I am transmitting 500 frames per second.
By the sheer number of frames that have
failed there may be some other contributing factor.
This stats is after approx 14.5 hours of
The difference of (rx frames
from antenna profile – 2*failed rx frames reported by athstats) is approximately
equal to the number of beacon frames (@100mSec) in 14.5 hours.
Any ideas on where to look ?
From: Wright, Brett
Sent: Wednesday, October 20, 2010
To: MOHAN.R.; firstname.lastname@example.org
Subject: RE: [Madwifi-users]
[SPAM] rx failed due to frame too short: madwifi0.9.4 r4119
I’ve noticed before that the station
increments this counter for every beacon received.
Of course beacons are valid frames and the
counter should not be incremented in that case so I believe it is a bug…
From: MOHAN.R. [mailto:email@example.com]
Sent: Wednesday, 20 October 2010
Subject: [Madwifi-users] [SPAM] rx
failed due to frame too short: madwifi0.9.4 r4119
Athstats of madwifi on the station reports
“nnnnnnn rx failed due to frame too short”
The number of failed frames is almost half the number of
received frames. Please see the report from athstats below.
I interpret this as every frame sent from the Master has
been retransmitted thereby loosing bandwidth .
The master does not have this problem.
From the code I see that this error is reported when a frame
is received that is shorter than the minimum 802.11 packet length.
Can anyone tell me why this happens and how to fix this ?
Report from athstats from station:
706 tx management frames
169241 long on-chip tx retries
700 tx frames with no ack marked
26533065 tx frames with short preamble
11602 tx frames with an alternate rate
123901 rx failed due to bad CRC
26534140 rx failed due to frame too short < =======
1648040 PHY errors
54 transmit override receive
13086 OFDM timing
309 OFDM illegal parity
157 OFDM illegal rate
164 OFDM illegal service
40 OFDM restart
1206517 CCK timing
4684 CCK header crc
274377 CCK illegal rate
148652 CCK restart
1768 periodic calibrations
rssi of last ack: 69
rssi of last rcv: 71
 tx 26533450 rx 53593258 < =============
 tx 0