The originating-rp command configures a Rendezvous Point (RP) to use the IP address of a specified interface as the source RP address when RP creates a Source Active (SA) message. The RP is also called logical RP.
The undo originating-rp command restores the default configuration.
| Parameter | Description | Value |
|---|---|---|
| interface-type interface-number | Indicates the type and the number of an interface. | The system does not advertise routes on Multicast Tunnel Interfaces (MTIs) to private networks. Therefore, it is not recommended to use addresses of MTIs as the logical RP addresses. |
By default, the source RP address in an SA message is the actual RP address.
Usage Scenario
The originating-rp command must be run when anycast RP is configured in a PIM-SM domain.
This is because when an MSDP performs the Reverse Path Forwarding (RPF) check on a received SA message, it discards the message if the RP address in the SA message is the same as the local RP address. As a result, a logical RP address must be specified for the SA messages on each [sysname] multicast routing-enable where anycast RP is to be deployed.
Configuration Impact
After this command is run, the [sysname] multicast routing-enable replaces the source RP address in the SA message header with a logical RP address before sending the SA message. The SA message can then pass the RPF check after reaching the MSDP peer.
Precautions
The interface functioning as a logical RP cannot be an actual RP interface. Commonly, the addresses of interfaces setting up an MSDP peer relationship are configured as logical RP addresses.