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.” –RFC 5059

Relevant configuration

(switch(config)#) Enable PIM protocol:

router pim

(switch(config)#) Configuring static address of rendezvous point for multicast group:

ip pim rp-address 10.10.10.10
ip pim vrf default rp-address 100.100.100.100 group-list 233.3.3.3/32 bidir

(switch(config)#) Configure PIM BSR candidate:

ip pim bsr-candidate vlan 10 priority 100

(switch(config)#) Configure PIM RP candidate:

ip pim vrf default rp-candidate ethernet 1/12 group-list 225.1.0.0/16
ip pim vrf default rp-candidate ethernet 1/12 bidir

Show commands to validate functionality

show ip pim protocol

Expected results

  • The administrator can configure OSPF routing for loopback1.
  • The administrator successfully enabled PIM-SM on loopback1.
  • The administrator configured loopback1 to act as a PIM-SM RP.
  • The administrator configured the specific group prefix that will be used in the next test.
  • The administrator successfully enabled the BSR on both 8325s using loopback0 as the BSR source IP address.

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