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Forum Replies

  1. If the DR has received a register stop from the RP because the RP the does not have any receivers.

    Then how does it restart back again?
    does the whole process wait for a receiver to send a pim join to the RP,
    then the RP sends a join back to the source ?

    During the registration process do the unicast encapsulated packets get sent to the receiver
    at the same time as the RP is establishing the SPT back to the source?
    so during that time you can get duplicate packets and dropped packets

  2. Hi Jeffrey,

    Once the DR receives the register stop, it will start a 60 second “register suppression” timer. During this time, it will not forward any PIM register messages to the RP. Five seconds before the timer expires, it will send a “null register” message to the RP. Now there are two options:

    Option 1) The RP still doesn’t have anyone that is interested in the multicast stream, if so it will send another register stop message and the DR will reset its suppression time.

    Option 2) If the RP does have receivers, it won’t send anything to the DR. The DR its ti

    ... Continue reading in our forum

  3. Also, the PING stopped at the end

    R1#ping repeat 100000
    Type escape sequence to abort.
    Sending 100000, 100-byte ICMP Echos to, timeout is 2 seconds:
    PIM(0): Building Periodic (*,G) Join / (S,G,RP-bit) Prune message for

    Any reasoning behind it?

  4. Hi Nagender,

    In my example, I don’t have a loopback interface on R2. Only R3 has one since it’s the RP of this network.

    R1 and R4 are the source and receiver, I’m using routers but these are only used as host devices. That’s why you don’t need PIM on their interfaces, you could also replace them with windows/linux computers. Make sure you have PIM enabled on the routers that are facing your hosts (R2 and R3).


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