lwalter:~ # cat /proc/net/nokia_cs
WLAN NetDev =eth1
WLAN MAC =00:e0:03:09:19:52
WLAN ChrDev =nokia_cs
GSM TTYDev =ttyNC0
GSM ChMajor =204
GSM ChMinor =42
GSM status =off
WLAN status =initialized
WLAN state =initialized
WLAN BSSID =00:00:00:00:00:00
WLAN SSID =Not Joined
WLAN mode =AdHoc
WLAN known BSSs:
#00 ! 1057 ! 00:40:05:5e:26:77 ! 10 ! 22 ! 11008 ! any
The mac off the BSSs is ok., thats my DWL-2000AP !
Why WLAN mode =AdHoc (in nokia_cs.opts = infra) ?
tail -f /var/log/messages
Aug 25 09:48:39 lwalter kernel: D211: Scan result from ssid: any: channel=10
Aug 25 09:48:50 lwalter kernel: D211_Error: Received bssinfo has unknown rates?
Aug 25 09:48:50 lwalter last message repeated 3 times
Aug 25 09:48:50 lwalter kernel: D211_Error: Unknown Information Element in bssinfo: 42
The DWL-2000AP works with TX-Rates 5.5 Mbps
What is wrong ?
Standardisation improved to fix problems with 802.11g devices
The Nokia D211 interoperability problem reported with 802.11g pre-standard and 802.11b proprietary 22Mbps mode devices have been caused by the new higher data rates provided by these new AP's. Other manufacturers have reported similar problems with their 802.11b terminals. The IEEE standardisation forum has also noticed this and taken actions to improve interoperability with legacy 802.11b devices. This is carried out by adding "extended supported rates" information element (IE) to 802.11g management frames.
This means that it isn't anymore necessary to put all available 802.11g data rates (including .11b ones) to the "supported rates" Information Element. Legacy 802.11b devices keep using old IE and shouldn't mind the extra IE which they don't undestand. 802.11g device however needs to understand both old and new "extended" IE to fully interoperate.
This should solve most of those problems with 802.11b devices unable to handle the additional data rates in "supported rates" Information Element.
At least some 802.11g vendors have already changed their implementation to follow these changes. For example Buffalo AirStation G54 (AP that originally caused problems with D211) has a new firmware update available.
We have tested this briefly now and it seems that the original D211 v.4.33 software interoperates with the Buffalo G54 AP running latest firmaware.