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Re: [Roll] WGLC - Working Group Last Call - draft-ietf-roll-trickle-mcast-05

Michael Richardson <mcr+ietf@sandelman.ca> Mon, 16 September 2013 14:59 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
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Date: Mon, 16 Sep 2013 10:59:14 -0400
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Subject: Re: [Roll] WGLC - Working Group Last Call - draft-ietf-roll-trickle-mcast-05
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Kerry Lynn <kerlyn@ieee.org> wrote:
    don>>           I believe it is requirement that all devices in a given
    don>> MPL Domain MUST agree on a common value for IMIN, IMAX and k.  In
    don>> terms of a default, we can certainly create such values applicable
    don>> to given deployment topology and an assumed messaging profile but I
    don>> really think some work should go into an applicability statement
    don>> that would provide additional guidance on how to tune these
    don>> values.  I think I mentioned this before but we did (in ZigBee IP)
    don>> create a 30 node, 3 hop network supporting a ROLL RPL instance,
    don>> instrumented all devices, created a single multicast message and
    don>> measured how many devices in the network saw at least a single copy
    don>> of the transmission using various settings for IMIN, IMAX and k.  A
    don>> process similar to this (with knowledge of the topology and
    don>> messaging profile) is needed for tuning these values in a real
    don>> deployment setting.

    Kerry> ACK.  Thanks for your explanations.

With this, are your questions resolved, or are there further text changes
requested?

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
IETF ROLL WG co-chair.    http://datatracker.ietf.org/wg/roll/charter/

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