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Re: [Srcomp] REQ-8-17-FWD-EFFICIENCY

Ron Bonica <rbonica@juniper.net> Mon, 17 August 2020 20:05 UTC

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From: Ron Bonica <rbonica@juniper.net>
To: "Darren Dukes (ddukes)" <ddukes=40cisco.com@dmarc.ietf.org>, "srcomp@ietf.org" <srcomp@ietf.org>
Thread-Topic: REQ-8-17-FWD-EFFICIENCY
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Date: Mon, 17 Aug 2020 20:05:50 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/srcomp/GnwvxDCFQG3sToWrKdUVzwNBImA>
Subject: Re: [Srcomp] REQ-8-17-FWD-EFFICIENCY
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Darren,

Are D.PRS and D.IKU metrics that an operator actually cares about?

I think that an operators' only concern is whether a compression mechanism can be implemented to forward at line speed at a reasonable space/power/cost budget.

                                                                                          Ron




Juniper Business Use Only
From: Srcomp <srcomp-bounces@ietf.org> On Behalf Of Darren Dukes (ddukes)
Sent: Monday, August 17, 2020 2:43 PM
To: srcomp@ietf.org
Subject: [Srcomp] REQ-8-17-FWD-EFFICIENCY

[External Email. Be cautious of content]

FWD-Efficiency: Forwarding Efficiency

Description: The compression solution SHOULD minimize the number of required hardware resources accessed to process a segment.

Rationale: Efficiency in bits on the wire and processing efficiency are both important.  Optimizing one at the expense of the other may lead to issues in implementations.

Metric: The data plane efficiency metric (D) records the data plane forwarding efficiency of the proposed solution.  Two separate metrics are used:

   o  D.PRS(segment list): worst-case number of headers parsed during
      processing of the segment list.

   o  D.LKU(segment list): worst-case number of FIB lookups during
      processing of the segment list.

A proposal that minimizes each of these metrics would meet this requirement

Darren

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