ipv6 mld snooping forced fastleave

Syntax

ipv6 mld snooping forced fastleave <port-list>

Description

Configures the given ports in forced fastleave mode.

The no form of this command disables forced fastleave configuration on the ports.

Command context

config-vlan

Parameters

fastleave <PORT-LIST>

Specifies a list of one or more ports to be configured as forced fastleave ports. You can specify a single port, a comma-separated list of ports or a range of ports such as 1/1/1-1/1/3.

Authority

Administrators or local user group members with execution rights for this command.

Usage

With forced fastleave enabled, MLD speeds up the process of blocking unnecessary multicast traffic to a switch port that is connected to multiple end nodes. When a port having multiple end nodes receives a leave group request from one end node for a given multicast group, forced fastleave activates and waits a small amount of time to receive a join request from any other member of the same group on that port. If the port does not receive a join request for that group within the forced fastleave interval, the switch then blocks any further traffic to that group on that port.

Example

Configure forced-fastleave ports for the VLAN:

switch(config)# vlan 2
switch(config-vlan)# ipv6 mld snooping forced-fastleave 1/1/1
switch(config-vlan)# ipv6 mld snooping forced-fastleave 1/1/1-1/1/2
switch(config-vlan)# ipv6 mld snooping forced-fastleave 1/1/1,1/1/2-1/1/3
switch(config-vlan)# no ipv6 mld snooping forced-fastleave 1/1/1
switch(config-vlan)# no ipv6 mld snooping forced-fastleave 1/1/1-1/1/2