Cisco Systems ME3400G2CSA Controlling Access to IP Multicast Groups

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Cisco ME 3400 EthernetAccess Switch SoftwareConfiguration Guide
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Chapter34 Configuring IP Multicast Routing
Configuring Optional IGMP Features
Beginning in privileged EXEC mode, follow these steps to configure the switch to be a member of a
group. This procedure is optional.
To cancel membership in a group, use the no ip igmp join-gro up group-address interface configuration
command.
This example shows how to enable the switch to join multicast group 25 5.2 .2 .2:
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# ip igmp join-group 255.2.2.2
Controlling Access to IP Multicast Groups
The switch sends IGMP host-query messages to find which multicast groups have members on attached
local networks. The switch then forwards to these group members all packets addressed to the mul tica st
group. You can place a filter on each interface to restrict the multicast groups that hosts on the subnet
serviced by the interface can join.
Beginning in privileged EXEC mode, follow these steps to filter multicast groups allowed on an
interface. This procedure is optional.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Specify the interface to be configured, and enter interface configuration
mode.
Step3 no shutdown Enable the port, if necessary. By default, UNIs are dis ab led, and NNIs are
enabled.
Step4 ip igmp join-group group-address Configure the switch to join a multicast group.
By default, no group memberships are defined.
For group-address, specify the multicast IP address in dotted decimal
notation.
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
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Specify the interface to be configured, and enter interface
configuration mode.
Step3 no shutdown Enable the port, if necessary. By default, UNIs are disabled, and NNIs
are enabled.
Step4 ip igmp access-group access-list-number Specify the multicast groups that hosts on the subnet serviced by an
interface can join.
By default, all groups are allowed on an interface.
For access-list-number, specify an IP standard access list number.
The range is 1 to 99.