LinuxQuestions.org - dhcpcd ath0 fails, works for eth0

- Linux - Wireless Networking (https://www.linuxquestions.org/questions/linux-wireless-networking-41/)

- - dhcpcd ath0 fails, works for eth0 (https://www.linuxquestions.org/questions/linux-wireless-networking-41/dhcpcd-ath0-fails-works-for-eth0-402603/)

dhcpcd ath0 fails, madwifi problem

so i was successfully browsing wirelessly using the madwifi-ng driver for my atheros chip. however, i ran some suse 10 updates (including a kernel upgrade) and now things are messed up. after getting a strange error when trying to create ath0, i reinstalled madwifi-ng. it worked.. now i'm able to scan for access points and even connect to them. however, 'dhcpcd ath0' times out every time. 'dhcpcd eth0' works just fine; in fact i'm using it now. any ideas?! can i somehow reset dhcpcd?

here is my output when trying to connect using wlanassistant. dhcpcd times out when doing this manually too...

Code:

ACTION: CONNECT.

ifup: /sbin/ifconfig ath0 up

iwconfig_set: /usr/sbin/iwconfig ath0 essid hayden_wireless2 mode managed channel 6 key open xxxxxxxxxxxxxxxxxxxxxxxxxx

iwconfig_ap: /usr/sbin/iwconfig ath0 ap 00:90:4B:34:40:BC

ifconfig_dhcp: /sbin/dhcpcd -nd ath0

...file '/var/run/dhcpcd-ath0.pid' does not exist - no DHCP lease present.

CONNECTION FAILED.

after scanning and connecting to the access point manually...

Code:

delilah:/home/josh # iwconfig ath0

ath0      IEEE 802.11g  ESSID:""

          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:90:4B:34:40:BC

          Bit Rate:0 kb/s  Tx-Power:18 dBm  Sensitivity=0/3

          Retry:off  RTS thr:off  Fragment thr:off

          Encryption key:XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XX  Security mode:restricted

          Power Management:off

          Link Quality=0/94  Signal level=-95 dBm  Noise level=-95 dBm

          Rx invalid nwid:2106  Rx invalid crypt:0  Rx invalid frag:0

          Tx excessive retries:0  Invalid misc:0  Missed beacon:0



delilah:/home/josh # dhcpcd ath0

...and it simply never responds.. well, it eventually just times out.

maybe things are connecting as i thought they were.. notice the link quality.
now, if i run 'iwconfig ath0', i get the same results, only it thinks it's 802.11a now, when it's really g.

thanks for the help,
josh

this may also help...

Code:

delilah:/home/josh # tail -f /var/log/messages

...

Jan 12 16:31:04 delilah kernel: ath0: no IPv6 routers present

Jan 12 16:32:04 delilah dhcpcd[13747]: timed out waiting for a valid DHCP server response

madwifi is known to have problems with dhcp (namely with wpa_supplicant)...I'm not sure if that also applies to what ur doing.

http://www.thinkwiki.org/wiki/Wpa_su...nt#For_WPA-PSK

Quote:

NOTE!
At the moment there is a problem within the madwifi driver or wpa_supplicant passing dhcp. That´s why I use a fixed IP.

There are two patches one for wpa_supllicant (http://hostap.epitest.fi/bugz/show_bug.cgi?id=63) and one for madwifi
(http://article.gmane.org/gmane.linux...fi.devel/1275). Each one is supposed to work.

hey dude i'm having a similar problem on my ubuntu. I'm using realtek rtl8185. I also get no ip-v6 routers found. I'm pretty sure there is something messed up with that. I'm gonna do more digging and see what i can find.

hmm.. ok.. mine scans just fine.. just the DHCP fails. i'm not using WPA either.

Thanks for the responses.. let me know what you find.

Josh

For some reason,

#ifup ath0

worked for me

I am using FC4.madwifi latest cvs,dwl-520

(Did someone try upgrading the dhclient ?)

ath0: no IPv6 routers present

Hi, all,
I am having the same problem with FC4 and Madwifi drive.
iwconfig sees the AP, and the AP sees the MAC address, but I simply could not get a dhcp address.
The dmesg reports this: "ath0: no IPv6 routers present".

Is there any expert out there that can help?

Thanks

Quote:

Code:

delilah:/home/josh # iwconfig ath0

ath0      IEEE 802.11g  ESSID:""

          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:90:4B:34:40:BC

          Bit Rate:0 kb/s  Tx-Power:18 dBm  Sensitivity=0/3

          Retry:off  RTS thr:off  Fragment thr:off

          Encryption key:XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XX  Security mode:restricted

          Power Management:off

          Link Quality=0/94  Signal level=-95 dBm  Noise level=-95 dBm

          Rx invalid nwid:2106  Rx invalid crypt:0  Rx invalid frag:0

          Tx excessive retries:0  Invalid misc:0  Missed beacon:0



delilah:/home/josh # dhcpcd ath0

why is it you have no essid?
iwconfig ath0 essid ssid_name