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Cisco Bug: CSCup78439 - Connecting IP Phone to any AP702 LAN Ports results in AP reset loop

Last Modified

Nov 19, 2018

Products (1)

  • Cisco Aironet 3700 Series Access Points

Known Affected Releases

8.0(72.204)

Description (partial)

Symptom:
When the AP is getting PoE from switch and phone is connected to AP port1, 2 or 3 powered by adapter/injector the following occurs:
AP detects the phone and generates the following CDP:
*Jul  8 12:49:25.071: %CDP_PD-4-POWER_OK: Full power - INJECTOR_DETECTED_MULTIPLE_MACS_ON_HUB inline power source

The switch cuts power to the AP and bounces the port

Conditions:
Connect an IP phone (9971 or similar) powered by AC adapter or power injector to any LAN port 1-3.
Be sure the AP is powered by PoE from the switch.
Be sure CDP is enabled on the switch port where the AP is connected.
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