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Configuring IGMP Snooping and MVR
How to Configure IGMP Snooping and MVR
Configuring TCN
Configuring the IGMP Snooping Querier
6. ip igmp snooping
last-member-query-interval time
(Optional) Configures the IGMP leave timer globally. The range is 100
to 32768 milliseconds. The default is 1000 seconds.
7. ip igmp snooping vlan vlan-id
last-member-query-interval time
(Optional) Configures the IGMP leave time on the VLAN interface. The
range is 100 to 32768 milliseconds.
Note: Configuring the leave time on a VLAN overrides the globally
configured timer.
8. end Returns to privileged EXEC mode.
Command Purpose
Command Purpose
1. configure terminal Enters global configuration mode.
2. ip igmp snooping tcn flood query count
count
Specifies the number of IGMP general queries for which the multicast
traffic is flooded. The range is 1 to 10. By default, the flooding query
count is 2.
3. ip igmp snooping tcn query solicit Sends an IGMP leave message (global leave) to speed the process
of recovering from the flood mode caused during a TCN event. By
default, query solicitation is disabled.
Note: Enable the switch to send the global leave message whether
or not it is the spanning-tree root.
4. interface interface-id Specifies the interface to be configured, and enter interface
configuration mode.
5. no ip igmp snooping tcn flood Disables the flooding of multicast traffic during a spanning-tree TCN
event.
By default, multicast flooding is enabled on an interface.
6. end Returns to privileged EXEC mode.
Command Purpose
1. configure terminal Enters global configuration mode.
2. ip igmp snooping querier Enables the IGMP snooping querier.
3. ip igmp snooping querier address
ip_address
(Optional) Specifies an IP address for the IGMP snooping querier. If
you do not specify an IP address, the querier tries to use the global
IP address configured for the IGMP querier.
Note: The IGMP snooping querier does not generate an IGMP
general query if it cannot find an IP address on the switch.
4. ip igmp snooping querier query-interval
interval-count
(Optional) Sets the interval between IGMP queriers. The range is 1 to
18000 seconds.
5. ip igmp snooping querier tcn query [count
count | interval interval]
(Optional) Sets the time between Topology Change Notification
(TCN) queries. The count range is 1 to 10. The interval range is 1 to
255 seconds.
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