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Re: [6tisch] Optimizing Neighbor Discovery during the join process

Michael Richardson <mcr@sandelman.ca> Tue, 24 April 2018 19:56 UTC

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From: Michael Richardson <mcr@sandelman.ca>
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Date: Tue, 24 Apr 2018 15:56:17 -0400
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Subject: Re: [6tisch] Optimizing Neighbor Discovery during the join process
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Diff: https://www.ietf.org/rfcdiff?url2=draft-richardson-6tisch-enrollment-enhanced-beacon-01

Pascal, Mališa, I have made the following changes to the Enhanced beacon draft:

                         1                   2                   3
     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |   TBD-XXX     |R|P| res |  proxy prio |    rank priority      |
    +-+-+-+-+-+-+-+-+-+-------------+-------------+-----------------+
    | pan priority  |                                               |
    +---------------+                                               +
    |                           Join Proxy lower-64                 |
    +                        (present if P=1)                       +
    |                                                               |
    +               +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |               |                                               |
    +-+-+-+-+-+-+-+-+                                               +
    |                           network ID                          |
    +                   variable length, up to 16 bytes             +
    ~                                                               ~
    +                                                               +
    |                                                               |
    +               +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |               |
    +-+-+-+-+-+-+-+-+


Perhaps someone can come up with a better description than "lower-64".
I guess maybe IID would appropriate?
I also changed the networkID to be variable length, up to 16 bytes as
we discussed in person.
I have again changed the number of bits allocated to rank priority.

What I hope is that by moving this stuff out of 6tisch-minimal security,
offering the optimization to get rid of the ND process in a 802.15.4 specific document, 
that the 6tisch-minimal-security can remain mute about this.

-- 
]               Never tell me the odds!                 | ipv6 mesh networks [ 
]   Michael Richardson, Sandelman Software Works        | network architect  [ 
]     mcr@sandelman.ca  http://www.sandelman.ca/        |   ruby on rails    [

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