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Dell Optiplex Wake On Lan doesn't work even though the Wake On Lan setting is enabled in the BIOS.

SOLUTION

This is because the DEEP SLEEP setting is ENABLED in the BIOS.

• -enter BIOS.
• -expand POWER-MANAGEMENT.
• -click DISABLED.
• -click SAVE.

If that doesn't work, make sure the BIOS is the newest version.

Note that there are many possible outcomes based on the variables of the WOL bios setting, WOL network driver setting and DeepSleep bios setting. Dell has a matrix of possible outcomes here:
https://downloads.dell.com/manuals/common/dell-emc-remote-wake-up-config-dell-client-cmd-suite.pdf