[Testing] some errors on iwconfig

Ronak Chokshi rchokshi at marvell.com
Sun Jul 1 13:11:46 EDT 2007

We have talked about populating link quality field with different sorts
of values but we haven't gotten a consensus on that yet. I will dig up
the latest email threads on that topic but suggestions are definitely
welcome. Link quality in a mesh network usually doesn't hold too much of
sense because there are several links to neighbor mesh nodes to start
with. So, there is not one RF link that can be justified as a candidate
for calculating link quality.





From: testing-bounces at lists.laptop.org
[mailto:testing-bounces at lists.laptop.org] On Behalf Of Michail Bletsas
Sent: Sunday, July 01, 2007 8:36 AM
To: supat at supat.eu.org
Cc: Dan Williams; testing at laptop.org; Kim Quirk;
testing-bounces at lists.laptop.org
Subject: Re: [Testing] some errors on iwconfig


I assume that you are using an XO. 
What OS build does it run? 

I am not sure how link quality is calculated and I never pay too much
attention to it. 
Points 2,3 and 4 are normal 


supat at supat.eu.org 

07/01/2007 10:46 AM 


Michail Bletsas <mbletsas at laptop.org> 


Dan Williams <dcbw at redhat.com>, testing at laptop.org, Kim Quirk
<kim.quirk at gmail.com>, "OLPC Developer's List" <devel at laptop.org>,
testing-bounces at lists.laptop.org 


some errors on iwconfig




always got below errors:

eth0      MRVL-USB8388  ESSID:"zxc555"  Nickname:"zxc55555"
          Mode:Managed  Frequency:2.412 GHz  Access Point: 
          Bit Rate:11 Mb/s   Tx-Power=15 dBm
          Retry limit:8   RTS thr=2347 B   Fragment thr=2346 B
          Encryption key:off
          Power Management:off
          Link Quality=100/100  Signal level=-83 dBm  Noise level=-98
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:22023
          Tx excessive retries:293  Invalid misc:648   Missed beacon:0

1. link quality alway 100% which is impossible
2. Rx invalid frag: always happen
3.  Tx excessive retries: always high
4. Invalid misc: alway increasing in numbers.

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