total 1092
drwxr-xr-x 2 root root 4096 Jan 15 2011 amd-ucode/
drwxr-xr-x 2 root root 4096 Dec 18 08:02 av7110/
-rw-r--r-- 1 root root 13424 Feb 5 2012 carl9170-1.fw
drwxr-xr-x 2 root root 4096 Dec 18 08:02 cis/
drwxr-xr-x 2 root root 4096 Dec 18 08:02 dsp56k/
drwxr-xr-x 2 root root 4096 Jan 15 2011 intel-microcode/
drwxr-xr-x 2 root root 4096 Dec 18 08:02 isci/
-rw-r--r-- 1 root root 340688 Dec 18 15:55 iwlwifi-5000-5.ucode
-rwxr-xr-x 1 root root 679436 Dec 18 15:54 iwlwifi-6000g2b-6.ucode*
drwxr-xr-x 2 root root 4096 Dec 18 08:02 keyspan_pda/
-rw-r--r-- 1 root root 2046 Dec 18 15:55 LICENSE.iwlwifi-5000-ucode
-rwxr-xr-x 1 root root 2046 Dec 18 15:54 LICENSE.iwlwifi-6000g2b-ucode*
drwxr-xr-x 2 root root 4096 Dec 18 08:02 r128/
drwxr-xr-x 2 root root 4096 Dec 18 08:02 radeon/
-rw-r--r-- 1 root root 4922 Dec 18 15:55 README.iwlwifi-5000-ucode
-rwxr-xr-x 1 root root 4796 Dec 18 15:54 README.iwlwifi-6000g2b-ucode*
-rw-r--r-- 1 root root 999 Feb 18 2012 usbduxfast_firmware.bin
-rw-r--r-- 1 root root 1770 Feb 18 2012 usbdux_firmware.bin
-rw-r--r-- 1 root root 8192 Feb 18 2012 usbduxsigma_firmware.bin

uname -a

inux localhost.localdomain 3.3.6-desktop-2.mga2 #1 SMP Thu May 17 16:25:59 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

Using network center and also mageia control center to configure, both are the same.

/sbin/ifconfig
eth0 Link encap:Ethernet HWaddr 78:2B:CBED:CD
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:55 Base address:0x8000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:28 errors:0 dropped:0 overruns:0 frame:0
TX packets:28 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1680 (1.6 KiB) TX bytes:1680 (1.6 KiB)

wlan0 Link encap:Ethernet HWaddr BC:77:37:1A:43:4D
inet addr:10.1.1.4 Bcast:10.1.1.255 Mask:255.255.255.0
inet6 addr: fe80::be77:37ff:fe1a:434d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1349 errors:0 dropped:0 overruns:0 frame:0
TX packets:1146 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1433596 (1.3 MiB) TX bytes:162477 (158.6 KiB)

I am using 4G - Wimax service,
it is DHCP, no need Proxy settings.

---------- Post added 12-19-12 at 11:14 PM ----------

It is ipv 4 only,
so ipv 6 is not selected.

I have not had any experience with 4G Wimax. From what I can see, you have the correct kernel module, and correct firmware on your system. So, at this point, not much more I can help with.

Only thing I can suggest, is try the system in another area ( move the system ) where this service is working for others.

Possibly someone here has experience with 4G Wimax, and can suggest some more things.

I summary, next time you open a thread, provide more information up front. I would have never responded to a thread knowing I know very little about this service. Much time has been lost by both of us.

I believe the driver of wifi is correct,
network setting is also correct.
right now my solution is to "disconnect and connect" whenever the connection does not work,
this solution works.
I am not sure why is it like that,
this does not happen in Ubuntu.

while there are a lot of very competent people here to help
it sounds like this might be a mageia specific problem
may I suggest asking at the official magiea forums
https://forums.mageia.org/en/index.php
if this is still a problem

I need to connect/disconnect a few times, then it works.
I consider problem solved. D