To enable a Link Aggregation Group (LAG) on a Wireless LAN Controller (WLC), the following requirements generally apply:
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No more than two interfaces can be in the LAG. - This is often a limitation set by the WLC, especially in scenarios where LAG is used for redundancy and load balancing.
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The switch must use channel-group # mode on. - The switch configuration should support LAG, which typically involves configuring the switch ports to use the "mode on" setting to enable port aggregation.
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All distributed system interfaces must be added to the LAG. - For proper operation in a distributed environment, it's essential that the relevant interfaces are incorporated into the LAG.
The last option, The WLC must be rebooted, is not generally a requirement for enabling LAG, although it may be needed in some specific setups or configurations, but typically, LAG changes can be applied without needing a reboot.
So the correct answers are:
- No more than two interfaces can be in the LAG.
- The switch must use channel-group # mode on.
- All distributed system interfaces must be added to the LAG.