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Customizing Protocol Independent Multicast
117355-D Rev 00
6-5
For information about customizing C-RP configuration parameters, see
Modifying the Candidate RP Configuration
” on page 6-26.
Bootstrap Router
The bootstrap router (BSR) receives RP advertisement messages from the C-RPs
and adds the RP with its group prefix to the RP set. The BSR periodically sends
the RP set in bootstrap messages to all routers in the PIM domain. The BSR
ensures that all PIM routers learn which RP to send PIM join/prune and register
packets to. Only one BSR exists for each PIM domain.
For information about configuring a router as a BSR, see “Starting PIM” on page
2-7.
Candidate Bootstrap Routers
Within a PIM domain, you can configure a small set of routers as candidate BSRs.
PIM elects the C-BSR with the highest configured priority as the BSR for the
domain. If two C-BSRs have equal priority, then PIM elects the C-BSR with the
higher IP address as the BSR for the domain. When you add a new C-BSR with a
higher priority to the domain, a new BSR is elected automatically.
For information about customizing BSR configuration parameters, see
Modifying the Candidate BSR Configuration
” on page 6-25.
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