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Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
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Chapter 44 Configuring IP Multicast Routing
Configuring Optional IGMP Features
•
Modifying the IGMP Host-Query Message Interval, page 44-33
(optional)
•
Changing the IGMP Query Timeout for IGMPv2, page 44-34
(optional)
•
Changing the Maximum Query Response Time for IGMPv2, page 44-35
(optional)
•
Configuring the Switch as a Statically Connected Member, page 44-35
(optional)
Default IGMP Configuration
Table 44-3
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 ICMP
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 44-3
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.
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
ip igmp join-group group-address
Configure the switch to join a multicast group.
By default, no group memberships are defined.
For group-address, specify the multicast IP address in dotted decimal
notation.