DGS-6604 ip igmp query-interval
CLI Reference Guide
269
ip igmp query-interval
Use this command to configure the interval at which the router sends IGMP
general-query messages periodically.
ip igmp query-interval SECONDS
Default 125 seconds
Command Mode VLAN interface configuration
Usage Guideline This command is for use on the VLAN interface only. Use this Interface
configuration command for modifying IGMP Group Member Query Interval on an
interface.
The IGMP querier sends IGMP membership query messages at the interval
specified by the ip igmp query-interval command to discover which multicast
groups have members on the attached networks of the router. Hosts respond
with IGMP report messages indicating that they want to receive multicast packets
for specific groups (that is, indicating that the host wants to become a member of
the group). IGMP query messages are addressed to the all-hosts multicast
group, which has the address 224.0.0.1, and has an IP time-to-live (TTL) value
of 1.
The igmp query-interval is also used for igmp snooping as IGMP is disabled but
igmp snooping is enabled at the interface.
Example This example shows how to configure the IGMP query interval to 300 seconds on
interface VLAN 1000.
Verify the settings by entering the show ip igmp interface command.
Syntax Description
SECONDS Configure the frequency at which the designated router sends IGMP general-
query messages.
By default, the designated router sends IGMP general-query messages every
125 seconds to keep the IGMP overhead very low on the hosts and networks.
The range is 1 to 31744.
Switch# configure terminal
Switch(config)# interface vlan1000
Switch(config-if)# ip igmp query-interval 300
Switch(config-if)# end
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