Dell EMC SmartFabric OS10 User Guide Release 10.5.0

A bootstrap router (BSR) is a router in a PIM domain that helps to automatically discover the Rendezvous Point (RP) for a given multicast group in a multicast network. PIM routers use the BSR to obtain the RP IP address. You can also statically configure an IP address for the RP. If you configure a static RP for a group, to override BSR updates with the static RP configuration, use the override option in the ip pim rp-address command. If you do not explicitly use the override option and:

• The prefix length of the static RP is the same as the RP advertised in the BSR updates, the BSR RP takes precedence over the statically configured RP.
• If the prefix length of the static RP and the BSR RP does not match, OS10 selects the router having the longest-match prefix as the RP.

To override BSR updates:

OS10# configure terminal
OS10(config)# ip pim rp-address 20.1.1.1 255.1.2.3/24 override

To view the RP for a multicast group, use the show ip pim rp command.

OS10# show ip pim rp
Group                  RP
---------------------------------
225.1.1.1           171.1.1.1
225.1.1.2           171.1.1.1
225.1.1.3           171.1.1.1
225.1.1.4           171.1.1.1
225.1.1.5           171.1.1.1
225.1.1.6           171.1.1.1

To view the RP for a multicast group range, use the show ip pim rp mapping command.

OS10# show ip pim rp mapping
PIM Group-to-RP Mappings
Group(s): 230.1.1.1/32  
RP:14.1.1.1, v2
  Info source: 42.1.1.1, via bootstrap, priority 255
     expires: 00:01:53

Group(s): 231.1.1.1/32
RP: 9.1.1.1, v2
  Info source: 42.1.1.1, via bootstrap, priority 254
     expires: 00:01:54