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Chapter 26  IGMP Commands 
IGMP Snooping (Internet Group Management Protocol Snooping) is a multicast control 
mechanism running on Layer 2 switch. It can effectively prevent multicast groups being 
broadcasted in the network. 
igmp-snooping global 
Description 
The igmp-snooping global command is used to configure IGMP globally. To 
return to the default configuration, please use no igmp-snooping global 
command. 
Syntax 
igmp-snooping global [status { disable | enable }] [unknown-packet { pass | 
discard }] 
no igmp-snooping global 
Parameter 
status  ——  Enable/ Disable IGMP Snooping function globally on the switch. By 
default, it is disabled. 
unknown-packet  —— The operation for the switch to process unknown 
multicast, with pass and discard options. 
Command Mode 
Global Configuration Mode 
Example 
Enable IGMP Snooping function, and specify the operation to process unknown 
multicast as discard: 
TP-LINK(config)# igmp-snooping global status enable unknown-packet 
discard 
igmp-snooping config 
Description 
The  igmp-snooping config status command is used to configure IGMP 
Snooping and Fast Leave function for port. To return to the default configuration, 
please use no igmp-snooping config command.