Self assigned IP address

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Thanks ericdy

I reported earlier that ericdy had solved my problem (page one). But it kept coming back again and again.

Ok, I think I have a solution now. Before you do ericdy's solution, delete all the multiple locations (I had six locations)

>>System preferences >>Network >>Location drop-down >>edit locations

Delete all the locations. Then do ericdy's reset. Then it might work.

Grrrrrr to Apple.

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Ok, back again. That fix lasted all of one day, then back to the normal "self-assigned IP address" routine.

Grrrrr.

I went through each fix, one by one. This one appears to be holding up for three days now.

By jcdill on page 5:

a. Open your >>Preferences >>network settings >>Advanced >>TCP/IP tab for your wifi connection. The bad IP address is on line two.

b. In the TCP/IP tab click "refresh DHCP" until it refreshes to empty (no IP address). (Try with new client ID or ID empty, wifi on or wifi off.) - I had to hit 'refresh' nearly 20 times before it was empty.

c. Eventually, you will get the IPv4 Address to be empty. Stick with that. Press 'OK' and 'Apply', and try to reconnect with the router in the normal manner.

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I hope this is a permanent fix, because this is B annoying. Especially as my two iPads have had no problem whatsoever with this router…. !!!

Cheers,

Ralph

Grrrrrrrr. Back to square one, and locked out of my router.

i have resorted to a 25m ethernet cable, to link to the router, which works fine. But why is technology going backwards, to cables??

Does Apple not have an answer to this problem yet? And this is not a router problem, it is an Apple problem.

I have two ipads that will talk to the router.

I have a signal booster that will connect to the router, and both ipads will happily talk to the booster.

I used to have an iMac that would talk to both for a year.

But it first stopped talking to the booster, and now it has stopped talking to the router too.

What is going on here, Apple??

Maybe clearing the keychain is the trick but what worked for me was "safe boot" the mac, connect to wifi. This should work. This would modify your wifi settings for the access point you are trying to access. Re-boot.

PS. To "safe boot" the MAC, press the "shift" key while the system is booting.

Background: A few days ago a number of laptops/computers internet stopped working. Both PC and my MacBook pro. Now, a few days later, all the PCs have managed to connect by either changing the IP Address or other methods. We have changed the router as our technician thought that was the problem. My mac is still not able to connect.

Methods i've already tried: Changing the IP Address, deleting the memory of the network in keychain access, system preferences>network, configuring IPv4 manually, using DHCP and renewing DHCP lease, deleting the WiFi network in system preferences and restarting before making a new one.
Basically, everything i've read in forums, i've tried and nothing is working. Other than the methods i've seen, it seems to me that it's a problem with the router but as that was changed yesterday I don't see why it would be a problem.
Also, because there were a number of computers that had the same problem and the others have now been fixed, I don't understand...

Any more options would be greatly appreciated because though I can borrow other peoples laptops for internet, it would be much more convenient to use my own.

Also, is this a problem that will affect connecting only with that network or will it still be an issue connecting to other networks? If it's only on this network, I will worry less as in 3 weeks I will move home to England and not have to worry about this network again. I can probably survive 3 weeks without a connection here but will still be frustrated.

As I posted before, my description could have matched yours. For me, it turned out that I had a switch between the router and my Macbook (and other devices). All of them worked except the macbook. Swapping in another router cured it for everything except the macbook, Then I remembered the switch and power cycling that immediately fixed the error with the macbook. You must have at least one other friend with a router/swicth you can plug into to see if the problem is persistent on all networks.

Thanks for the reply jahjahjah.
Do you mean trying to use a different router all together? What do you mean by power cycling? I am currently living in Indonesia and don't really have access to another router/switch (though i don't think i'm clear on exactly what a switch is?)

Routers are connected to 2 networks, typically a WAN (wide area network-internet) and a LAN (local network). A switch is essentially a hub for connecting nodes on a network with more intelligence than a simple hub about what's hooked to each port. Most routers that are not server based have a switch incorporated in them so you can connect nodes (PC, printers, etc) to them directly but it is very common to have one or more other switches in a network between the router and your PC. In my case, the router caused a problem in the switch down stream from the router, upstream from my macbook. Since I had forgotten about that switch, I spend hours trying to find the problem on my macbook when a simple power cycling (unplug the power to the switch for a minute or so and then plug back in - do this instead even if the unit has a power switch) cured the problem.

Making a lot of configuration changes on the mac is risky because you do not know that something you tried hasn't broken the ability to connect as well and when you find the solution, you won't know it when you try it. Try to reverse anything you do that does not help before trying something else.

I had the same problem on just some of my networks (specifically at work) and it was very frustrating. I tried all the other solutions posted here and none worked. I am using Norton for mac and found that Norton Firewall was blocking the internet connection from my work's network. Goto Firewall Status in Norton and if you see a red X for your Network, if so, try clicking on this and "allowing" connections from this Network. This solved my problem, the other solutions on the page did not.

Well, of course, if you run Norton on a Mac or a PC, for that matter, you'll have lots of problems that will eventually resolve in the removal of Norton.

I have this problem today for the first time and I tried several solutions proposed here by other users but nothing worked.

What it worked was the following:

Network Preferences

Advance

TCP/IP

DHCP with manual address

Type an IP from other computer that is using the same network

Change the last digit of the IP you chose (two users don't use the same IP)

I hope you went to the DHCP server and exempted the address you used. You said you had at least one other computer, assumedly also a DHCP client, on your network so there is a chance it will get assigned the same address as the static address you assigned to your MAC.

HI, so I done what ericdy suggested and it worked. Then it stopped. I deleted all my locations and tried again. It worked for a little and then nothing. Ive been trying for three days now without a solution. I have tried just about everything I could find on different blogs. My mac is late 2013 Model if that helps any. Has anyone any other tips??

Thank you so much, this finally worked for me! Cheers mate 🙂

I fixed it very simply. None of the other fixes I found by browsing the internet worked for me and could have made things worse for me because I was deleting system information and going into Password Keychain and deleting stuff there. I was using the wifi supplied by the owner of the apartment and I was sharing it with other people when I started having the self-assigned problem.

I fixed the problem very simply by going to Network and deleting the problem Airport network and creating a new one. I did this by first deleting Airport in the left window (I have OS 10.6.8) by highlighting "Airport" and clicking on the minus sign below. This removed Airport from the list. Then I clicked the + sign and after a couple of seconds a small window popped up. It said select the interface and choose a name for the service. An airport interface came up as one of the choices without my having to do anything. I then named it "Airport 10". You can choose any name just not a name chosen before for an Airport network.

After that, I clicked "Create".

After a couple of seconds, the new network appeared in the left hand pane and the symbol next to it showed green indicating I was connected to the internet.

And the internet now worked.

You can do this any time you get the "self-assigned" message. I also fixed other network locations that had the Airport IP self-assigned problem. and they all work now when I use them.

So don't try anything else without trying my solution first as with my solution, you are not playing around with system files.

And if the problem crops up again, simply do the same thing. I actually first fixed the problem first at work using the wifi supplied at work but the fix also worked at home.