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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
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Chapter 34 Configuring IP Multicast Routing
Configuring IP Multicast Routing
To disable multicasting, use the no ip multicast-routing distributed global configuration command. To
return to the default PIM version, use the no ip pim version interface configuration command. To
disable PIM on an interface, use the no ip pim interface configuration command.
Configuring a Rendezvous Point
You must have an RP if the interface is in sparse-dense mode and if you want to treat the group as a sparse
group. You can use several methods, as described in these sections:
• Manually Assigning an RP to Multicast Groups, page 34-11
• Configuring Auto-RP, page 34-12 (a standalone, Cisco-proprietary protocol separate from PIMv1)
• Configuring PIMv2 BSR, page 34-16 (a standards track protocol in the Internet Engineering Task
Force (IETF)
You can use Auto-RP, BSR, or a combination of both, depending on the PIM version you are running
and the types of routers in your network. For more information, see the “PIMv1 and PIMv2
Interoperability” section on page 34-8 and the “Auto-RP and BSR Configuration Guidelines” section on
page 34-8.
Step 5
ip pim version [1 | 2] Configure the PIM version on the interface.
By default, Version 2 is enabled and is the recommended setting.
An interface in PIMv2 mode automatically downgrades to PIMv1 mode
if that interface has a PIMv1 neighbor. The interface returns to Version 2
mode after all Version 1 neighbors are shut down or upgraded.
For more information, see the “PIMv1 and PIMv2 Interoperability”
section on page 34-8.
Step 6
ip pim {dense-mode | sparse-mode |
sparse-dense-mode}
Enable a PIM mode on the interface.
By default, no mode is configured.
The keywords have these meanings:
• dense-mode—Enables dense mode of operation.
• sparse-mode—Enables sparse mode of operation. If you configure
sparse-mode, you must also configure an RP. For more information,
see the “Configuring a Rendezvous Point” section on page 34-10.
• sparse-dense-mode—Causes the interface to be treated in the mode
in which the group belongs. Sparse-dense-mode is the recommended
setting.
Note After you enable a PIM mode on the interface, the ip
mroute-cache distributed interface configuration command is
automatically entered for the interface and appears in the running
configuration.
Step 7
end Return to privileged EXEC mode.
Step 8
show running-config Verify your entries.
Step 9
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
