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Network Warrior, 2nd Edition by Gary A. Donahue

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Troubleshooting

Here are some useful commands for troubleshooting a WAP. For me, the problems usually revolve around association. The command show dot11 associations is a great tool. If you have Cisco devices associated, it will even show you what they are:

Cisco-WAP#sho dot11 associations

802.11 Client Stations on Dot11Radio0:

SSID [Coolness] :

MAC Address    IP address      Device        Name            Parent         State
0014.a524.5b7a 192.168.1.129   ccx-client    hp-laptop       self           Assoc
001d.a231.6568 192.168.1.135   CP-7921       SEP001DA2316568 self           Assoc
001e.a98b.0018 192.168.1.120   unknown       -               self           Assoc
7c6d.62a4.6aad 192.168.1.110   unknown       -               self           Assoc

Keeping the monitor session active with the terminal monitor command is a must when troubleshooting association problems. This will ensure that console message are sent to your terminal session when you’re using Telnet or SSH to connect to the WAP. Here is the console output that resulted from a wireless client losing power:

*Mar  1 00:56:54.671: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating
Station 0025.0046.3f26 Reason: Sending station has left the BSS

Here is the resulting console message after power was restored:

*Mar  1 00:58:25.607: %DOT11-6-ASSOC: Interface Dot11Radio0, Station
0025.0046.3f26 Associated KEY_MGMT[NONE]

These debug commands can be very helpful when you are troubleshooting wireless authentication:

debug dot11 aaa authenticator process
debug dot11 aaa authenticator state-machine

If WPA or WPA2 Enterprise is enabled and RADIUS is involved, debugging ...

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