routers, the candidate having the highest IP address becomes the domain's BSR. Zero (0) is the lowest priority.
To make BSR selection easily predictable, use this command to assign a different priority to each candidate BSR
in the PIM-SM domain.
(Default: 0; Range 0–255)
NOTE:
Disabling PIM-SM on the elected BSR or disabling the C-BSR functionality on the elected
BSR causes the router to send a Bootstrap Message (BSM) with a priority setting of 0 to trigger a
new BSR election. If all BSRs in the domain are set to the default priority (0), the election will fail
because the result is to re-elect the BSR that has become unavailable. For this reason, it is
recommended that all C-BSRs in the domain be configured with a
bsr-candidate priority
greater than 0.
Changing the distribution
Changing the distribution of multicast groups across a domain.
Syntax:
bsr-candidate hash-mask-length [1-32]
[no] router pim bsr-candidate hash-mask-length [1-32]
Controls distribution of multicast groups among the C-RPs in a domain where there is overlapping coverage of the
groups among the RPs. This value specifies the length (number of significant bits) taken into account when
allocating this distribution. A longer
hash-mask-length
results in fewer multicast groups in each block of group
addresses assigned to the various RPs. Because multiple blocks of addresses are typically assigned to each C-
RP, this results in a wider dispersal of addresses and enhances load-sharing of the multicast traffic of different
groups being used in the domain at the same time.
(Default: 30; Range 1–32)
Changing the message interval
Changing the BSR message interval.
Syntax:
bsr-candidate bsm-interval [5-300]
[no] bsr-candidate bsm-interval [5-300]
Specifies the interval in seconds for sending periodic RP-Set messages on all PIM-SM interfaces on a router
operating as the elected BSR in a domain.
NOTE:
This setting must be smaller than the
rp-candidate hold-time
settings (range of 30 to 255;
default 150) configured in the RPs operating in the domain.
(Default: 60; Range 5–300)
Configuring C-RPs on PIM-SM routers
An RP candidate advertises its availability, IP address, and the multicast group or range of groups it supports. The
commands in this section are used to configure C-RP operation. The sequence of steps is as follows:
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Aruba 3810 / 5400R Multicast and Routing Guide for ArubaOS-
Switch 16.08
