Manual RP Configuration

Manual RP Configuration
The syntax for the manual RP configuration command is simple: ip pim rp-address ip_
address group_access_list_number [override]. The ip_address is the IP address of the
TABLE 1 9 . 3 Interface Activation Criteria for Sparse-Dense-Mode Interfaces
Criteria Mode of Operation
Directly connected group members or DVMRP neighbors Sparse and dense
Non-pruned PIM neighbors Dense
Join request received Sparse
626 Chapter 19  Understanding and Configuring Multicast Operation
router that is the RP. The access_list_number is for a standard IP access list (1–99) or an
expanded range from 1300 to 1999. These lists are used to define which multicast groups can
or cannot use this RP. If no access list is specified, all multicast groups will use the configured
RP. Finally, the override option can be used to override any RP information that might be
learned via an Auto-RP update. The static RP takes precedence over any Auto-RP-learned RP.
Here is a sample configuration for manual RP configuration:
Terry_3640#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Terry_3640(config)#ip pim rp-address 172.16.1.253 50 override
Terry_3640(config)#^Z
Terry_3640#
Here is a look at the router after the execution. Notice that the command is a global command.
Following the global configuration, you will see access-list 50. The list allows only groups
within the range of 224.0.0.0 to 224.255.255.255 to use 172.16.1.253 as the RP. Other groups need
Auto-RP information or another statically configured RP in order to work properly:
!
no ip classless
ip route 0.0.0.0 0.0.0.0 172.16.22.2
ip pim rp-address 172.16.1.253 50 override
!
access-list 50 permit 224.0.0.0 0.255.255.255
access-list 50 deny any
!