Intel PRO/Wireless LAN 2100 บน Debian 4 R3

โน๊ตบุ๊คก็เก่า เจ้าของก็แก่ เอ้อ! แต่ยังไงก็ยังรักมันครับ ยังถึงแม้จะ CD Drive เจ๊งแล้ว การ์ดแลน ก็ไม่ค่อยสบาย ลง xubuntu ก็ใช้งานได้ดี  นึกสนุกอยากเล่น Debian อีกซักรอบ ตอนติดตั้ง Debian ก็มองไม่เห็น Wireless LAN ชักจะบังไง ubuntu รู้จัก แต่ Debian ไม่รู้จัก ชักจะยังไงแล้วเนี่ย เอาไงก็เอา ติดตั้งจนเสร็จ ก็ลองค้นหาวิธีการติดตั้ง ก็เจอที่นี่ครับได้ผลครับ โล่งอกไป

http://blogs.cocoondev.org/michaelm/archives/002084.html

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September 02, 2004

Intel PRO/Wireless LAN 2100 on Debian Dell Inspiron 8600

If you are running Linux on a Centrino Machine, there exists several options to get wireless networking running. Namely native driver support, or windows driver wrapping. Both of these are Open Source Sourceforge projects

There is also a commercial wrapper based driver available here.

I have decided to use the the native solution.Here are the steps I went through to get wireless going.

1. Configure the kernel (to support wireless)
2. Download and install firmware
3. Download wireless tools and install (Debian package available)
4. Down the IPW2100 source (Debian package available)
5. Load the module.
6. Configure the interface

Configure the Kernel.

Note that im using kernel 2.6.6

Ensure that
* "Wireless extensions" and
* "Hotplug firmware loading support" are selected in the kernel config.

I originally ran into problems when trying to add keys using iwconfig.

iwconfig eth0 key 1234-5678-abcd-efgh-ijkl-1234-56
Error for wireless request "Set Encode" (8B2A) :
SET failed on device eth0 ; Operation not supported.

As it turned out that, i didnt have the correct cypher support in the kernel!
So make sure your kernel is configured to support the "ARC4 cipher algoritm" and the "CR32c CRC algorithm".

Now compile the kernel.

Download and Install Firmware.

As far as I know there is no debian package for this.

Download ipw2100-fw-1.2.tgz and untar..
ipw2100-1.2.fw BSS mode
ipw2100-1.2-i.fw IBSS mode
ipw2100-1.2-p.fw Monitor mode

You will need to place all of these files into the hotplug firmware directory
typically /usr/lib/hotplug/firmware/

Download Wireless Tools and Install.

On Debian its as simple as:
apt-get install wireless-tools (version i have is 26+7pre25-2)

Download the IPW2100 Adapter Driver
A prepackaged Debian package containing the source code for this driver already exists for this. I used version 0.53-1

sudo apt-get install ipw2100-source
sudo module-assistant a-i ipw2100

the above command will auto-magically build the module for you.

Load the Module..

modprobe ipw2100
The 'iwconfig' command should now list something like this

eth1 IEEE 802.11b ESSID:"" Nickname:"ipw2100"
Mode:Managed Frequency:2.412GHz Access Point: 00:00:00:00:00:00
Bit Rate=0kb/s Tx-Power=32 dBm
Retry:on RTS thr=2304 B Fragment thr:off
Power Management:off
Link Quality:0 Signal level:0 Noise level:158
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

Configure the Interface.

Add the required encryption key, example

iwconfig eth1 key 0123-4567-89

Under Debian add the following line to
/etc/network/interfaces

auto eth1
iface eth1 inet dhcp

Now bring up the the wireless interface
sudo ifup eth1

You should now be assigned an IP address on eth1, and that means you
should be ready for many hours of happy wireless computing.....

Posted by michaelm at September 2, 2004 12:56 PM
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