Multicast Filtering

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CLI – This example configures profile number 19 by setting the access mode to
“permit” and then specifying a range of multicast groups that a user can join. The
current profile configuration is then displayed.

Configuring IGMP Filtering and Throttling for Interfaces

Once you have configured IGMP profiles, you can then assign them to interfaces on
the switch. Also, you can set the IGMP throttling number to limit the number of
multicast groups an interface can join at the same time.
Command Usage
• Only one profile can be assigned to an interface.
• An IGMP profile or throttling setting can be applied to a trunk interface. When ports
are configured as trunk members, the trunk uses the settings applied to the first
port member in the trunk.
• 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.
Command Attributes
•Profile – Selects an existing profile number to assign to an interface.
•Max Multicast Groups – Sets the maximum number of multicast groups an
interface can join at the same time. (Range: 0-256; Default: 256)
•Current Multicast Groups – Displays the current number of multicast groups the
interface has joined.
•Throttling Action Mode – Sets the action to take when the maximum number of
multicast groups for the interface has been exceeded. (Default: Deny)
•deny - The new multicast group join report is dropped.
•replace - The new multicast group replaces an existing group.
•Throttling Status – Indicates if the throttling action has been implemented on the
interface. (Options: True or False)
•Trunk – Indicates if a port is a trunk member.
Console(config)#ip igmp profile 19 4-278
Console(config-igmp-profile)#permit 4-278
Console(config-igmp-profile)#range 239.1.1.1 4-279
Console(config-igmp-profile)#range 239.2.3.1 239.2.3.100
Console(config-igmp-profile)#end
Console#show ip igmp profile 19 4-282
IGMP Profile 19
permit
range 239.1.1.1 239.1.1.1
range 239.2.3.1 239.2.3.100
Console#