iwconfig: Invalid misc

David Everly deckrider at yahoo.com
Tue Mar 16 09:15:31 EST 2004


Some additional info...

After adjusting iwpriv wlan0 dump, I now am seeing many instances
of "data_len=1508" in dmesg/syslog.  Since MTU=1500, is this a
problem?

Also, this is a Linksys WMP11.

--- David Everly <deckrider at yahoo.com> wrote:
> --- Joe Parks <jphstap at roinet.com> wrote:
> > In my case "invalid misc" was a truncated, WEP encrypted packet and
> > when
> > I saw them data loss became bad.   I was able to trigger them by
> > FTPing
> > files back and forth but small packets like pings didn't trigger
> > them.
> > 
> > So you should check to see if you can trigger them the same way. 
> If
> > you
> > can you should report your findings to the mailing list.
> > 
> 
> It is hard to say, but it doesn't seem that ping makes it better or
> worse.
> 
> Also, here is more data (it seems from below that RxFCSErrors=7793 +
> RxDiscardsNoBuffer=11 = Invalid misc:7804):
> 
> deverly at elbert:/proc/net/hostap/wlan0$ cat stats ; sudo iwconfig
> wlan0
> TxUnicastFrames=13955
> TxMulticastframes=0
> TxFragments=13979
> TxUnicastOctets=2042645
> TxMulticastOctets=0
> TxDeferredTransmissions=3881
> TxSingleRetryFrames=269
> TxMultipleRetryFrames=89
> TxRetryLimitExceeded=7
> TxDiscards=0
> RxUnicastFrames=12764
> RxMulticastFrames=129635
> RxFragments=142399
> RxUnicastOctets=8841219
> RxMulticastOctets=7389753
> RxFCSErrors=7793
> RxDiscardsNoBuffer=11
> TxDiscardsWrongSA=0
> RxDiscardsWEPUndecryptable=5
> RxMessageInMsgFragments=0
> RxMessageInBadMsgFragments=0
> wlan0     IEEE 802.11b  ESSID:"Syndere11a"
>           Mode:Managed  Frequency:2.437GHz  Access Point:
> 00:06:25:5D:A7:47
>           Bit Rate:11Mb/s   Sensitivity=1/3
>           Retry min limit:8   RTS thr:off   Fragment thr:off
>           Encryption key:597C-5C91-66B8-BF68-2205-96E9-CF   Security
> mode:restricted
>           Power Management:off
>           Link Quality:48/70  Signal level:-52 dBm  Noise level:-100
> dBm
>           Rx invalid nwid:0  Rx invalid crypt:5  Rx invalid frag:0
>           Tx excessive retries:7  Invalid misc:7804   Missed beacon:0
> 
> 
> 
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