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BSRneed to be supported by all router / hop-by-hop messages
candidate to become BSRrouter with bootstrap-priority ( 0= can't be elected   and 255 the highest value)
BSR Election

single BSR is elected

1- highest priority

2- highest loopback address

( in Junos: if multiple address a setup , the used one by the pim protocol: 1- primary address or the lowest IP is selected! )






all candidate RPsend c-rp-av message
BSR collect all c-rp-adv messagecreate a rp-set ( list of rp and their group )

send in the domain the rp-set in a 






Client select RP from rp-set1- Full list of RP: the most specific group > RP list2

2- RP list2: rp wit highest priority for grp > RP list 3

3- RP list3: highest hash ( grp@, IP@, mask length )  > list4

4- RP list4: Highest IP@
Configuration
BSR

set protocols pim rps bootstrap-priority  50

set protocols pim interface all mode sparse

RP

set protocols pim rp local address <loopback IP@>

set protocols pim rp local group-ranges 224.0.0.0/4

set protocols pim interface all mode sparse

all other routerset protocols pim interface all mode sparse


Show commands

show pim bootstrap