Power configuration on a Cisco 2960 switch

[t-rimmer]

I am using a Cisco 2960 switch with PoE for network equipment including IP Phones. The switch supplies power to the phones fine. Several of the phones also have a wireless headset attached to them. It seems like after the headset is used for a while and is put back on its dock to recharge, the phone powers off for a little while. I'm guessing the 6.1 watts of power that was allocated dynamically from the switch to the phone was enough to power the phone, but the power draw to also charge the headset exceeds that and the phone shuts down while new power requirements are negotiated. 

Is there a better way to configure power without having to manually allocate 11 watts for every port that could possibly have a phone and a headset?

Thank you.

[Leo Laohoo]

Depends if the phone supports CDP or LLDP.
Otherwise one can statically assign the PoE watt required on a per-port basis.

[Deepak Kumar]

Hi,

I agree with @Leo Laohoo its depend on the LLDP/CDP negotiation for POE requirement. We don't have much information on your case such so It is advised to set static POE.

Meanwhile, you can collect logs from the switch as "Show logging",  "debug ilpower powerman", "debug ilpower evet" etc.

Regards,

Deepak Kumar

[t-rimmer]

I appreciate the feedback. The IP phone is a Mitel phone. I think it understands CDP because it shows up when I do a show cdp neighbor.

Device ID                    Local Intrfce   Holdtme Capability Platform Port ID

SEP08000FC45001    Gig 0/37           134           H P                  Port 1

The error message we get when the problem occurs is: "_PORT_ERR: Controller port error, Interface Gi0/37: Power Controller reports power Imax error detected". If I do a show inline power, that ports shows to have 6.1 watts of power allocated with 30 watts maximum available: 

Interface     Admin  Oper           Power    Device                        Class  Max
                                                 (Watts)
--------- ------ ---------- ------- ------------------- ----- ----

Gi0/37       auto     on                6.1                                           2        30.0