Default Igmp Filtering And Throttling Configuration; Configuring Igmp Profiles - Cisco 2950 - Catalyst Switch Configuration Manual

Configuring IGMP Filtering and Throttling
Note IGMPv3 join and leave messages are not supported on switches running IGMP filtering.
You can also set the maximum number of IGMP groups that a Layer 2 interface can join.
With the IGMP throttling feature, you can also set the maximum number of IGMP groups that a Layer 2
interface can join. If the maximum number of IGMP groups is set, the IGMP snooping forwarding table
contains the maximum number of entries, and the interface receives an IGMP join report, you can
configure an interface to drop the IGMP report or to remove a randomly selected multicast entry in the
forwarding table and then to add the IGMP group in the report to the table.
These sections describe how to configure IGMP filtering and throttling:
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Default IGMP Filtering and Throttling Configuration

Table 21-7
Table 21-7 Default IGMP Filtering Configuration
Feature
IGMP filters
IGMP Maximum number of IGMP groups
IGMP profiles
IGMP profile action
When the maximum number of groups is in forwarding table, the default IGMP throttling action is to
deny the IGMP report. For configuration guidelines, see the
section on page 21-25.

Configuring IGMP Profiles

To configure an IGMP profile, use the ip igmp profile global configuration command with a profile
number to create an IGMP profile and to enter IGMP profile configuration mode. From this mode, you
can specify the parameters of the IGMP profile to be used for filtering IGMP join requests from a port.
When you are in IGMP profile configuration mode, you can create the profile by using these commands:
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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
21-22
Default IGMP Filtering and Throttling Configuration, page 21-22
Configuring IGMP Profiles, page 21-22
Applying IGMP Profiles, page 21-24
Setting the Maximum Number of IGMP Groups, page 21-25
Configuring the IGMP Throttling Action, page 21-25
shows the default IGMP filtering configuration.
deny: Specifies that matching addresses are denied; this is the default condition.
exit: Exits from igmp-profile configuration mode.
no: Negates a command or sets its defaults.
Chapter 21
(optional)
(optional)
(optional)
(optional)
Default Setting
None applied
No maximum set
None defined
Deny the range addresses
"Configuring the IGMP Throttling Action"
Configuring IGMP Snooping and MVR
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