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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.


  2. 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
      RP (?), v2v1
        Info source: (?), elected via Auto-RP
             Uptime: 00:00:23, expires: 00:02:32
      RP (?), v2
        Info source: (?), 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

  3. simply outstanding

  4. Hi Tony Ellis,

    I just made some changes, you are right this is confusing. In RFC5059 they state it like this:

    BSR Priority
    Contains the BSR priority value of the included BSR. This field
    is considered as a high-order byte when comparing BSR addresses.
    BSRs should by default set this field to 64. Note that for
    historical reasons, the highest BSR priority is 255 (the higher
    the better), whereas the highest RP Priority (see below) is 0
    (the lower the better).

    They talk about highest priority for BSR and RP selection, but for BSR highest priority means the hig

    ... Continue reading in our forum

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