33-36
Cisco ME 3800X and 3600X Switch Software Configuration Guide
OL-23400-01
Chapter 33 Configuring IP Multicast Routing
Configuring Optional IGMP Features
To return to the default setting, use the no ip pim query-interval [seconds] interface configuration
command.
Configuring Optional IGMP Features
• Default IGMP Configuration, page 33-36
• Configuring the Switch as a Member of a Group, page 33-36 (optional)
• Controlling Access to IP Multicast Groups, page 33-37 (optional)
• Changing the IGMP Version, page 33-38 (optional)
• Modifying the IGMP Host-Query Message Interval, page 33-39 (optional)
• Changing the IGMP Query Timeout for IGMPv2, page 33-39 (optional)
• Changing the Maximum Query Response Time for IGMPv2, page 33-40 (optional)
• Configuring the Switch as a Statically Connected Member, page 33-41 (optional)
Default IGMP Configuration
Table 33-5 shows the default IGMP configuration.
Configuring the Switch as a Member of a Group
You can configure the switch as a member of a multicast group and discover multicast reachability in a
network. If all the multicast-capable routers and multilayer switches that you administer are members of
a multicast group, pinging that group causes all these devices to respond. The devices respond to IGMP
echo-request packets addressed to a group of which they are members. Another example is the multicast
trace-route tools provided in the software.
Caution Performing this procedure might impact the CPU performance because the CPU will receive all data
traffic for the group address.
Beginning in privileged EXEC mode, follow these steps to configure the switch to be a member of a
group. This procedure is optional.
Table 33-5 Default IGMP Configuration
Feature Default Setting
Multilayer switch as a member of a multicast group No group memberships are defined.
Access to multicast groups All groups are allowed on an interface.
IGMP version Version 2 on all interfaces.
IGMP host-query message interval 60 seconds 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 statically connected member Disabled.
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