Configuring Bidirectional PIM
Bidir-PIM Configuration Task List
IPC-475
Cisco IOS IP Configuration Guide
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:
To configure bidir-PIM, use the following commands in global configuration mode, depending on which
method you use 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.
Command Purpose
Router(config)# ip pim bidir-enable Enables bidir-PIM on a router.
Command Purpose
Router(config)# ip pim rp-address rp-address
[access-list] [override] bidir
Configures the address of a PIM RP for a particular group, and
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
[group-list access-list] bidir
Configures the router to advertise itself as a PIM Version2
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
scope ttl-value [group-list access-list] [interval
seconds] bidir
Configures the router to use Auto-RP to configure for which
groups the router is willing to act as RP, and specifies
bidirectional mode. Use this command when you are using
Auto-RP to distribute group-to-RP mappings.