Workflow

When Fast PoE is configured on a port, the switch records the port configuration.

After the switch recovers from a power failure or while the main power (AC) to the switch is being restored, the switch identifies the Fast PoE and provides power to the port,

1. within 15 to 20 seconds after the power is established,
2. without waiting for the IOS to finish booting, and
3. even before the switch forwards network traffic.