762 | PIM Sparse-Modew w w . d e l l . c o m | s u p p o r t . d e l l . c o mElect an RP using the BSR MechanismEvery PIM router within a domain must map a particular multicast group address to the same RP. Thegroup-to-RP mapping may be statically or dynamically configured. RFC 5059 specifies a dynamic,self-configuring method called the Bootstrap Router (BSR) mechanism, by which an RP is elected from apool of RP candidates (C-RPs).Some routers within the domain are configured to be C-RPs. Other routers are configured to be BootstrapRouter candidates (C-BSRs); one router is elected the BSR for the domain and is responsible forforwarding Bootstrap messages (BSM) containing the results of the RP election to the other routers in thedomain.The RP election process is as follows:1. C-BSRs flood their candidacy throughout the domain in a BSM. Each message contains a BSR priorityvalue, and the C-BSR with the highest priority value becomes the BSR.2. Each C-RP unicasts periodic Candidate-RP-Advertisements to the BSR. Each message contains an RPpriority value and the group ranges for which it is a C-RP.3. The BSR determines the most efficient and stable group-to-RP mappings, which is called the RP-Set.4. The BSR floods the RP-Set throughout the domain periodically in case new C-RPs are announced, oran RP failure occurs.IPv6 Override bootstrap router RP election resultswith your static RP configuration. ipv6 pim rp-address CONFIGURATIONIPv6 Display the assigned RP for a group. show ipv6 pim rp EXEC PrivilegeIPv6 Display the assigned RP for a group range(group-to-RP mapping). show ipv6 pim rp mapping EXEC PrivilegeIP Version Task Command Syntax Command ModeIPv4 Make a PIM router a BSR candidate. ip pim bsr-candidate CONFIGURATIONMake a PIM router a RP candidate. ip pim rp-candidate CONFIGURATIONDisplay Bootstrap Router information. show ip pim bsr-router EXEC PrivilegeIPv6 Make a PIM router a BSR candidate. ipv6 pim bsr-candidate CONFIGURATIONMake a PIM router a RP candidate. ipv6 pim rp-candidate CONFIGURATIONDisplay Bootstrap Router information. show ipv6 pim bsr-router EXEC PrivilegeIP Version Task Command Syntax Command Mode
