Igmp Snooping Port Group Filtering - Interlogix NS4702-24P-4S-4X User Manual

Click "Save". The specific IGMP VLAN starts working after the corresponding static VLAN is also created.
: Click to apply changes
: Click to undo any changes made locally and revert to previously saved values.

4.8.6 IGMP Snooping Port Group Filtering

In certain switch applications, the administrator may want to control the multicast services that are available to end users. For
example, an IP/TV service based on a specific subscription plan. The IGMP filtering feature fulfills this requirement by restricting
access to specified multicast services on a switch port, and IGMP throttling limits the number of simultaneous multicast groups a
port can join.
IGMP filtering enables you to assign a profile to a switch port that specifies multicast groups that are permitted or denied on the port.
An IGMP filter profile can contain one or more, or a range of multicast addresses; but only one profile can be assigned to a port.
When enabled, IGMP join reports received on the port are checked against the filter profile. If a requested multicast group is
permitted, the IGMP join report is forwarded as normal. If a requested multicast group is denied, the IGMP join report is dropped.
IGMP throttling sets a maximum number of multicast groups that a port can join at the same time. When the maximum number of
groups is reached on a port, the switch can take one of two actions; either "deny" or "replace". If the action is set to deny, any new
IGMP join reports will be dropped. If the action is set to replace, the switch randomly removes an existing group and replaces it with
the new multicast group. The IGMP Snooping Port Group Filtering Configuration screen in
175
Figure 4-8-9 appears.