Dell Brocade DCX, Configuration Manual

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BigIron RX Series Configuration Guide 601
53-1001810-01
PIM Sparse
23
Configuring RPs
Enter a command such as the following to configure the device as a candidate RP.
BigIron RX(config-pim-router)# rp-candidate ethernet 2/2
Syntax: [no] rp-candidate ethernet <slot> / <portnum> | loopback <num> | ve <num>
The ethernet <slot> / <portnum> | loopback <num> | ve <num> parameter specifies the interface.
The device will advertise the specified interface’s IP address as a candidate RP.
•
Enter ethernet <slot> / <portnum> for a physical interface (port).
•
Enter ve <num> for a virtual interface.
•
Enter loopback <num> for a loopback interface.
By default, this command configures the device as a candidate RP for all group numbers beginning
with 224. As a result, the device is a candidate RP for all valid PIM Sparse group numbers. You can
change this by adding or deleting specific address ranges. The following example narrows the
group number range for which the device is a candidate RP by explicitly adding a range.
BigIron RX(config-pim-router)# rp-candidate add 224.126.0.0 16
Syntax: [no] rp-candidate add <group-addr> <mask-bits>
The <group-addr> <mask-bits> specifies the group address and the number of significant bits in
the subnet mask. In this example, the device is a candidate RP for all groups that begin with
224.126. When you 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 change the group numbers for which the device is a candidate RP by deleting address
ranges. For example, to delete all addresses from 224.126.22.0 – 224.126.22.255, enter the
following command.
BigIron RX(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-addr> <mask-bits> parameter is the same as for the rp-candidate add
command.
If you enter both commands shown in the example above, the net effect is that the device becomes
a candidate RP for groups 224.126.0.0 – 224.126.21.255 and groups 224.126.23.0 –
224.126.255.255.
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.
BigIron RX(config)# clear pim rp-map
Syntax: clear pim rp-map