Configuring IP Multicast Routing

Advanced PIM Features Configuration Task List

Dense Mode

Dense mode groups in a mixed Version 1/Version 2 region need no special configuration; they will interoperate automatically.

Sparse Mode

Sparse mode groups in a mixed Version 1/Version 2 region are possible because the Auto-RP feature in Version 1 interoperates with the RP feature of Version 2. Although all PIM Version 2 routers also can use Version 1, we recommend that the RPs be upgraded to Version 2 (or at least upgraded to PIM Version 1 in the Cisco IOS Release 11.3 software).

To ease the transition to PIM Version 2, we also recommend the following configuration:

Auto-RP be used throughout the region

Sparse-dense mode be configured throughout the region

If Auto-RP was not already configured in the PIM Version 1 regions, configure Auto-RP. See the section “Configuring Auto-RP earlier in this chapter.

Monitoring the RP Mapping Information

To monitor the RP mapping information, use the following commands in EXEC mode as needed:

Command

Purpose

 

 

Router# show ip pim bsr

Displays information about the currently elected BSR.

 

 

Router# show ip pim rp-hash [group-address

Displays the RP that was selected for the specified group.

group-name]

 

 

 

Router# show ip pim rp mapping [rp-address]

Displays how the router learns of the RP (via bootstrap or

 

Auto-RP mechanism).

 

 

Advanced PIM Features Configuration Task List

To configure PIM features, perform the optional tasks described in the following sections:

Delaying the Use of PIM Shortest-Path Tree (Optional)

Assigning an RP to Multicast Groups (Optional)

Increasing Control over RPs (Optional)

Modifying the PIM Router Query Message Interval (Optional)

Limiting the Rate of PIM Register Messages (Optional)

Configuring the IP Source Address of Register Messages (Optional)

Enabling Proxy Registering (Optional)

Enabling PIM Nonbroadcast Multiaccess Mode (Optional)

Cisco IOS IP Configuration Guide

IPC-422

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Cisco Systems 78-11741-02 manual Advanced PIM Features Configuration Task List, Dense Mode, Sparse Mode, IPC-422