Cisco IE 4000, Software Configuration Manual

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Configuring IP Multicast Routing
Configuring IP Multicast Routing
EXAMPLE
This example shows how to configure the address of the RP to 147.106.6.22 for multicast group 225.2.2.2 only:
Switch(config)# access-list 1 permit 225.2.2.2 0.0.0.0
Switch(config)# ip pim rp-address 147.106.6.22 1
Configuring Auto-RP
Auto-RP uses IP multicast to automate the distribution of group-to-RP mappings to all Cisco routers and multilayer
switches in a PIM network. It has these benefits:

It is easy to use multiple RPs within a network to serve different group ranges.

It provides load splitting among different RPs and arrangement of RPs according to the location of group participants.

It avoids inconsistent, manual RP configurations on every router and multilayer switch in a PIM network, which can
cause connectivity problems.
Note: If you configure PIM in sparse mode or sparse-dense mode and do not configure Auto-RP, you must manually
configure an RP as described in the Manually Assigning an RP to Multicast Groups, page 697 .
Note: If routed interfaces are configured in sparse mode, Auto-RP can still be used if all devices are configured with a
manual RP address for the Auto-RP groups.
These sections describe how to configure Auto-RP:

Setting up Auto-RP in a New Internetwork, page 699 (optional)

Adding Auto-RP to an Existing Sparse-Mode Cloud, page 699 (optional)

Preventing Join Messages to False RPs, page 701 (optional)

Filtering Incoming RP Announcement Messages, page 701 (optional)
Setting up Auto-RP in a New Internetwork
If you are setting up Auto-RP in a new internetwork, you do not need a default RP because you configure all the interfaces
for sparse-dense mode. Follow the process described in the
Adding Auto-RP to an Existing Sparse-Mode Cloud,
page 699 . However, omit Step 3 if you want to configure a PIM router as the RP for the local group.
Adding Auto-RP to an Existing Sparse-Mode Cloud
This section contains some suggestions for the initial deployment of Auto-RP into an existing sparse-mode cloud to
minimize disruption of the existing multicast infrastructure. This procedure is optional.
BEFORE YOU BEGIN

Review the Auto-RP, page 679 and Guidelines and Limitations, page 686 .

Configure a default RP as described in the Manually Assigning an RP to Multicast Groups, page 697 .