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Cisco Wireless LAN Controller Configuration Guide
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Chapter 7 Controlling Lightweight Access Points
Configuring Power over Ethernet
• Installed—This option examines and remembers the MAC address of the currently connected
switch port and assumes that a power injector is connected. Choose this option if your network
contains older Cisco 6-Watt switches and you want to avoid possible overloads by forcing a
double-check of any relocated access points.
Note Each time an access point is relocated, the MAC address of the new switch port will fail to
match the remembered MAC address, and the access point will remain in low-power mode.
You must then physically verify the existence of a power injector and reselect this option to
cause the new MAC address to be remembered.
• Override—This option allows the access point to operate in high-power mode without first
verifying a matching MAC address. It is acceptable to use this option if your network does not
contain any older Cisco 6-Watt switches that could be overloaded if connected directly to a 12-Watt
access point. The advantage of this option is that if you relocate the access point, it continues to
operate in high-power mode without any further configuration. The disadvantage of this option is
that if the access point is connected directly to a 6-Watt switch, an overload will occur.
• Foreign—This option causes the Injector Switch MAC Address parameter to appear. The Injector
Switch MAC Address parameter allows the remembered MAC address to be modified by hand.
Choose this option if you know the MAC address of the connected switch port and do not wish to
automatically detect it using the Installed option.
Step 5 Click Apply to commit your changes.
Step 6 Click Save Configuration to save your settings.
Using the CLI to Configure Power over Ethernet
Use these commands to configure PoE using the controller CLI.
1. config ap power injector enable ap installed
This command is recommended if your network contains any older Cisco 6-Watt switches that could
be accidentally overloaded if connected directly to a 12-Watt access point. The access point
remembers that a power injector is connected to this particular switch port. If you relocate the access
point, you must reissue this command after the presence of a new power injector is verified.
Note Make sure CDP is enabled before issuing this command. Otherwise, this command will fail.
See the previous section for information on enabling CDP.
2. config ap power injector enable ap override
This command removes the safety checks and allows the access point to be connected to any switch
port. It is acceptable to use this command if your network does not contain any older Cisco 6-Watt
switches that could be overloaded if connected directly to a 12-Watt access point. The access point
assumes that a power injector is always connected. If you relocate the access point, it continues to
assume that a power injector is present.
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