Catalyst 2960L provides insufficient power to POE+ devices

[Lukaviye]

My new Catalyst 2960L-24PS-LL Switch (15.2(6)E) fails to provide POE+ power to Linksys LAPAC2600C. The switch provides regular POE (15.4W) instead of POE+ (25W). The LAPAC2600C AP reports power source to 802.3af instead of the expected POE+ standard 802.3at.

This happens to four different Linksys LAPAC2600C access points.

Tried different ports on the 24-port switch.

The power budget is more than sufficient for all four AP.

Tried one AP at a time.

Tried rebooting a few times and unplugging.

Tried different cables for testing purposes.

When connected to a different IEEE802.3at-compliant switch, they all work flawlessly and receive sufficient power via POE+ without problems.

LLDP is enabled in the access points.

Thank you for any help.

[julian.bendix]

Hey!

Looks like the switch does not recognize how much power it should give to the linksys AP..

Could you post the output of "show power inline | include <port>" for the ports where your linksys APs are connected?

In the meantime, you can statically assign the needed amount of power to the port,
that is what I have always done in such cases..:

conft
interface <port>
power inline static 25000

... for 25W

Let me know if that works.

Best regards
Juls

[Lukaviye]

Hi Julian,

Here is the output:

#show power inline | include 16
Gi0/16 auto on 15.4 Ieee PD 4 30.0

#show power inline | include 14
Available:195.0(w) Used:46.2(w) Remaining:148.8(w)
Gi0/14 auto on 15.4 Ieee PD 4 30.0

I will try to assign static power and return here the results. Thank you for your help this far.

[julian.bendix · Accepted solution]

Hey!

Yeap the Output is showing that the Switch is just recognizing a standard IEEE PoE device.

Output shows that the Switch decided on providing 15.4W, and 30W would be possible on the switch.
Setting the power level statically as described should definitely solve this!
Maybe you'll have to bounce (shut/no shut) the port one time after changing the power level in order to reboot the AP.

For some reason the Switch is unable to determine how much power the linksys AP needs, or maybe the linksys AP is even advertising it wrong ..

BR
Juls

[Lukaviye]

Having a Cisco Catalyst 1000 at hand I tried that too. Same, they get lower power than needed. Must be the APs.

Thank you!

[Lukaviye]

As a final note, after an OS update:

The 2960L does see the AP as a category 4 POE device. Despite that, only supplies 15.4W on Automatic.

Setting the port to Static 25W POE the AP runs and remains stable.

[Leo Laohoo]

Upgrade the firmware first.

[Lukaviye]

Hi Leo, I tried that and it nearly bricked the switch. Using the web interface I upgraded by loading "c2960l-universalk9-mz.152-7.E2.bin" via WebUI from my laptop, and now I cannot access the web interface anymore. The page that loads looks like the attached image. I now need help to restore the WebUI. Please note that clicking on the "Web Console" link that is on this page, I get a "404 Not Found".

 

[Lukaviye]

Hi Leo, I tried that and it nearly bricked the switch. Using the web interface I upgraded by loading c2960l-universalk9-mz.152-7.E2.bin via WebUI from my laptop, and now I cannot access the web interface anymore. The page that loads looks like the attached image. I now need help to restore the WebUI. Please note that clicking on the "Web Console" link that is on this page, I get a 404 Not Found. Any help would be greatly appreciated.

 

[Leo Laohoo]

That is because you only copied the BIN file and did not update the HTML files.  

[truematic]

@julian.bendix apologies for asking questions on this old post.  I have this same problem with a non-Cisco AP.

How do you issue the power inline static command in the web gui CLI?  I can't do it and have been trying for at least an hour now. smh.  Thank you.