Configure IGMP snooping TCN Event

Configuration Condition

Before configuring the IGMP snooping TCN event function, first complete the following task:

• Enable global and VLAN IGMP snooping function

Enable fast convergence

When the network topology changes, generate the TCN event and the spanning tree root port actively sends the global IMGP leave packets (group address: 0.0.0.0) to request the IGMP querier to send the general group query packet, making the fast convergence.

After enabling IGMP snooping TCN event fast convergence, non-spanning tree root port also actively sends the global IGMP leave packet (group address: 0.0.0.0), making the fast convergence.

Table 2-13 Enable fast convergence

Configure Query Interval of TCN Event

When the TCN event happens, IGMP snooping querier sends the general group query according to the TCN event query interval.

Table 2-14 Configure query interval of TCN event

Configure Query Times of TCN Event

When the TCN event happens, IGMP snooping querier sends the general group query according to the query interval of the TCN event. After the sending times reaches the configured query times of the TCN event, restore to the query interval of the general group.

Table 2-15 Configure query times of TCN event