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DNA bit - which bit should we be using? 

For the DNA bit in the RA header, the draft says:

     0                   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
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |     Type      |     Code      |          Checksum             |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    | Cur Hop Limit |M|O|H|Pr |?|D|R|       Router Lifetime         |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |                         Reachable Time                        |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |                          Retrans Timer                        |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    +   Options ...
    +-+-+-+-+-+-+-+-+-+-+-+-

R = Reserved

I think bit 13 of the second word is in use for something, but can't
remember what.  Does anyone know?

DNA bit is bit 14 of the second word - Is this ok?

Discussion

Brett 

No comments on this one, so far.  Maybe I was mistaken and bit 13 is
not in use - I can't find it.  If so, maybe the DNA bit can be bit 13
and bit 14 could be used in place of the prefix count in the DNAO since
that seems to have lost favour.

Brett.

Brett Pentland wrote:

> For the DNA bit in the RA header, the draft says:
>
>      0                   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
>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>     |     Type      |     Code      |          Checksum             |
>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>     | Cur Hop Limit |M|O|H|Pr |?|D|R|       Router Lifetime         |
>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>     |                         Reachable Time                        |
>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>     |                          Retrans Timer                        |
>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>     +   Options ...
>     +-+-+-+-+-+-+-+-+-+-+-+-
>
> R = Reserved
>
> I think bit 13 of the second word is in use for something, but can't
> remember what.  Does anyone know?
>
> DNA bit is bit 14 of the second word - Is this ok?

-- Main.BrettPentland - 18 Apr 2005

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