Dear Juan, Wen, Wei,

Please, find here below some comments on your draft.

1/ You propose the MAGs to be multicast enabled routers. However, to enabling 
the solution you propose to set-up a tunnel among the MAGs where the source and 
the listener are attached to. Why do you need such tunnel? Why the 
communication cannot be directly routed without any additional tunnel (assuming 
the domain is multicast enabled)? In fact the tunnel probably will follow the 
same path as the PIM messages would follow.

2/ When you describe the establishment of bidirectional tunnels between MAGs 
you refer RFC5213 for further detail, but RFC5213 does not include tunnel 
establishment between MAGs. This is not covered by standard PMIP (it implies an 
extension).

3/ For the mobile node operation you are restricting the optimization proposal 
to the case where the listener is an SSM-aware host. In my opinion this 
restricts the solution, not being generic (ASM case is not covered)

4/ Through the PBU-Q/PBA-Q sequence of messages you are able to obtain the CoA 
for the MN source. However, how do you know in advance that the MN source is 
attached to the domain? There is no way of knowing it in advance, and because 
the MN HoA is not an address of the PMIPv6 domain, how do you deduce that it is 
a MN source? Do you send the PBU-Q for all kind of SSM subscriptions? 
Additionally, what happens (what is the message) in case the source is 
effectively not attached to the PMIPv6 domain?

Finally, as a minor comment, the heading of the txt file mention "RELOAD Client 
Extension", which is not the subject of the draft.

Best regards,

Luis

_____________________________
Luis M. Contreras
Technology / Global CTO / Telefónica
Efficiency Projects / Telefónica I+D

Don Ramón de la Cruz 82-84
28006 Madrid
España / Spain

[email protected]


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