May 2011
Intermediate to advanced
788 pages
23h 34m
English
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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 AssocKeeping 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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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.