Posted by: Yasir Irfan
In one of my previous articles I was talking about the POE compatibility issues between Cisco Catalyst 3750 E Switches and Cisco Aironet 1250 Series Access Point, I was getting following error.
Jun 21 08:30:28.447: %CDP_PD-2-POWER_LOW: All radios disabled – NEGOTIATED WS-C3
Jun 21 08:31:28.451: %CDP_PD-2-POWER_LOW: All radios disabled – NEGOTIATED WS-C3
After some research I figured out Cisco 3750 E Switch is capable of enhance POE , which can provide POE power of 20 Watts compared to standard 15.4 Watts per port, I updated the IOS for one my Cisco Catalyst 3750 E Switch from 12.2(35)SE5 to 12.2(53)SE2
Once the IOS update was done I used the following command on the particular port to provide 20 watts of power
ITKE-AS01(config-if)# power inline port max 20000
Then AP Started working normally and all the wireless radios were up and running as demonstrated below.