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14 Link Aggregation
Figure 14-2 Examples of configurations in which link aggregation is not possible
(2) About configuring link aggregation
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. When you configure
link aggregation, first, change the status of the ports to link-down. After doing that, make
sure that the connections between switches are not in a configuration such as those in (1)
Configurations in which link aggregation is not possible, and then return the ports to the
link-up status.
(3) If CPU load is excessive
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 timeouts or
temporary communication interruptions frequently occur, the CPU might be overloaded.
Set a longer interval for sending LACPDUs, or use static link aggregation.
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