[pim] [PIM-SM] UpstreamJPState, SwitchToSptDesire and re-join

[huajun Lee <bestleehj at gmail.com>]

 Hi,

    At the DR, when one source sent (S,G)data  to  the DR(interface E1)

         

         follow the 4.4.1 on page 37

               DownstreamJPState(S,G, E1) =Join

               immediate_olist(S,G) and inherited_olist(S,G)  (+) E1

         So the UpstreamJPState(S,G,E1) = Join, then Send Join(S,G), 

         Does it lack some description for not doing Send  ? So dose it at RP when a Join(*,G) arrived.         

      

         Need DR  creat (*,G)state before creat(S,G)?

  

   At the 27th page of the rfc4601

        SwitchToSptDesired(S,G) return true once a single packet has been received for the source and group

    is that mean: (S,G)data can be received on the interface I ( I != RPF(S) )

 

  At page 42   4.4.2

       packet_arrives_on_rp_tunnel(pkt){

             }

  

       where do the RP re-join  SPT?

 

thanks and regards,

Spark Lee