Supported Platforms
Related Documentation
immediate-leave (MLD Snooping)
Syntax
Hierarchy Level
Release Information
Statement introduced in Junos OS Release 12.1 for EX Series switches.
Description
Configure MLD snooping immediate leave for the specified VLAN. When you configure immediate leave, host tracking is enabled, which allows the switch to track the hosts that send join messages. The switch can then determine when the last host on an interface leaves the multicast group and immediately stop forwarding multicast traffic to the interface.
Configuring immediate leave reduces the amount of time it takes for the switch to stop sending multicast traffic to an interface when the last host leaves the group. When immediate leave is disabled, the switch no longer tracks hosts. Instead, whenever it receives a leave message from a host, it sends out a group membership query to all hosts. If it does not receive any join group reports on the interface in response to the group membership query within a set interval, it then stops forwarding multicast traffic to the interface.
 | Note: Immediate leave is supported for both MLD version 1 (MLDv1) and MLDv2. However, with MLDv1, we recommend that you configure immediate leave only when there is only one MLD host on an interface. In MLDv1, only one host on a interface sends a join report in response to a group membership query—any other interested hosts suppress their reports. This report-suppression feature means that the switch only knows about one interested host on the interface at any given time. |
Default
The immediate-leave feature is disabled.
Required Privilege Level
routing—To view this statement in the
configuration.
routing-control—To add this statement
to the configuration.
