Hello Pat:

I have an open issue on the 6TiSCH architecture about the text below:

            A root is configured or obtains by some external means the 
knowledge of the RPLInstanceID
            for the TSGI. The root advertises its DagRank in the TSGI, that 
MUST be less than 0xFF,
            as its Join Priority (JP) in its IEEE802.15.4e Extended Beacons 
(EB). We'll note that the
            JP is now specified between 0 and 0x3F leaving 2 bits in the octet 
unused in the IEEE802.15.4e
            specification. After consultation with IEEE authors, it was 
asserted that 6TiSCH can make
            a full use of the octet to carry an integer value up to 0xFF.

I remember that you proposed changes to the join priority format. What will the 
final 802.15.4 2015 say about this?

Many thanks in advance!

Pascal
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