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Transition Networks
S4224 Web User Guide
33558 Rev. C
Page 179 of 669
IGMP Snooping
The IGMP Snooping menu provides for Basic Configuration, VLAN Configuration, and Port Group
Filtering configuration from the sub-menus.
IGMP snooping allows the S4224 dynamically determine which hosts connected to a particular VLAN in
the switch need to receive a particular multicast transmission. The S4224 basically listens (snoops) to the
various IGMP messages (e.g., ‘Query’ or ‘Leave’) and other multicast protocol transmissions. It then
dynamically determines which egress ports are associated with each multicast transmission. The S4224
uses a bridge table entry to control multicast forwarding (note that the entry is dynamically configured).
The S4224 performs these actions based on IGMP messages snooped: add a receiver to a group,
remove a receiver from a group, or maintain group membership.
Basic Configuration
From the
Configuration
>
IPMC
>
IGMP Snooping
>
Basic Configuration
menu path you can view and
edit the IGMP Snooping global and port-related configurations.
This page provides IGMP Global and Port Related configuration.
Snooping Enabled
Check to enable Global IGMP Snooping. The default is unchecked (disabled).
Unregistered IPMCv4 Flooding Enabled
Check to enable unregistered IPMC traffic flooding. The default is enabled (checkbox checked).
IPMC IP MultiCast (IPMC) supports IPv4 and IPv6 multicasting. IPMCv4 denotes multicast for IPv4.
IPMCv6 denotes multicast for IPv6.
IGMP SSM Range
SSM (Source-Specific Multicast) Range allows the SSM-aware hosts and routers run the SSM
service model for the groups in the address range. SSM is a method of delivering multicast packets in
which the only packets delivered to a receiver are those originating from a specific source address