Specifications

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Cisco IOS Command Reference for Cisco Aironet Access Points and Bridges
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Chapter 2 Cisco IOS Commands for Access Points and Bridges
power inline negotiation
Usage Guidelines To help avoid an over-current condition with low power sources and to optimize power usage on Cisco
switches, Cisco developed Intelligent Power Management, which uses Cisco Discovery Protocol (CDP) to
allow powered devices (the Cisco Aironet 1130AG and 1240AG series access points) to negotiate with a
Cisco switch for sufficient power.
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 configure the access point to operate with older switch
software using the power inline negotiation command. Refer to the Troubleshooting section of the hardware
installation guide for your access point for additional information.
A power injector can be used to supply power to the Cisco Aironet 1130AG or 1240AG series access point.
If your switch supports Intelligent Power Management, the power injector will be detected without the need
for any configuration changes on the access point.
Note Cisco switches that do not support inline power can run software that supports Intelligent Power
Management. If your Cisco switch software cannot be upgraded, the access point must be
reconfigured using the power inline negotiation injector command.
Caution You must cautiously use the power inline negotiation injector override command because this command
causes the access point to enter high power mode without performing power checks and can potentially
cause an overcurrent condition in underpowered power sources. Always verify that a power injector is
correctly installed before using this command.
When an access point was previously configured with a power injector and you relocate the access point
to another switch port, you must use the power inline negotiation injector MAC address command with
the MAC address of the new switch port. You must verify that the power injector is correctly installed
before using this command.
Examples This example shows how to set up the Cisco Aironet 1130AG or 1240AG series access point to be
powered from a Cisco switch that can supply sufficient power but does not support Intelligent Power
Management negotiations:
AP(config)# power inline negotiation prestandard source
AP(config)# no power inline negotiation injector
This example shows how to set up the Cisco Aironet 1130AG or 1240AG series access point to be
powered from a power injector connected to a Cisco switch port that does not support Intelligent Power
Management. The access point automatically determines the MAC address of the switch port:
AP(config)# no power inline negotiation prestandard source
AP(config)# power inline negotiation injector installed
Related Commands Command Description
show running-config Displays the current running configuration of the access
point, which indicates how the access point is being powered.