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Cisco ME 3400 EthernetAccess Switch SoftwareConfiguration Guide
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Chapter34 Configuring IP Multicast Routing
Configuring Optional IGMP Features
To return to the default setting, use the no ip igmp query-max-response-time interface configuration
command.
Configuring the Switch as a Statically Connected Member
Sometimes there is either no group member on a network segment or a h ost ca nno t re port it s g rou p
membership by using IGMP. However, you might want multicast traffic to go to that network segment.
These are ways to pull multicast traffic down to a network segment:
•Use the ip igmp join-group interface configuration command. With this method, the switch acc epts
the multicast packets in addition to forwarding them. Accepting the multicast packets prevents the
switch from fast switching.
•Use the ip igmp static-group interface configuration command. With this method, the switch does
not accept the packets itself, but only forwards them. This method enables fast switching. The
outgoing interface appears in the IGMP cache, but the switch itself is not a member, as evidenced
by lack of an L (local) flag in the multicast route entry.
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.
Step5 end Return to privileged EXEC mode.
Step6 show ip igmp interface [interface-id] Verify your entries.
Step7 copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
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 no shutdown Enable the port, if necessary. By default, UNIs are disabled, and NNIs
are enabled.
Step4 ip igmp static-group group-address Configure the switch as a statically connected member of a group.
By default, this feature is disabled.
Step5 end Return to privileged EXEC mode.
Step6 show ip igmp interface [interface-id] Verify your entries.
Step7 copy running-config startup-config (Optional) Save your entries in the configuration file.