavattone and I am looking for some feedback on our protocol [0] designed to help measure the Maximum IP-Layer Capacity Metric (which will be published as an RFC shortly).

We are asking folks to take a look at the draft, because we are fairly sure you will have some questions!

One area where we know more development is required is the Modes of operation, which essentially describes how the different aspects/exchanges of the protocol will be made secure. This is pretty-much a green-field in our specification, so suggestions are very welcome.  Section 10 currently describes the different modes that we imagined to be useful (A through F below), but practical aspects of any proposed solution might indicate modes that should be combined, split-up, or new modes.

So, please give the draft and/or the list below a look, and let us know what you think.

thanks!
Al 


[0] https://datatracker.ietf.org/doc/html/draft-morton-ippm-capacity-metric-protocol-01.txt

   3.  Client-server authentication and integrity protection for
       feedback messages conveying measurements is RECOMMENDED.  To
       accomodate different host limitations and testing circumstances,
       different modes of operation are recommended:

 A. Un-authenticated mode (for all phases)
AND
 B. OPTIONAL Authenticated set-up only
SHA-256 HMAC time-window verification (5 min time stamp verification)
(could add silent failure option)

     -=-=-=-=-=-=-=-=-=-

 C. Encrypted setup and test-activation
(currently using OpenSSL Library, so KISS, but may be too slow for
test packets)

     -=-=-=-=--=- Old/low-power host performance impacts -=-=-=-=-=-=-

 D. Encrypted feedback messages

 E. Integrity protection for test packets SHA-256 HMAC

 F. Encrypted test packets (maybe also valuable to defeat compression on links)