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Cisco ME 3400 EthernetAccess Switch SoftwareConfiguration Guide
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Chapter34 Configuring IP Multicast Routi ng Configuring Optional IGMP Features
Configuring Optional IGMP Features
These sections contain this configuration information:
•Default IGMP Configuration, page 34-25
•Configuring the Switch as a Member of a Group, page 34-25 (optional)
•Controlling Access to IP Multicast Groups, page 34-26 (optional)
•Changing the IGMP Version, page 34-27 (optional)
•Modifying the IGMP Host-Query Message Interval, page 34-28 (optional)
•Changing the IGMP Query Timeout for IGMPv2, page 34-29 (optional)
•Changing the Maximum Query Response Time for IGMPv2, page 34-29 (opt ional)
•Configuring the Switch as a Statically Connected Member, page 34-30 (optional)

Default IGMP Configuration

Table34-3 shows the de fault I GMP configur ation.

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 s witches that you ad mini ster are me mbers 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.
Table34-3 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.