Enabling Power over Ethernet

PoE is enabled by default and power is automatically allocated to all PoE-capable ports on bootup. If the PoE power allocation is disabled on bootup using the no inline power command and the configuration is saved using the write memory command, all the saved PoE configurations are applied and PoE will not be enabled upon reboot. In such a scenario, PoE can be enabled as shown in the following example.

Enter global configuration mode.
```
device# configure terminal
```

Specify the interface to be configured in interface configuration mode.
```
device(config)# interface ethernet 1/1/1
```

To enable a port to receive inline power for power-consuming devices after changing the default behavior, use the inline power command for the appropriate port.
```
device(config-if-e1000-1/1/1)# inline power
```
Note: Do not configure inline power between two switches because it may cause unexpected behavior.
Once you have entered the commands to enable inline power, the console displays the following message after the PD is powered up.
```
device(config-if-e1000-1/1/1)# PoE Info: Power enabled on port 1/1/1.
```
Note: Downgrade is not supported in a stack, if the stack units have different PoE chip versions. For example, downgrade is not supported if the ICX 7450 stack has units with newer and older PoE chipsets.