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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-06
Chapter 40 Configuring IP Multicast Routing Configuring Optional IGMP Features
To disable groups on an interface, use the no ip igmp access-group interface configuration command.
This example shows how to configure hosts attached to a port as able to join only group 255.2.2.2:
Switch(config)# access-list 1 255.2.2.2 0.0.0.0
Switch(config-if)# interface gigabitethernet0/1
Switch(config-if)# ip igmp access-group 1
Changing the IGMP Version
By default, the switch uses IGMP Version 2, which provides features such as the IGMP query timeout
and the maximum query response time.
All systems on the subnet must support the same version. The switch does not automatically detect
Version 1 systems and switch to Version 1. You can mix Version 1 and Version 2 hosts on the subnet
because Version 2 routers or switches always work correctly with IGMPv1 hosts.
Configure the switch for Version 1 if your hosts do not support Version 2.
Beginning in privileged EXEC mode, follow these steps to change the IGMP version. This procedure is
optional.
Step 6 access-list access-list-number {deny |
permit} source [source-wildcard]Create a standard access list.
• For access-list-number, specify the access list created in Step 3.
• The deny keyword denies access if the conditions are matched.
The permit keyword permits access if the conditions are
matched.
• For source, specify the multicast group that hosts on the subnet
can join.
• (Optional) For source-wildcard, enter the wildcard bits in dotted
decimal notation to be applied to the source. Place ones in the bit
positions that you want to ignore.
Recall that the access list is always terminated by an implicit deny
statement for everything.
Step 7 end Return to privileged EXEC mode.
Step 8 show ip igmp interface [interface-id]Verify your entries.
Step 9 copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Command Purpose
Step 1 configure terminal Enter global configuration mode.
Step 2 interface interface-id Specify the interface to be configured, and enter interface
configuration mode.
Step 3 no shutdown Enable the port, if necessary. By default, UNIs and ENIs are disabled,
and NNIs are enabled.