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Cisco ME 3400 EthernetAccess Switch SoftwareConfiguration Guide
78-17058-01
Chapter34 Configuring IP Multicast Routi ng 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 no t aut omati call y detec t
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.
Step5 exit Return to global configuration mode.
Step6 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.
Step7 end Return to privileged EXEC mode.
Step8 show ip igmp interface [interface-id] Verify your entries.
Step9 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 configured, and enter interface
configuration mode.
Step3 no shutdown Enable the port, if necessary. By default, UNIs are disabl ed , and NNIs
are enabled.