iES20G/iES18G
Series User’s Manual
iS5 Communications Inc.
59
5.1.11
Multicast
5.1.11.1
IGMP Snooping
The Internet Group Management Protocol (IGMP) is used by IP hosts to register the dynamic
multicast group membership. IGMP has 3 versions: IGMP v1, v2 and v3. Please refer to
RFC 1112, 2236 and 3376. IGMP snooping monitors the Internet Group Management
Protocol (IGMP) traffic between hosts and multicast routers. This conserves bandwidth by
allowing the switch to send multicast traffic to only those interfaces that are connected to
hosts that want to receive the traffic, instead of flooding the traffic to all interfaces in the
VLAN.
IGMP Snooping interface
The following table describes the labels for IGMP Snooping screen.
Label
Description
IGMP Snooping
Enable/Disable IGMP snooping. When enabling IGMP Snooping the
version must be selected.
IGMP Query Mode
Defines if the switch will be in IGMP query mode or not. There should
only be one switch in IGMP query mode for any IGMP application.
The "Auto" mode means that the switch in IGMP query mode is the
one with the lowest IP address.
IGMP Snooping Table
Shows the current IP multicast list.
Apply
Click “
Apply
” to activate the configurations.
Help
Show help file.