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Ticket #745 (new defect)

Opened 13 years ago

Last modified 13 years ago

can associate, can't get IP address from dhcp

Reported by: Assigned to:
Priority: major Milestone: version 0.9.x - progressive release candidate phase
Component: madwifi: other Version: trunk
Keywords: dhcp associate Cc:
Patch is attached: 0 Pending:


I have a laptop that can successfully associate and get an IP address via dhcp on my two home networks, one of which is a linksys wrt54g and the other is an SMC wireless router.

My school network is made up of mid to late 90's 802.11b wireless access points that I can't really identify, the only markings on them say "Lucent Technologies". After googling, it seems as though they are these:

It looks *exactly* like the ones on campus, however the ones on campus are 802.11b only.

Therefore, my guess is they are ocinoco based AP's.

The jist is that I *can* associate to the access points, I get a signal/noise ratio and all appropriate output in iwconfig. However when I try to get an IP address via "dhcpcd ath0 -t 20", it always times out, no matter what the value of timeout is. I check tcpdump logs and see 3 dhcp requests, 3 dhcp discoveries, and then it seems to quit.

I see no beacons, no broadcasts or anything else in my tcpdump log which makes me believe it cannot receive anything from the AP, because I know that it is broadcasting its essid. The capture was about 30 seconds long.

Change History

01/03/07 14:54:50 changed by dwalch at wu-wien dot ac dot at

I had the same problems. I could see the Access Points etc, but didn't get an IP from the DHCP server.

But for me following command solved the problem:

iwpriv ath0 mode 2

01/03/07 15:04:11 changed by dwalch at wu-wien dot ac dot at

I forgot to mention that I have an Atheros AR5212 (802.11abg) ethernet controller on an IBM Lenovo T60 Thinkpad