PIM-SM Bootstrap Router (BSR) and Rendezvous Point (RP)
“Every PIM multicast group needs to be associated with the IP address of a Rendezvous Point (RP) […] For all senders to reach all receivers, it is crucial that all routers in the domain use the same mappings of group addresses to RP addresses. […] The BSR mechanism provides a way in which viable group-to-RP mappings can be created and rapidly distributed to all the PIM routers in a domain.” –rfc5059
Configuration Commands
Configure the BSR and RP
switch(config)# router pim
switch(config-pim)# bsr-candidate source-ip-interface IFACE
switch(config-pim)# rp-candidate source-ip-interface IFACE
Show commands to validate functionality:
show ip pim bsr
show ip pim rp-candidate
show ip pim rp-set
Test Steps
- Use the previous IGMP, MSDP configuration and topology.
- On both Core Switches create loopback1 interface using the same IP address for both devices.
- Enable OSPF on loopback interface and make sure route redistribution is configured.
- Enable PIM-SM on loopback1
- Configure loopback1 to act as RP for both 8325s using: rp-candidate source-ip-interface loopback1
- Configure both core devices to advertise the same specific multicast subnet (which we will use later) by typing “rp-candidate group-prefix 239.1.1.0/24”.
- Enable BSR on both routers using: bsr-candidate source-ip-interface loopback0 in the router pim context.
Expected Results
- Administrators can configure loopback1 on both 8325s using the same IP address
- Administrators can configure OSPF routing for loopback1
- Administrators successfully enabled PIM-SM on loopback1
- Administrators configured loopback1 to act as a PIM-SM RP
- Administrators configured the specific group-prefix that will be used in the next test
- Administrators successfully enabled the BSR on both 8325s using loopback0 as the BSR source IP
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