Cisco Catalyst 2960 Command Reference Manual page 146
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Also See for Catalyst 2960:
- Configuration manual (2288 pages) ,
- Software configuration manual (980 pages) ,
- Command reference manual (800 pages)
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ip igmp snooping querier
Usage Guidelines
Use this command to enable IGMP snooping to detect the IGMP version and IP address of a device that
sends IGMP query messages, which is also called a querier.
By default, the IGMP snooping querier is configured to detect devices that use IGMP Version 2
(IGMPv2) but does not detect clients that are using IGMP Version 1 (IGMPv1). You can manually
configure the max-response-time value when devices use IGMPv2. You cannot configure the
max-response-time when devices use IGMPv1. (The value cannot be configured and is set to zero).
Non-RFC compliant devices running IGMPv1 might reject IGMP general query messages that have a
non-zero value as the max-response-time value. If you want the devices to accept the IGMP general query
messages, configure the IGMP snooping querier to run IGMPv1.
VLAN IDs 1002 to 1005 are reserved for Token Ring and FDDI VLANs and cannot be used in IGMP
snooping.
Examples
This example shows how to globally enable the IGMP snooping querier feature:
Switch(config)# ip igmp snooping querier
This example shows how to set the IGMP snooping querier maximum response time to 25 seconds:
Switch(config)# ip igmp snooping querier max-response-time 25
This example shows how to set the IGMP snooping querier interval time to 60 seconds:
Switch(config)# ip igmp snooping querier query-interval 60
This example shows how to set the IGMP snooping querier TCN query count to 25:
Switch(config)# ip igmp snooping querier tcn count 25
This example shows how to set the IGMP snooping querier timeout to 60 seconds:
Switch(config)# ip igmp snooping querier timeout expiry 60
This example shows how to set the IGMP snooping querier feature to version 2:
Switch(config)# ip igmp snooping querier version 2
You can verify your settings by entering the show ip igmp snooping privileged EXEC command.
Related Commands
Command
ip igmp snooping report-suppression
show ip igmp snooping
show ip igmp snooping groups
show ip igmp snooping mrouter
Catalyst 2960 Switch Command Reference
2-118
Chapter 2
Catalyst 2960 Switch Cisco IOS Commands
Description
Enables IGMP report suppression.
Displays the IGMP snooping configuration.
Displays IGMP snooping multicast information.
Displays the IGMP snooping router ports.
78-16882-01
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