Is that enough to keep a bad CPE from taking down the AP? Greg On Oct 7, 2011, at 3:23 PM, Kristian Hoffmann wrote:
> 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 > kh...@fire2wire.com > 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: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
