Filter
Top Products
762 | PIM Sparse-Mode
www.dell.com | support.dell.com
Elect an RP using the BSR Mechanism
Every PIM router within a domain must map a particular multicast group address to the same RP. The
group-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 a
pool of RP candidates (C-RPs).
Some routers within the domain are configured to be C-RPs. Other routers are configured to be Bootstrap
Router candidates (C-BSRs); one router is elected the BSR for the domain and is responsible for
forwarding Bootstrap messages (BSM) containing the results of the RP election to the other routers in the
domain.
The RP election process is as follows:
1. C-BSRs flood their candidacy throughout the domain in a BSM. Each message contains a BSR priority
value, 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 RP
priority 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, or
an RP failure occurs.
IPv6 Override bootstrap router RP election results
with your static RP configuration.
ipv6 pim rp-address
CONFIGURATION
IPv6 Display the assigned RP for a group.
show ipv6 pim rp
EXEC Privilege
IPv6 Display the assigned RP for a group range
(group-to-RP mapping).
show ipv6 pim rp mapping
EXEC Privilege
IP Version Task Command Syntax Command Mode
IPv4 Make a PIM router a BSR candidate.
ip pim bsr-candidate
CONFIGURATION
Make a PIM router a RP candidate.
ip pim rp-candidate
CONFIGURATION
Display Bootstrap Router information.
show ip pim bsr-router
EXEC Privilege
IPv6 Make a PIM router a BSR candidate.
ipv6 pim bsr-candidate
CONFIGURATION
Make a PIM router a RP candidate.
ipv6 pim rp-candidate
CONFIGURATION
Display Bootstrap Router information.
show ipv6 pim bsr-router EXEC Privilege
IP Version Task Command Syntax Command Mode