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20-23
Catalyst 2960 Switch Software Configuration Guide
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Chapter 20 Configuring IGMP Snooping and MVR
Configuring IGMP Filtering and Throttling
Default IGMP Filtering and Throttling Configuration
Table 20-7 shows the default IGMP filtering configuration.
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 “Configuring the IGMP Throttling Action”
section on page 20-25.
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:
• deny: Specifies that matching addresses are denied; this is the default.
• exit: Exits from igmp-profile configuration mode.
• no: Negates a command or returns to its defaults.
• permit: Specifies that matching addresses are permitted.
• range: Specifies a range of IP addresses for the profile. You can enter a single IP address or a range
with a start and an end address.
The default is for the switch to have no IGMP profiles configured. When a profile is configured, if
neither the permit nor deny keyword is included, the default is to deny access to the range of IP
addresses.
Beginning in privileged EXEC mode, follow these steps to create an IGMP profile:
Table 20-7 Default IGMP Filtering Configuration
Feature Default Setting
IGMP filters None applied
IGMP maximum number of IGMP groups No maximum set
IGMP profiles None defined
IGMP profile action Deny the range addresses
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
ip igmp profile profile number Assign a number to the profile you are configuring, and enter IGMP
profile configuration mode. The profile umber range is 1 to 4294967295.
Step 3
permit | deny (Optional) Set the action to permit or deny access to the IP multicast
address. If no action is configured, the default for the profile is to deny
access.