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poe problem on 2626-pwr

Marcus J
Frequent Advisor

poe problem on 2626-pwr

Hi,
I've got a very strage problem on a 2626-pwr.
When connecting a Cisco accesspoint "AIR-1231G-E-K9" to the poe-port it get this error message in the switch logs.

"port 21 PD Invalid Signature indication"

When connecting the accesspoint via a Cisco poe-injector between the switch and accesspoint it works ok!
4 REPLIES
Shadow13
Respected Contributor

Re: poe problem on 2626-pwr

is the device a 802.3af compliant ?
if not then enable the pre-standard because the error that you have mentioned is pointing to that.
try the below command.

#power-over-ethernet pre-std-detect
Shadow13
Respected Contributor

Re: poe problem on 2626-pwr

how many Power devices connected to the switch, also try to disable power then enable it again and check if it works

#interface 21
#no power
#power

Then check the status.
also for confirmation try another port in the same switch.

Regards
Marcus J
Frequent Advisor

Re: poe problem on 2626-pwr

i have tried different ports, will try to upgrade the switch firmware to the latest and try again.
On the cisco 1231G prestandard poe is default and not changeable through the WLC gui.

any other ideas?
Shadow13
Respected Contributor

Re: poe problem on 2626-pwr

i was refering to HP switch, enable pre-standard as mentioned above.