C
HAPTER
37
| Multicast Filtering Commands
IGMP Snooping
– 851 –
DEFAULT SETTING
Disabled
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
proxy-reporting
This command enables IGMP Snooping with Proxy Reporting. Use the no
form to restore the default setting.
SYNTAX
[no] ip igmp snooping proxy-reporting
ip igmp snooping vlan vlan-id proxy-reporting {enable | disable}
no ip igmp snooping vlan vlan-id proxy-reporting
vlan-id - VLAN ID (Range: 1-4093)
enable - Enable on the specified VLAN.
disable - Disable on the specified VLAN.
DEFAULT SETTING
Global: Enabled
VLAN: Based on global setting
COMMAND MODE
Global Configuration
COMMAND USAGE
◆ When proxy reporting is enabled with this command, the switch
performs “IGMP Snooping with Proxy Reporting” (as defined in DSL
Forum TR-101, April 2006), including last leave, and query
suppression. Last leave sends out a proxy query when the last member
leaves a multicast group, and query suppression means that neither
specific queries nor general queries are forwarded from an upstream
multicast router to hosts downstream from this device.
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