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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
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
Adding Auto-RP to an Existing Sparse-Mode Cloud, page 699
Preventing Join Messages to False RPs, page 701
Filtering Incoming RP Announcement Messages, page 701
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
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
Configure a default RP as described in the
Manually Assigning an RP to Multicast Groups, page
(optional)
(optional)
Adding Auto-RP to an Existing Sparse-Mode Cloud,
and
Guidelines and Limitations, page
Manually Assigning an RP to Multicast Groups, page
699
697.
(optional)
(optional)
686.
697.
- Quick Links:
- Configuration Overview
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