comments/questions on draft-yegin-dmm-ondemand-mobility-00

Alper,

I read the draft and have few quick comments and questions. Interesting
draft by the way. In Section 3.1. it says:

  "- Access Network Anchored Address

   This type of IP address provides IP session continuity but not IP
   address reachability."

Why is that? What makes IP(v6) address unreachable (I assume from 
Internet side)? I would like to see the rationale described here
for this reachability assertion.

Then later in Section 3.1. it says:

  "The IP address is allocated by a serving IP gateway.  When the mobile"

I cannot find a proper description what a "serving IP gateway" is and
what kind of functions it is supposed to posses.

In Section 3.4. there are few things. First, it says:

  "available set of IP addresses when selecting an address.  According
   to the proposed solution, if the requested type IP address is not
   available at the time of the request, then the IP stack shall make an
   attempt to configure one such IP address.  The selected IP address"

Assuming the address configuration as per SLAAC or DHCPv6 has already
taken place within the stack, how the "attempt to configure one such IP
address" should be understood? Would it imply signaling towards network
or creation of tunnels or what? This is quite unclear to me after reading
the draft.

Second, it says:

  "shall be compliant with the requested IP address type, whether it is
   selected among available addresses or dynamically configured.  In the
   absence of a matching type (because it is not available and not
   configurable on demand), the source address selection algorithm shall
   return an empty set."

I read this as a change proposal to RFC6724 algorithm.. which part and
which rule you intend to modify/add? Since you aim to standards track
this part should be described in detail.

Last, there is no discussion how the stack/host knows what address in
unanchored/access anchored/home anchored. I would like to see some
technical discussion how that is accomplished and possibly pointers to
existing work on that area if there is some.

- Jouni