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Forum Replies

  1. Hi Suman,

    With dense mode flooding, the router will flood the original IP multicast packet that it receives on one interface on other PIM enabled interfaces.

    The hop-by-hop behavior of BSR is a bit similar but these packets have a TTL of 1. When the router receives these packets, it replicates the receiving packet and sends a new packet (with the same information) on its PIM enabled interfaces.

    Rene

  2. Got a question about the hash mask - wouldn’t it always be best to use a 31 bit hash mask?

    That way one group will be assigned per RP, then it “rolls over” back to the first RP etc.

  3. Hi Rene,

    I have one question. Can we implement both RP & BSR on the same router? Also, can we do the same thing with Cisco Auto-RP (RP & Mapping Agent on the same router)?

    Thank you,
    Minh

  4. Hello Minh,

    You can enable Auto-RP & BSR (and static RP) on the same router yes. Here’s a quick example:

    R1#show ip pim rp mapping
    PIM Group-to-RP Mappings
    
    Group(s) 224.0.0.0/4
      RP 2.2.2.2 (?), v2v1
        Info source: 2.2.2.2 (?), elected via Auto-RP
             Uptime: 00:00:23, expires: 00:02:32
      RP 4.4.4.4 (?), v2
        Info source: 4.4.4.4 (?), via bootstrap, priority 0, holdtime 150
             Uptime: 00:02:11, expires: 00:02:11
    

    R2 advertises itself as an RP with Auto-RP, R4 with BSR. R1 seems to prefer Auto-RP.

    Interesting to know is that with RP selection, th

    ... Continue reading in our forum

  5. simply outstanding
    Thanks

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