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Multicast routing protocols



Hi, ns-users

I have several questions about multicast routing protocol,

(1) Is there a detailed PIM-SM multicast routing protocol implemented in ns2?
(2) Is CtrMcast protcol only performing session simulation, and there is no detailed protocol simulation by CtrMcast? 
(3) Which protocol is a variant of PIM-SM? CtrMcast? or ???
(4) What is it under directory ../../tcl/pim? Pim-SM or PIM-DM? What about those files under directory ../../tcl/mcast?

Tks,

shuqian