42-37
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-07
Chapter 42 Configuring IP Multicast Routing
Configuring Optional IGMP Features
• Changing the IGMP Version, page 42-39 (optional)
• Modifying the IGMP Host-Query Message Interval, page 42-40 (optional)
• Changing the IGMP Query Timeout for IGMPv2, page 42-41 (optional)
• Changing the Maximum Query Response Time for IGMPv2, page 42-41 (optional)
• Configuring the Switch as a Statically Connected Member, page 42-42 (optional)
Default IGMP Configuration
Table 42-5 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.
Ta b l e 42-5 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.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Specify the interface to be configured, and enter interface configuration
mode.
Step 3
no shutdown Enable the port, if necessary. By default, UNIs and ENIs are disabled, and
NNIs are enabled.
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