DETAILED STEPS
Purpose
Command or Action
Enables privileged EXEC mode.
enable
Step 1
Example:
Device>
enable
•
Enter your password if prompted.
Enters the global configuration mode.
configure terminal
Example:
Device#
configure terminal
Step 2
Specifies the Layer 3 interface on which you want to enable multicast routing,
and enters interface configuration mode.
interface interface-id
Example:
Device(config)#
interface
Step 3
The specified interface must be one of the following:
•
A routed port
—
A physical port that has been configured as a Layer 3
port by entering the
no switchport
interface configuration command.
gigabitethernet 1/0/1
You will also need to enable IP PIM sparse-dense-mode on the interface,
and join the interface as a statically connected member to an IGMP static
group. For a configuration example, see
Configuration as a Routed Port, on page 83
.
•
An SVI
—
A VLAN interface created by using the
interface vlan vlan-id
global configuration command. You will also need to enable IP PIM
sparse-dense-mode on the VLAN, join the VLAN as a statically
connected member to an IGMP static group, and then enable IGMP
snooping on the VLAN, the IGMP static group, and physical interface.
For a configuration example, see
Example: Interface Configuration as
an SVI, on page 83
.
These interfaces must have IP addresses assigned to them.
Configures the frequency at which the designated router sends IGMP
host-query messages.
ip igmp query-interval seconds
Example:
Device(config-if)#
ip igmp
Step 4
By default, the designated router sends IGMP host-query messages every 60
seconds to keep the IGMP overhead very low on hosts and networks.
query-interval 75
The range is 1 to 65535.
Returns to privileged EXEC mode.
end
Example:
Device(config-if)#
end
Step 5
IP Multicast Routing Configuration Guide, Cisco IOS XE Release 3SE (Catalyst 3650 Switches)
OL-29890-01
39
Configuring IGMP
Modifying the IGMP Host-Query Message Interval (CLI)
