What is determined by running the same hash algorithm on all PIMv2 routers?
A.
The SPT from the RP to the multicast source
B.
The SPT from the last hop router to the multicast source
C.
Auto RP election
D.
Which BSR to use for a particular multicast group
E.
Which RP to use from a set of candidate RPs in the RP set
Bootstrap Router (BSR) – an IETF standards mechanism available in PIMv2. One router is elected as the BSR from a collection of candidate BSRs.
Candidate-RPs unicast candidate-RP announcements to the BSR. BSR IP learned from periodic BSR messages. BSR stores all candidate-RP announcements in a database called the RP set. RP set is flooded to the all PIM routers group of 224.0.0.13 with a TTL of 1. RPF check done on BSR message before flooding it out all PIM-enabled interfaces.
Routers that receive the BSR message perform a hash on the RP set. Routers will select the same RP for a given group range.
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The hashing algorithm permits multiple candidate RPs to load-balance the duties of the RP across a range of groups. Only one candidate RP will be selected as the RP for any single group in the group range. However, the hash algorithm may select other candidate RPs as the RP for another group within the group range.
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