Filtering And Throttling Igmp Groups - Edge-Core ECS4810-12M Layer 2 Management Manual

| Multicast Filtering
C 18
HAPTER

Filtering and Throttling IGMP Groups

F T
ILTERING AND HROTTLING
To display IGMP snooping protocol-related statistics for a port:
Click Multicast, IGMP Snooping, Statistics.
1.
Select Show Port Statistics from the Action list.
2.
Select a Port.
3.
Figure 331: Displaying IGMP Snooping Statistics – Port
IGMP G
ROUPS
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 addresses, 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
– 550 –