UMN:CLI
User Manual
V8102
494
10.2.3.2
IGMP Snooping Last Member Query Interval
Upon receiving a leave message, a switch with IGMP snooping then sends out a group-
specific (IGMPv2) or group-source-specific query (IGMPv3) message to determine if
there is still any host interested in receiving the traffic. If there is no reply, the switch stops
forwarding the multicast traffic. However, IGMP messages may get lost for various rea-
sons, so you can specify an interval to send query messages.
To specify an interval to send group-specific or group-source-specific query messages,
use the following command.
Command
Mode
Description
ip igmp snooping last-member-
query-interval
<100-10000>
Global
Specifies a last member query interval.
100-10000: last member query interval
(default: 1000 milliseconds)
ip igmp snooping vlan
VLANS
last-member-query-interval
<100-10000>
Specifies a last member query interval.
VLANS: VLAN ID (1-4094)
To delete a specified an interval to send group-specific or group-source-specific query
messages, use the following command.
Command
Mode
Description
no ip igmp snooping last-
member-query-interval
Global
Deletes a specified last member query interval.
no ip igmp snooping vlan
VLANS
last-member-query-
interval
10.2.3.3
IGMP Snooping Immediate Leave
Normally, an IGMP snooping querier sends a group-specific or group-source-specific que-
ry message upon receipt of a leave message from a host. If you want to set a leave la-
tency as 0 (zero), you can omit the querying procedure. When the querying procedure is
omitted, the switch immediately removes the entry from the forwarding table for that
VLAN, and informs the multicast router.
To enable the IGMP snooping immediate leave, use the following command.
Command
Mode
Description
ip igmp snooping immediate-
leave
Global
Enables the IGMP snooping immediate leave globally.
ip igmp snooping port
PORTS
immediate-leave
Enables the IGMP snooping immediate leave on a port.
PORTS: port number (1/1, 1/2, 2/1, …)
ip igmp snooping vlan
VLANS
immediate-leave
Enables the IGMP snooping immediate leave on a
VLAN.
VLANS: VLAN ID (1-4094)
To disable the IGMP snooping immediate leave, use the following command.