• If you have a device that borders a PIM sparse-mode domain and a dense-mode domain. If a device borders a dense-mode domain for a site, and sparse-mode is being used externally, you might want dense-mode sources to be known to the outside world. Because this device is not an RP, it would not have an RP address to use in an SA message. Therefore, this command provides the RP address by specifying the address of the interface. If both the ip msdp border sa-address and the ip msdp originator-id global configuration commands are configured, the address derived from the ip msdp originator-id command specifies the address of the RP.
Follow these steps to allow an MSDP speaker that originates an SA message to use the IP address on the interface as the RP address in the SA message: Procedure Configuring MSDP Configuring an Originating Address other than the RP Address Command or Action Purpose Step 1 enable Example: Device>enable Enables privileged EXEC mode. • Enter your password if prompted. Step 2 configure terminal Example: Device#configure terminal Enters global configuration mode. Step 3 ip msdp originator-id interface-id Example: Device(config)#ip msdp originator-id 0/1 Configures the RP address in SA messages to be the address of the originating device interface.
For interface-id, specify the interface on the local device. Step 4 end Example: Device(config)#end Returns to privileged EXEC mode. Step 5 show running-config Example: Device#show running-config Verifies your entries. Step 6 copy running-config startup-config Example: Device#copy running-config startup-config (Optional) Saves your entries in the configuration file. Configuring MSDP 23