Brocade 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) - Manual (Page 1165)

Brocade 6910 Ethernet Access Switch Configuration Guide 1109
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Filtering and Throttling IGMP Groups
To display IGMP snooping protocol-related statistics for a port:
1. Click Multicast, IGMP Snooping, Statistics.
2. Select Show Port Statistics from the Action list.
3. Select a Port.
FIGURE 382 Displaying IGMP Snooping Statistics – Port
Filtering and Throttling IGMP Groups
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 dropped. If
the action is set to replace, the switch randomly removes an existing group and replaces it with the
new multicast group.