You are setting up a Cisco access point in repeater mode with a non-Cisco point as the parent and you use this interface configuration on your Cisco access point. interface Dot11Radio0 no ip address no ip route-cache no ip route-cache ! ssid my WIFInetwork ! station-role repeater bridge-group 1 subscriber-loop-control bridge-group 1 block-unknown-source no bridge-group 1 source-learning no bridge-group 1 unicast-flooding bridge-group 1 spanning-disabled You are getting the following error message. Which reason for this issue is true? %DOT11-4-CANT_ASSOC: Interface Dot11Radio0, cannot associate. NO aironet Extension IE 

Answer options:

A. The parent AP MAC address has not been defined.
B. Repeater made only works between Cisco access points.
C. When repeater mode is used, unicast-flooding must be enabled to allow Aironet IE communications.
D. "dot11 extension aironet" is missing under the interface Dot11Radio0 interface.

B

Repeaters and bridges have to be the same manufacturer because there are some protocols that other manufacturers won`t accept.So Cisco Aironet to Cisco Aironet will work.Cisco Aironet to Cisco Linksys (and other manufacturers) will NOT workReference: Reference: https://supportforums.cisco.com/discussion/11308521/cisco-ap-1141-repeater-hp-procurve-problems