Draft: draft-ietf-ipv6-optimistic-dad-05.txt
Review: Spencer Dawkins
Date: 21 maj 2005 

Spencer Dawkins, reviewing for publication as a Proposed Standard.

Summary: This document is almost ready for publication as a Proposed
Standard. I have only a few editorial questions/comments, which
follow.

I know you guys are WAY down the path on this, but it's confusing to
new readers that "standard DAD" isn't defined - there's nothing called
DAD except optimistic DAD until Section 4.4). Maybe this is OK. I wish
the abbreviation was ODAD, though.

In Section 1.1, I would really like to see explicit numbers here -
what is the delay before an address can be used when an IPv6 node uses
ND or SLAAC, and what is the corresponding delay using optimistic DAD?
I've seen enough IETF discussion of fast handoff, etc. to suspect that
some people will be hoping this is the 50-ms fast handoff
solution... I think I can figure the numbers out from RFC 2641, but
you guys already know what you're thinking!

I'm a little confused by the text in 3.2 - up to this point,
Optimistic DAD is described as safe, so why is its use SHOULD NOT
"unless the probability of collision is exceedingly small"? Just a
sentence or two would be good, but there's no discussion of this point
until Section 4.2.

In Section 4.2, "the ON will hopefully know all it needs to know about
the router from the initial RA" is really informal text, even for a
non-normative section. Could you add a phrase detailing the kind of
things the ON hopefully knows?

Appendix A is pretty helpful, but I didn't see any reference to it in
the rest of the text. A pointer would be nice, especially somewhere
near Section 4.2, which discusses collision probability concerns.