ipv6 mld fastlearn

The Fast Learn option allows fast convergence of multicast traffic after a topology change. When a new port joins or moves to a forwarding state, MLD sends joins for the groups it maintains.

For MLDv1, a join is transmitted for each group if the switch is a nonquerier. If the switch is a querier, an MLDv1 query is sent to learn the group on that port.

For MLDv2, an IS_EX report is sent when the switch is a nonquerier. If the switch is a querier, an MLDv2 query is sent on the port to learn the group.

Syntax

ipv6 mld fastlearn <port-list|all>

no ipv6 mld fastlearn <port-list|all>

Description

This command enables fast learn on the specified ports in a VLAN. The no form of the command disables the fast learn function on the specified ports. The all option enabled or disables all ports.

Specifiers

Default: Disabled

Example input

switch(config)# ipv6 mld fastlearn 5 - 6