On 10/06/2011 05:52 PM, Scott Reed wrote: > Two reasons for the post: > 1) Clients can cause the whole AP to misbehave. > 2) Anyone have any trouble shooting tips on how to know whether to > check AP or clients first? >
In the worst conditions, a MT CPE with default configuration will retransmit the same frame 200-300 times per second at the lowest rate, consuming all available bandwidth. I've observed this in the field and on the bench. Getting stats from the AP/CPE to easily show when this is happening has proven quite difficult. I had to use a third station to do a TZSP sniff and analyze the data in wireshark in order to observe it. Setting frame-lifetime=1 (1 centi-second/10milliseconds), will drop that number to 20-30 frames per second. It sets a hard limit to how long the AP or CPE will spend retransmitting the same frame. So to answer your second question, you can try setting frame-lifetime=1 on all the CPEs. It shouldn't make a difference on good CPEs, but it will likely make the bad CPEs worse, bringing them to light. HTH, -- Kristian Hoffmann System Administrator [email protected] http://www.fire2wire.com Office - 209-543-1800 | Fax - 209-545-1469 | Toll Free - 800-905-FIRE -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
