Arch Linux

fijam

Member

Registered: 2009-02-03

Posts: 244

Website

[solved] Problems with wireless / dhcp

I've been happily using Arch for the past two years but only recently I hit a problem I can't seem to solve on my own.

I have a wireless network at home, with WPA encryption and suddenly one day (probably after an update) I cannot get the IP address from my router over DHCP any more. The other PC at home (with Windows) works as it used to.

Details:

[fijam@hp510 ~]$ cat /etc/network.d/wlan 
CONNECTION="wireless"
INTERFACE=eth1
SECURITY="wpa"
ESSID="wlan"
KEY="xxxxxxxxxxxx"
IP="dhcp"
TIMEOUT="30"
DHCP_OPTIONS="-d"

[fijam@hp510 ~]$ cat /etc/dhcpcd.conf 
# Inform the DHCP server of our hostname for DDNS.
hostname

# A list of options to request from the DHCP server.
option domain_name_servers, domain_name, domain_search, host_name
# Most distributions have NTP support.
#option ntp_servers
# Respect the network MTU.
option interface_mtu

# A ServerID is required by RFC2131.
# Some broken DHCP servers do not send one and dhcpcd can work without it.
# Some broken DHCP servers NAK incorrectly and do not include a ServerID
# either so the default is to require a ServerID.
#require dhcp_server_identifier

# A hook script is provided to lookup the hostname if not set by the DHCP
# server, but it should not be run by default.
nohook lookup-hostname
noipv4ll

[fijam@hp510 ~]$ sudo netcfg -c wlan
:: wlan up [BUSY] 
dhcpcd: version 5.0.6 starting
dhcpcd: eth1: executing `/usr/lib/dhcpcd/dhcpcd-run-hooks', reason PREINIT
dhcpcd: eth1: executing `/usr/lib/dhcpcd/dhcpcd-run-hooks', reason CARRIER
dhcpcd: eth1: rebinding lease of 192.168.1.12
dhcpcd: eth1: sending DHCP_REQUEST (xid 0x55befbc9), next in 3.13 seconds
dhcpcd: eth1: sending DHCP_REQUEST (xid 0x55befbc9), next in 7.96 seconds
dhcpcd: timed out
 - DHCP IP lease attempt failed. [FAIL]

[fijam@hp510 ~]$ iwconfig 
lo        no wireless extensions.

eth0      no wireless extensions.

eth1      IEEE 802.11g  ESSID:"wlan"  
          Mode:Managed  Frequency:2.417 GHz  Access Point: 00:1E:37:EF:67:60   
          Bit Rate:54 Mb/s   Tx-Power=20 dBm   Sensitivity=8/0  
          Retry limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=68/100  Signal level=-59 dBm  Noise level=-89 dBm
          Rx invalid nwid:0  Rx invalid crypt:41  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:218   Missed beacon:0

Help would be appreciated, I am really out of ideas here.

Last edited by fijam (2009-08-06 15:35:32)

imrehg

Member

From: London, UK

Registered: 2008-04-10

Posts: 108

Website

Re: [solved] Problems with wireless / dhcp

Checking my own config (that works at the moment), the only meaningful difference i have "require dhcp_server_identifier" uncommented. Maybe you can try that....

Or check whether dhclient works any better (I usually prefer that one, not sure why, though...)

fijam

Member

Registered: 2009-02-03

Posts: 244

Website

Re: [solved] Problems with wireless / dhcp

EDIT: Actaully, dhcpcd still would not work while dhclient obtained IP without problems. I fixed the problem by adding -r <ip> to DHCP_OPTIONS in network.d file but I am still not sure why is it necessary.

EDIT2: Today -- not working again. I increased DHCP_TIMEOUT to 60 and it eventually gets the IP. I am surprised since the link quality is 77 and it had not been necessary before.

Last edited by fijam (2009-08-05 09:11:04)

diacritica

Member

Registered: 2009-08-06

Posts: 1

Re: [solved] Problems with wireless / dhcp

Same problem here. Dell Latitude E6400 with Intel 5100. I'm trying this with no success yet...

https://bugzilla.redhat.com/show_bug.cgi?id=468967

fijam

Member

Registered: 2009-02-03

Posts: 244

Website

Re: [solved] Problems with wireless / dhcp

This bugreport seems to cover a different problem -- my card would authenticate just fine, there were only problems with DHCP. Also, ipw2200 which I use does not have support for hardware encryption. I will mark this thread as solved and blame it on the crappy Sagem router.