draft-liu-magma-igmpv3-mldv2-lite-00.txt

    I am not on this list and sorry if I will be repeating what others may
    have stated (because I haven't seen any of them) but here is my brief 
    comment on this draft.

    I think this is a good effort. This has been confusing for many years
    and we don't need more obstacles from getting more multicast deployed.

    Specific comments:

    1) Don't use the term ASM in the draft. Refer to "Exclude(NULL)" as  
       joining a (*,G) entry rather than a specific (Si,G) entry. Same
       for the "Include(All)" case.

    2) I think IGMPv3-Lite can be made much simpler and still serve a useful
       purpose. It's good that Change-to-* record types are not recommended,
       but I believe Allow-new-sources and Block-old-sources are not needed
       either. Why not just have:

      o  Current-State-Include, where when the source count is non-zero, it
         is the host joining the various (Si,G), where each Si is in the source
         list. When the source count is zero, the host is joining (*,G).

      o  Current-State-Exclude, where when the source count is non-zero, it
         is the host leaving the various (Si,G), where each Si is in the source
         list. When the source count is zero, the host is leaving (*,G).

    This would make the protocol machinery and implementations work more like
    IGMPv2/MLDv1 and think it would be compatible with popular application
    uses.

    Comments?

Dino