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Cisco Catalyst Blade Switch 3130 for Dell Software Configuration Guide
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Chapter44 Configuring IP Multicast Routing
Configuring Optional Multicast Routing Features
Beginning in privileged EXEC mode, follow these steps to configure the switch itself to be a statically
connected member of a group (and enable fast switching). This procedure is optional.
To remove the switch as a member of the group, use the no ip igmp static-group group-address interface
configuration command.
Configuring Optional Multicast Routing Features
These sections describe how to configure optional multicast routing features:
•Features for Layer 2 connectivity and MBONE multimedia conference session and set up:
–
Enabling CGMP Server Support, page 44-36 (optional)
–
Configuring sdr Listener Support, page 44-37 (optional)
•Features that control bandwidth utilization:
–
Configuring an IP Multicast Boundary, page44-39 (optional)
•Procedure for configuring a multicast within a VPN routing/forwarding(VRF) table:
–
Configuring Multicast VRFs, page38-74 (optional )

Enabling CGMP Server Support

The switch serves as a CGMP server for devices that do not support IGMP snooping but have CGMP
client functionality. CGMP is a protocol used on Cisco routers and mul tilaye r switc hes con ne cte d to
Layer 2 Catalyst switches to perform tasks similar to those performed by IGMP. CGMP is necessary
because the Layer 2 switch cannot distinguish between IP multicast data packets and IGMP report
messages, which are both at the MAC-level and are addressed to the same group address.
Beginning in privileged EXEC mode, follow these steps to enable the CGMP server on the switch
interface. This procedure is optional.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Specify the interface to be configur ed, and e nter inte rface c onfigu ration
mode.
Step3 ip igmp static-group group-address Configure the switch as a statically connected member of a group.
By default, this feature is disabled.
Step4 end Return to privileged EXEC mode.
Step5 show ip igmp interface [interface-id] Verify your entries.
Step6 copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Specify the interface that is connected to the Layer 2 Catalyst switch , and
enter interface configuration mode.