7.6.2 Link aggregation forwarding

If the link aggregation that connects to multiple member switches is the forwarding destination, the port of the received member switch is given priority for forwarding. The stack link bandwidth can be effectively utilized by assigning a priority to the port of the member switch that received the frame. In addition, if other member switches in the stack fail, they will not be affected by communications. For effective use of priority distribution, it is recommended that you configure multiple member switches when using link aggregation on the stack.

<Structure of this section>

(1) Transfer operation during normal operation

If the link aggregation that connects to multiple member switches is the forwarding destination, the port of the received member switch is given priority for forwarding. The following figure shows the normal transfer operation.

Figure 7-12: Transfer operation during normal operation (link aggregation)

(2) Transfer operation at the time of port failure at the transfer source

If a member switch that is received due to a fault in the source port during link aggregation is changed, the port on the received member switch is prioritized for forwarding. The following figure shows the transfer operation in the event of a port failure at the transfer source in link aggregation.

Figure 7-13: Transfer operation when a transfer source port fails (link aggregation)

(3) Forwarding Operation in Case of Port Failure at Forwarding Destination

If link aggregation fails on the destination port and no port is forwarded to the received member switch, the port is forwarded through the stack link to the port of the other member switch. The following figure shows the transfer operation in the event of a transfer destination port failure during link aggregation.

Figure 7-14: Transfer operation when a transfer destination port fails (link aggregation)