Self assigned IP address

Excellent solution. Thank you!

It helped me after a day of frustration: my mac would not connect to home wi-fi network at all but would to everything else.

One of the clues should have been the keychain password entry for the network as it was much longer and incorrect, compared to another mac's keychain entry which was connected to the same network. As soon as I saw your instructions I felt relief.

Totally worked - definately some sort of key chain conflict!!

Thank you so much! solved my problem so simply.

I know you seem to have got things sorted, but for others for whom this may not have worked, here is how I got over the "self-assigned IP" problem

system preferences>network>

with airport selected, go to "advanced" and then select TCP/IP

In the "DHCP Client ID" box (which is usually empty) put any random string of numbers

THEN renew the DNCP Lease,

It worked for me after trying a lot of other ways

PL

I've been searching forums for 3 days now and none of the 101 things I tried have worked until this.

THANK YOU THANK YOU THANK YOU!

Glad to be of help. I cannot claim credit but unfortunately have lost the original source for this (another, non-apple forum). It really is strange how many "final solutions" there are for this problem, that don't actually work in all cases.

Anyway - spread the word - maybe YOU can help someone get over this annoying problem

PL

Came home today and my wifi wasnt working again, tried the "random string of numbers" trick again but it didn't work this time. BUMMER. Guess it wasn't a permanent fix... any other ideas?

So sorry to hear that. The only other trick I have is the following. I don't know if it will help for you

Applying a manual IP under the Configure IPv4 selection should work. In your home router this will be 192.168.1.X . However, this for me is not where the problem lies - for me it is when out on the road using a third party WiFi, what IP to use?

You may find that your iPhone can pick up the network. If so, check your phone under settings / WiFi right arrow on chosen network and see what IP your phone has picked up. Put the same IP into your laptop using "Manually" - just use a different last digit

That the extent of my suggestions I am afraid!

PL

simply,

1- change DHCP to DHCP with manually address

2-enter new ipaddres

3-reset to DHCP again

This solution is not working for me. The random string in the DHCP worked once but has not worked since. Any other ideas? Would replacing the network card have an effect or is it software/settings issue?

Hi have you tried deleting the keychain password as described earlier in the thread? I had previously tried all the other methods and the problem kept recurring until that solution and I have been fine since.

Yes I deleted the network and my keychain passwords. I did it again a second time today just to be sure, still no connection. I used time machine to go back a few months and that didn't help either.

SO FRUSTRATED! Is anybody else still disconnected with the self assigned ip address? Any news from Apple on a fix? Maybe Mountain Lion will fix it, if I'm able to get connected so I can even upgrade!

Having the same problem. Have done all of the above suggestions. Have even tried hooking Ethernet to computer and still get self assigned ip address message. It's so frustrating. I work from home and am losing $ every minute I can't get online. Any other suggestions??

You should get a model that is something like EnGenius ESR9850. It aslo happened to me but when I bought the router, it worked fine.

I have CenturyLink and they claim I have to use their particular router for their service. I don't know if that is completely true, but it's what they tell me, so changing the router is not an option.