23.1.6 Notes on using link aggregation

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(1) Configuration in which link aggregation is not possible

To use link aggregation, the settings of the connected devices must match. The following figure shows configurations in which link aggregation is not possible.

Figure 23-2: Example configuration where link aggregation is not possible

(2) Link Aggregation Setting Procedure

To use link aggregation, the settings of the connected devices must match. If the settings of connected devices do not match, a communication loop might occur. It is recommended that you link up the port after confirming that the configuration is in the link-down state and that the configuration is not as shown in (1) Configuration in which link aggregation is not possible.

(3) CPU overload

If CPU load is excessive when LACP link aggregation mode is used, the LACPDUs (link aggregation control protocol data units) that the Switch sends or receives might be discarded, or the sending or reception might be delayed. If this situation occurs, a timeout message might be output or communication might temporarily stop. If the load is frequently excessive, increase the LACPDU sending interval or use static link aggregation.