Brocade Communications Systems IPMC5000PEF manual Statically specifying the RP

IPv4 Multicast Protocols

add a range, you override the default. The device then becomes a candidate RP only for the group address ranges you add.

You also can delete the configured rp-candidate group ranges by entering the following command.

device(config-pim-router)# rp-candidate delete 224.126.22.0 24

Syntax: [no] rp-candidate delete group-addrmask-bits

The usage of the group-addrmask-bitsparameter is the same as for the rp-candidate add command.

Updating PIM-Sparse forwarding entries with new RP configuration

If you make changes to your static RP configuration, the entries in the PIM-Sparse multicast forwarding table continue to use the old RP configuration until they are aged out.

The clear pim rp-mapcommand allows you to update the entries in the static multicast forwarding table immediately after making RP configuration changes. This command is meant to be used with rp- address command.

To update the entries in a PIM sparse static multicast forwarding table with new RP configuration, enter the following command at the privileged EXEC level of the CLI.

device(config)# clear ip pim rp-map

Syntax: clear ip pim [ vrf vrf-name] rp-map

Use the vrf option to clear the PIM sparse static multicast forwarding table for a VRF instance specified by the vrf-namevariable.

Statically specifying the RP

It is recommended that you use the PIM Sparse protocol’s RP election process so that a backup RP can automatically take over if the active RP router becomes unavailable. However, if you do not want the RP to be selected by the RP election process but instead you want to explicitly identify the RP by P address, use the rp-addresscommand.

If you explicitly specify the RP, the device uses the specified RP for all group-to-RP mappings and overrides the set of candidate RPs supplied by the BSR.

NOTE

Specify the same IP address as the RP on all PIM Sparse devices within the PIM Sparse domain. Make sure the device is on the backbone or is otherwise well connected to the rest of the network.

To specify the IP address of the RP, enter commands such as the following.

device(config)# router pim device(config-pim-router)# rp-address 207.95.7.1

Syntax: [no] rp-address ip-addr

The ip-addrparameter specifies the IP address of the RP.

The command in this example identifies the device interface at IP address 207.95.7.1 as the RP for the PIM Sparse domain. The device uses the specified RP and ignore group-to-RP mappings received from the BSR.

100	FastIron Ethernet Switch IP Multicast Configuration Guide
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