Aironet 1200 Series, 1230 AG, and 1130 AG APs
The nominal voltage for 1200 Series APs is 48 VDC, and the AP is operational up to 60 VDC. You can power the 1200 Series APs in one of these ways:
∙A switch with inline power or a power injector that supplies power to the AP (PoE option)
∙An external power supply that provides power to the AP power port
Caution: Voltage that is higher than 60 VDC can damage the equipment. You cannot provide
redundant power to 1130 AG and 1200 Series APs with both DC power to the power port and inline power that a patch panel or switch to the AP Ethernet port provides. If you apply power to the AP from both sources, the switch or power patch panel can shut down the port to which the AP connects.
There are certain circumstances where an AP can end up without sufficient power and disable its radios. Assume that a 1130 AG Lightweight AP is connected to a controller. The lightweight AP is connected to a power injector as well as to a switch that is not capable of providing the inline power.
While the AP boots, with its Intelligent Power Management feature, it negotiates with the switch via Cisco Discovery Protocol messages in order to provide the necessary power to the AP. Even though the power injector is connected to the AP, the AP that uses this Intelligent Power Management feature gives priority to the Cisco Discovery Protocol information in order to identify whether or not the switch can provide the power. Therefore, after the Cisco Discovery Protocol message shows that the switch does not provide sufficient power (since it is not an inline power capable switch), the AP disables its radios. At this time, the status LED of the AP turns orange and this error message is recorded:
[ERROR] : AP <Ap mac−address> has not enough in−line power to enable radio slot 1