ip pim rp-address
ip pim rp-address ip-address[group-access-list-number] [override]
no ip pim rp-address ip-address [group-access-list-number]
IP address of a router to be a PIM RP. This is a unicast IP address in four-part, dotted notation.
(Optional) Number of an access list that defines for which multicast groups the RP should be used. This is a standard IP access list. The number can be from 1 to 100.
(Optional) Indicates that if there is a conflict between the RP configured
with this command and one learned by Auto-RP, the RP configured with this command prevails.
To configure the address of a PIM rendezvous point (RP) for a particular group, use the ip pim rp-address global configuration command. To remove an RP address, use the no form of this command. You must configure the IP address of RPs on all routers (including the RP router).
First-hop routers send register packets to the RP address on behalf of source multicast hosts. Routers also use this address on behalf of multicast hosts that want to become members of a group. These routers send Join and Prune messages towards the RP. The RP must be a PIM router; however, it does not require any special configuration to recognize that it is the RP. RPs are not members of the multicast group. They serve as a "meeting place" for multicast sources and group members.
You can configure the Cisco IOS software to use a single RP for more than one group. The conditions specified by the access list determine which groups the RP can be used for. If no access list is configured, the RP is used for all groups.
A PIM router can use multiple RPs, but only one per group.
If there is no RP configured for a group, the router will treat the group as dense using the dense-mode PIM techniques.
If the RP for a group is learned through a dynamic mechanism, such as Auto-RP, then this command might not be required. If there is a conflict between the RP configured with this command and one learned by Auto-RP, the Auto-RP information is used, unless the override keyword is specified.
The following example sets the PIM RP address to 184.108.40.206 for all multicast groups:Router(config)#ip pim rp-address 220.127.116.11
The following example sets the PIM RP address to 18.104.22.168 for the multicast group 22.214.171.124 only:Router(config)#access list 1 126.96.36.199 0.0.0.0 Router(config)#ip pim rp-address 188.8.131.52 1
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