Overview
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6
IGMP Snooping
This section describes the Internet Group Management Protocol (IGMP) feature: IGMPv3 and
IGMP Snooping. The IGMP Snooping feature enables the switch to monitor IGMP
transactions between hosts and routers. It can help conserve bandwidth by allowing the switch
to forward IP multicast traffic only to connected hosts that request multicast traffic.
Overview
IGMP:
•
Uses Version 3 of IGMP
•
Includes snooping
•
Snooping can be enabled per VLAN
CLI Examples
The following are examples of the commands used in the IGMP Snooping feature.
Example #1: show igmpsnooping
(DWS-3024)
#show igmpsnooping ?
<cr>
Press Enter to execute the command.
<slot/port>
Enter interface in slot/port format.
mrouter
Display IGMP Snooping Multicast Router information.
<1-3965>
Display IGMP Snooping valid VLAN ID information.
(DWS-3024) #show
igmpsnooping
Admin Mode...............................Enable
Multicast Control Frame Count............0
Interfaces Enabled for IGMP Snooping.....0/10
Vlans enabled for IGMP snooping..........20
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