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Half power problem with POE+ on Cisco Catalyst 3560-X

growl0001
Level 1
Level 1

Hi Everybody,

I have a problem with my Cisco Catalyst 3560-24P-S. When i connect my cameras that use POE for power they didn't start, so I checked through ios and se that the power consumption is only 15.4W.
Anyone can help me understanding why?


Here some info's

Switch>show power inline
Available:720.0(w) Used:15.4(w) Remaining:704.6(w)

Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi0/2 auto on 15.4 Ieee PD 4 30.0

Switch>show power inline GigabitEthernet 0/2 detail
Interface: Gi0/2
Inline Power Mode: auto
Operational status: on
Device Detected: no
Device Type: Ieee PD
IEEE Class: 4
Discovery mechanism used/configured: Unknown
Police: off

Power Allocated
Admin Value: 30.0
Power drawn from the source: 15.4
Power available to the device: 15.4

Actual consumption
Measured at the port: 4.1
Maximum Power drawn by the device since powered on: 4.4

Absent Counter: 0
Over Current Counter: 0
Short Current Counter: 0
Invalid Signature Counter: 0
Power Denied Counter: 0

Power Negotiation Used: None
LLDP Power Negotiation --Sent to PD-- --Rcvd from PD--
Power Type: - -
Power Source: - -
Power Priority: - -
Requested Power(W): - -
Allocated Power(W): - -

3 Replies 3

Reza Sharifi
Hall of Fame
Hall of Fame

Hi,

Try setting the power manually for that interface using this command

power inline static max  30000

And test again.

HTH

Hi Reza, thanks for reply,

i've tried to set manually the power and also to switch off all other network ports. The "show power inline" command tell me that the power is 30W BUT the camera didn't work. The camera works because I've tried in another cisco, same model.

I'm thinking of a hardware problem with poe, but if you have another suggestion i'm here!

Thanks

G.

Hi growl0001,

Hope you have found a resolution already but if not I m going to shoot from the hip a little here. 15.4 is the standard amount of power granted before a negotiation occurs and that seems to be what you are getting. Is your camera not a Cisco camera? In that case try adding "lldp run" to your config and I hope that will fix your problem.

If it does not, can you provide a show ip int br, a show cdp nei, and a show lldp nei?

Good luck,

David