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Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter24 Configuring IP Multicast Routing
Configuring IP Multicast Routing
To disable multicasting, use the no ip multicast-routing global configuration command. To return to
the default PIM version, use the no ip pim version interface configurat ion c om mand. To disable PIM
on an interface, use the no ip pim interface configuration command.
Step3 interface interface-id Enter interface configuration mode, and specify the Layer 3 in te rf ace o n
which you want to enable multicast routing.
The specified interface must be one of the following:
A routed port: a physical port that has been configured as a Layer 3
port by entering the no switchport interface configuration
command.
An SVI: a VLAN interface created by using the interface vlan
vlan-id global configuration command.
These ports must have IP addresses assigned to them. For more
information, see the Configuring Layer 3 Interfaces section on
page8-22.
Step4 ip pim version [1 | 2] Configure the PIM version on the interface.
By default, Version 2 is enabled and is the recommended setting.
Note All IP multicast-capable Cisco PIM routers using IOS Release
11.3(2)T or later start in PIMv2 by default.
An interface in PIMv2 mode automatically downgrades to PIMv1 mode
if that interface has a PIMv1 neighbor. The int erfac e ret urns 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 24-14.
Step5 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-modeEnables dense mode of operation.
sparse-modeEnables sparse mode of operation.
sparse-dense-modeCauses the interface to be treated in the mode
in which the group belongs. Sparse-dense-mode is the recommended
setting.
Note If you are use sparse-mode or sparse-dense mode, you must al so
configure an RP. For more information, see the Configuring a
Rendezvous Point section on page 24-17.
Step6 end Return to privileged EXEC mode.
Step7 show running-config Verify your entries.
Step8 copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose