Table of Contents
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Chapter 21
Configuring IGMP Snooping
Table 21-5
Feature
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 21-19.
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:
•
•
•
•
•
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:
Command
Step 1
configure terminal
Step 2
ip igmp profile profile number
Step 3
permit | deny
Step 4
range ip multicast address
Step 5
end
Step 6
show ip igmp profile profile number
Step 7
copy running-config startup-config
OL-23389-01
Default IGMP Filtering Configuration
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.
Default Setting
None defined
Deny the range addresses
Purpose
Enter global configuration mode.
Assign a number to the profile you are configuring, and enter IGMP
profile configuration mode. The profile umber range is 1 to 4294967295.
(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.
Enter the IP multicast address or range of IP multicast addresses to
which access is being controlled. If entering a range, enter the low IP
multicast address, a space, and the high IP multicast address.
You can use the range command multiple times to enter multiple
addresses or ranges of addresses.
Return to privileged EXEC mode.
Verify the profile configuration.
(Optional) Save your entries in the configuration file.
Catalyst 2928 Switch Software Configuration Guide
Configuring IGMP Filtering and Throttling
"Configuring the IGMP Throttling Action"
21-17
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Troubleshooting
