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Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter 24 Configuring IP Multicast Routing
Configuring Optional IGMP Features
By default, multicast routers and multilayer switches send PIM router-query messages every 30 seconds.
Beginning in privileged EXEC mode, follow these steps to modify the router-query message interval:
To return to the default interval, use the no ip pim query-interval [seconds] interface configuration
command.
Configuring Optional IGMP Features
This section describes how to configure optional IGMP features. It contains this configuration
information:
• Default IGMP Configuration, page 24-31
• Changing the IGMP Version, page 24-32
• Changing the IGMP Query Timeout for IGMPv2, page 24-32
• Changing the Maximum Query Response Time for IGMPv2, page 24-33
• Configuring the Multilayer Switch as a Member of a Group, page 24-34
• Controlling Access to IP Multicast Groups, page 24-35
• Modifying the IGMP Host-Query Message Interval, page 24-36
• Configuring the Multilayer Switch as a Statically Connected Member, page 24-36
Default IGMP Configuration
Table 24-2 shows the default IGMP configuration.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Enter interface configuration mode, and specify the interface to be
configured.
Step 3
ip pim query-interval seconds Configure the frequency at which the multilayer switch sends PIM
router-query messages.
The default is 30 seconds. The range is 1 to 65535.
Step 4
end Return to privileged EXEC mode.
Step 5
show ip igmp interface [interface-id] Verify your entries.
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.
Table 24-2 Default IGMP Configuration
Feature Default Setting
IGMP version Version 2 on all interfaces.
IGMP query timeout 60 seconds on all interfaces.
IGMP maximum query response time 10 seconds on all interfaces.
Multilayer switch as a member of a multicast group No group memberships are defined.
