Re: [Roll] ticket - 172 - clarify units of trickle timers

Michael Richardson <mcr+ietf@sandelman.ca> Mon, 17 August 2015 17:31 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, 17 Aug 2015 13:31:52 -0400
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Subject: Re: [Roll] ticket - 172 - clarify units of trickle timers
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Kerry Lynn <kerlyn@ieee.org> wrote:
    > peter van der Stok <stokcons@xs4all.nl> wrote:
    >> It will be a nuisance if sets of nodes must be initialized with
    >> different
    >> Imin and Imax values to reach the same behaviour.
    >> The same problem will occur when a YANG (SMIv2) description is
    >> made for
    >> managing these parameters.

    > I think that we expect that Imax is in units of multiple of Imin,
    > which
    > is in units of TUNIT. Is that part at least, non-controversial?



    > Imax is expressed as *doublings* of Imin, which is a tighter
    > constraint than "multiple".
    > It also represents an upper bound on the interval length.

so, if the Imax field contains "5", does that mean that
   Imax = 2^5 * Imin (* TUNIT)

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