C
HAPTER
38
| Multicast Filtering Commands
IGMP Snooping
– 897 –
ip igmp snooping This command enables IGMP snooping globally on the switch or on a
selected VLAN interface. Use the no form to disable it.
SYNTAX
[no] ip igmp snooping [vlan vlan-id]
vlan-id - VLAN ID (Range: 1-4093)
DEFAULT SETTING
Enabled
COMMAND MODE
Global Configuration
COMMAND USAGE
◆ When IGMP snooping is enabled globally, the per VLAN interface
settings for IGMP snooping take precedence.
◆ When IGMP snooping is disabled globally, snooping can still be
configured per VLAN interface, but the interface settings will not take
effect until snooping is re-enabled globally.
EXAMPLE
The following example enables IGMP snooping globally.
Console(config)#ip igmp snooping
Console(config)#
ip igmp snooping
priority
This command assigns a priority to all multicast traffic. Use the no form to
restore the default setting.
SYNTAX
ip igmp snooping priority priority
no ip igmp snooping priority
priority - The CoS priority assigned to all multicast traffic.
(Range: 0-6, where 6 is the highest priority)
DEFAULT SETTING
2
COMMAND MODE
Global Configuration
COMMAND USAGE
This command can be used to set a high priority for low-latency multicast
traffic such as a video-conference, or to set a low priority for normal
multicast traffic not sensitive to latency.