Brocade FastIron Ethernet Switch IP Multicast Configuration Guide - Manual (Page 102)

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-addr mask-bits
The usage of the group-addrmask-bits parameter 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-map command 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-name variable.
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-address command.
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-addr parameter 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.
IPv4 Multicast Protocols
100 FastIron Ethernet Switch IP Multicast Configuration Guide
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