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While learning for my CCNA exam, I was looking over Cisco's PoE guide. It explains how to configure PoE so that a port changes its behavior when a device draws too much power:

power inline police: Shuts down the PoE port, turns off power to it, and puts it in the error-disabled state.

power inline police action errdisable: Turns off power to the port if the real-time power consumption exceeds the maximum power allocation on the port.

It says below:

If you do not enter the action log keywords, the default action shuts down the port and puts the port in the error-disabled state.

So what is the difference between power inline police and power inline police action errdisable?

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#Power inline police command is equivalent to the #power inline police action errdisable. Another option is the #power inline police action log. First, two would put the port into an error disable state, 3rd one would only notify, and generate a log entry. You can always confirm by issuing command:

Switch# show power inline police
Available:623(w)  Used:6(w)  Remaining:617(w)
Interface Admin  Oper       Admin       Oper         Cutoff Oper
          State  State      Police      Police       Power  Power
--------- ------ ---------- ----------  ----------   ------ -----
Gi2/1     auto   off        none        n/a          n/a    0.0
Gi2/2     auto   on         none        n/a          n/a    16.7
Gi2/3     auto   off        errdisable  n/a          0.0    0.0
Gi2/4     auto   on         errdisable  ok           16.6   11.4
Gi2/5     auto   on         log         ok           16.6   11.2
Gi2/6     auto   on         errdisable  overdrawn    0.0    0.0

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