Cisco Systems 1240AG manual Configuring Power Using Controller CLI Commands

Chapter 4 Troubleshooting 1240AG Series Lightweight Access Points

Low Power Condition for Lightweight Access Points

Note Independent of the power negotiations, the access point hardware also uses the 802.3af classification scheme to indicate the power required from the power source. However, the power source cannot report the power available to the access point unless the power source also supports Intelligent Power Management.

Some Cisco switches that are capable of supplying sufficient power require a software upgrade to support Intelligent Power Management. If the software upgrade is not desired, you can configure the access point to operate in pre-standard compatibility mode and the access point automatically enters full power mode if these Cisco switches are detected in the received CDP ID field.

When the access point determines that sufficient power is not available for full-power operation, the readios are deactivated and the Status LED turns amber to indicate low power mode (see Table 4-1).

If your Cisco switch is capable of supplying sufficient power for full operation but the access point remains in low-power mode, your access point or your switch (or both) might be misconfigured (see Table 4-2.

If your inline power source is not able to supply sufficient power for full operation, you should consider these options (see Table 4-2):

•Upgrade to a higher-powered switch

•Use a Cisco Aironet power injector on the switch port

•Use the 48-VDC power module to locally power the access point

Configuring Power Using Controller CLI Commands

Intelligent Power Management support is dependent on the version of software resident in the Cisco switch that is providing power to the access point. Each Cisco switch should be upgraded to support Intelligent Power Management. Until the software is upgraded, you can use your controller to configure the access point to operate with older switch software using these controller CLI commands:

1)config ap power pre-standard enable <ap>

where <ap> is the access point name on the controller

2)config ap power injector enable <ap> <switch port MAC address> (where <ap> is the access point name on the controller

and <switch port MAC address> is the MAC address of the switch port to which the access point is connected)

Note Refer to your controller documentation for instructions on using these commands.

Cisco Aironet 1240AG Series Access Point Hardware Installation Guide

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