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Re: [6lo] Last Call: <draft-ietf-6lo-6lobac-06.txt> (Transmission of IPv6 over MS/TP Networks) to Proposed Standard

2017-02-28 12:53:08
Kerry Lynn <kerlyn(_at_)ieee(_dot_)org> writes:
Thanks for your thorough review of draft-ietf-6lo-6lobac.  Sorry that
it has taken so long to get back to you.  Can you take a look at the
new version and see if it addresses your concerns?  Comments inline...

Yes, the -07 cleans up all my concerns.

Section 6 has been reworked to more clearly distinguish between two types
of IIDs: "MAC-address-derived" and "semantically opaque".  The first is
recommended for link-local addresses because it enables maximum IPv6
header compression efficiency.  Since MS/TP is used primarily as a field
bus, I expect most installations will only ever involve link-local traffic
between an MS/TP device and a local controller.

For applications where the MS/TP device is a client or server with routable
addresses, the spec strongly recommends generating a semantically opaque
IID, with 64 bits of entropy, for each global address.

Ah, yes, that's the distinction that makes it clear.

ANSI/ASHRAE Standard 135-2016 was published late last year.  This
version integrates the changes that were standardized in 135-2012
Addendum an, so there's no longer any jumping back and forth between
references.

And so you simplified the references to Std. 135 .

Dale

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