DHCP on WPA2 network doesn't work after reboot

I have the exact same problem and Apple say it is the wireless router, which is a Netgear and Netgear says it is the Mac. Meanwhile I set and stew. Have you found an answer?

i am using WPA2-PSK and it works fine, the only problem i had is that i had to reduce the size of my password to 10 characters because it just gave me al types of problems connecting otherwise

Well I have the same thing happeing to me with an Airport Express. It also happens to me with a Linksys at work. In both cases the security is either WPA2 or WPA and the security keys are greater than 10 characters. I have not attempted to lower the security of my wireless network, but this issue is driving me nuts.

In both cases the wireless network does not auto discover. I have to select the network. Then it says it does not have a key. I have to enter the key everytime I want to connect to the network after putting my macbook to sleep or after I shutdown.

The less than 10 character key in WPA did not work for me. It turns out that if I disable WPA or WPA2 and enable WEP everything works as normal. This seems to be a specific issue with WPAx. I get the same results with Linksys, Dlink, and my Airport Express.

Have you tried resetting your keychain all together. Try deleting your network, then reset your keychain, reboot, add your network and then try to reboot and see if it automatically connects. This worked for me, and it happend right after 10.4.7.

Same here... try this. Shut off Airport, then turn it back on again. Mine grabs the IP each time.

I have tried everything on this thread:
http://discussions.apple.com/thread.jspa?threadID=435452

wiping out my keychain is not really an option for me. I have over 400 elements in the keychain. Are you guys using WPA?

Don't use DHCP, it is a serious cause of most problems with networking unless you have very stable and highly tweakable networking equipment!

Statically assign the IP address to the wireless computer. As long as you SSID is hidden there are no more security risks than with DHCP

If you know the name by which you log onto the router with you can delete jsut the one Keychain link!

This worked for me:

Open Keychain access and click the "show keychains" button in the lower left corner. You should see at least 2 different keychains, one for your user name and one called "system". Select the "system" keychain. Find your password for your router and delete that saved password. Toggle Airport on and off, yo should be asked for the password again, enter it. Ever since I did that, mine has reconnected every time on restart. Hope it works for you.

Should 'a checked this forum first, just returned a Trendnet router after driving their tech support crazy and am now finding the same issue with a D-Link. I've been maligning the wrong guys! Funny that this is still an issue a year after it was first reported. I'll try some of these contortions, thanks alot. Have any of these kludges kept working over the long term?

Dave

Deleting the password in the keychain hasn't worked for me, which doesn't surprise me really because you're just putting yourself back in time to the place you were when you first tried to access the network with the laptop. I think you might have done something else you're not aware of. I've assigned a static IP address for this location and it works fine. Of course I'd love it if the problem were addressed by apple developers.

Thanks,
Dave

Don't use DHCP, it is a serious cause of most
problems with networking unless you have very stable
and highly tweakable networking equipment!

Statically assign the IP address to the wireless
computer. As long as you SSID is hidden there are no
more security risks than with DHCP

Nonsense. DHCP works fine without "needing" a static IP address, and the "masked" SSID offers no protection from discovery from someone who wants to hack ,just like MAC address filtering doesn't. A LOT of stuff is broadcast in the clear and SSID and MAC ID's are two of them.

I have used wireless and WPA on two Linksys boxes with all manner of wireless macs and it works just great. No experience with off brand routers but a new Linksys which is cheap as chips nowadays might be an idea.

The issue concerns WPA2, I'll experiment with alternative encryption but I chose that because it's supposed to be more secure. I'll give WPA a shot. I chose the D-Link because it says it's configurable on the mac but the linksys says on the box it needs windows so I gave it a pass. Thanks for the reply.

Dave

D-Link and Linksys (and I suppose a lot of other routers) are configured with a web interface to their default IP so I wonder why they persist saying they need Windows when they if anyone should know the OS is irrelevant. I am using a D-Link router (wired) with two Linksys routers acting as access points and they are all mac fine. WPA2 should work too, but starting with WPA is not a bad idea and it won't be broken into anyway, not for quite a while.