R21xx-HP FlexFabric 11900 IP Multicast Configuration Guide

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BSR encapsulates the RP-set information in the bootstrap messages (BSMs) and floods the BSMs to the
entire PIM-SM domain.
Figure 27 Information exchange between C-RPs and BSR
Based on the information in the RP-set, all routers in the network can select the proper RP for a specific
multicast group based on the following rules:
1. The C-RP that is designated to the smallest multicast group range wins.
2. In the case of a tie in the multicast group range, the C-RP with the highest priority wins.
3. In the case of a tie in the priority, the C-RP with the largest hash value (calculated through the
hashing algorithm) wins.
4. In the case of a tie in the hash value, the C-RP that has the highest IP address wins.