Hi JC, Authors,
This draft is a candidate for WG LC soon, so please consider my comments
below and revise accordingly:

Section 3.1. Similarly, more than one MTMA could be
   deployed by the operator (not shown in Figure 1).

How do you avoid tunnel convergence problem if there are more than one
MTMA? You have some hints in Appendix A.3, related to Fig. 8 but it is
still not clear. Please explain it here in 3.1

Section 3.2. each MAG has a direct connection (i.e., not
   using the tunnel interface) with a multicast router.

Does MR need to be next hop? If not what happens?
Again this is later on explained on Page 15, but why not here?

3.3.  Dynamic Selection Support

This section is about MAG as a multicast router.
WG has not yet decided if MAG should be a multicast router. So this section
is out of scope. Please remove.

Section 4.2.1
Is Figure 4 really needed? Maybe remove.

4.2.2.
multicast          establishment.
               vvv  service

4.3.  MAG as multicast router

This section is also about MAG as a multicast router.
WG has not yet decided if MAG should be a multicast router. So this section
is out of scope. Please remove.

5.1.  Dynamic IP Multicast Selector Option
This option brings a lot of questions.
But more importantly, it seems to apply to the case of MAG as multicast
router which is out of scope, so please remove.
I also read the Appendix, I think it is OK.

Thanks for your hard work.

Behcet
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