Cisco Systems 78-11741-02 manual Configuring Bidir-PIM, Verifying Bidirectional Groups, IPC-475

Configuring Bidirectional PIM

Bidir-PIM Configuration Task List

Configuring Bidir-PIM

Most of the configuration requirements for bidir-PIM are the same as those for configuring PIM-SM. You need not enable or disable an interface for carrying traffic for multicast groups in bidirectional mode. Instead, you configure which multicast groups you want to operate in bidirectional mode. Similar to PIM-SM, this configuration can be done via Auto-RP, static RP configurations, or the PIM Version 2 bootstrap router (PIMv2 BSR) mechanism.

To enable bidir-PIM, use the following command in global configuration mode:

Command	Purpose
Router(config)# ip pim bidir-enable	Enables bidir-PIM on a router.

To configure bidir-PIM, use the following commands in global configuration mode, depending on which method you use to distribute group-to-RP mappings:

Command	Purpose
Router(config)# ip pim rp-address rp-address	Configures the address of a PIM RP for a particular group, and
[access-list] [override] bidir	specifies bidirectional mode. Use this command when you are
	not distributing group-to-RP mappings using either Auto-RP or
	the PIMv2 BSR mechanism.
Router(config)# ip pim rp-candidate type number	Configures the router to advertise itself as a PIM Version 2
[group-list access-list]bidir	candidate RP to the BSR, and specifies bidirectional mode. Use
	this command when you are using the PIMv2 BSR mechanism
	to distribute group-to-RP mappings.
Router(config)# ip pim send-rp-announce type number	Configures the router to use Auto-RP to configure for which
scope ttl-value[group-list access-list] [interval	groups the router is willing to act as RP, and specifies
seconds] bidir	bidirectional mode. Use this command when you are using
	Auto-RP to distribute group-to-RP mappings.

See the “Bidir-PIM Configuration Example” section later in this chapter for an example of how to configure bidir-PIM.

Verifying Bidirectional Groups

To verify configuration of bidirectional groups, use the following show commands:

•To examine RP-to-group mappings and determine the bidirectional groups advertised by an RP, use the show ip pim rp mapping command in EXEC mode.

•To display the IP multicast routing table information for groups operating in bidirectional mode, sparse mode, and dense mode, use the show ip mroute command in EXEC mode.

•To display information about the elected DF for each RP of an interface and the metric associated with the DF, use the show ip pim interface df command in EXEC mode.

Cisco IOS IP Configuration Guide

IPC-475