Users Guide

To congure a static RP:
OS10# configure terminal
OS10(config)# ip pim rp-address 171.1.1.1 group-address 225.1.1.3/32
Override bootstrap router updates
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 congure an IP address for the
RP. If you congure a static RP for a group, to override BSR updates with the static RP conguration, use the override option in the ip
pim rp-address command. If you do not explicitly use the override option and:
• The prex length of the static RP is the same as the RP advertised in the BSR updates, the BSR RP takes precedence over the
statically congured RP.
• If the prex length of the static RP and the BSR RP does not match, OS10 selects the router having the longest-match prex 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
NOTE: If you have enabled the override option, conguring static RP without using the override option does not remove
the override conguration. You must delete the static RP conguration using the override option and then recongure static
RP again.
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
Congure dynamic RP using the BSR mechanism
You can congure a subset of PIM routers within the domain as candidate BSRs (C-BSRs). The C-BSRs exchange bootstrap messages
(BSM) to elect the BSR. The BSR informs its status to all the routers.
Every PIM router within a domain must map a particular multicast group address to the same RP. With BSR, group-to-RP mapping is
dynamic. You can congure a subset of routers within a domain as C-RPs. Each PIM router selects an RP for a multicast group from the list
of group-to-RP mappings learnt from the BSR messages.
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Multicast