3Com Switch 8800 Configuration Guide
Chapter 27 IGMP Configuration
27-3
27.2.1 Enabling Multicast
Only if the multicast function is enabled can the multicast-related configurations take
effect.
Refer to Chapter 26 Common Multicast Configuration.
27.2.2 Enabling IGMP on an Interface
This configuration task is to enable IGMP on the interface which needs to maintain the
multicast membership. After this, you can initiate IGMP feature configuration.
Perform the following configuration in VLAN interface view.
Table 27-1
Enabling/Disabling IGMP on an interface
Operation
Command
Enable IGMP on an interface
igmp enable
Disable IGMP on an interface
undo igmp enable
By default, IGMP is not enabled.
27.2.3 Configuring the IGMP Version
Perform the following configuration in VLAN interface view.
Table 27-2
Configuring the IGMP version
Operation
Command
Select the IGMP version that the router uses
igmp version
{
2
|
1
}
Restore the default setting
undo igmp version
By default, IGMP Version 2 is used.
Caution:
All routers on a subnet must support the same version of IGMP. After detecting the
presence of IGMP Version 1 system, a router cannot automatically switch to Version 1.
