My airport Extreme just stopped assigning IP addresses to wired devices

I have an fairly large home network that is run by an Airport Extreme.
- Comcast Cable Modem for 3 public (not static) IP addresses
- small switch to be able to obtain three addresses
- Apple Airport Extreme connected to the switch and it receives an IP address and internet connectivity from Comcast
- Airport Extreme connected to a 16 port Cisco switch to handle the wired connections in the house. I have 54 ports of which 9 are currently in use.
all wired devices connected through the wall and a patch panel to the Cisco switch.
The issue is that after working flawlessly for about a month (just moved into this house) it stopped today. any device going through the hardwired Cisco Switch is no longer getting an IP address from the Airport Extreme.
I replaced the switch with a second one to see if that was the failure and it is not.
I unplugged the Cisco Switch from the Airport Extreme and plugged devices directly into the Airport Extreme 1 by 1 and they were able to obtain IP addresses.
I need more than the three ports available on the Airport extreme.
What changed and what do I do?

I unplugged the Cisco Switch from the Airport Extreme and plugged devices directly into the Airport Extreme 1 by 1 and they were able to obtain IP addresses.
This tells you that the AirPort Extreme is working correctly and the issue....whatever it is....is appearing after the AirPort Extreme on the network.
A few thoughts:
You have tested the ports on the AirPort Extreme and they are working, so the next step would be to disconnect the Ethernet cable that runs from the AirPort Extreme to the switch at the switch, and then connect a laptop to the Ethernet cable to check to make sure that you are getting a good IP address that way.
If you cannot, then you have a bad Ethernet cable between the AirPort Extreme and switch that will need to be replaced.
If the laptop is getting a good IP address when you run this "test", then you know that the AirPort Extreme and Ethernet cable are working correctly and the troubleshooting focus must now move to the switch.
Check to make sure that you have an unmanaged switch. Or, if it is managed design, that it has been configured to operate as an unmanaged switch.
Next, connect the Ethernet cable from the AirPort Extreme to the switch and disconnect all of the other Ethernet cables that are connected to the switch and test each port one by one with your laptop and a spare Ethernet cable to make sure that each port is working correctly.
If you cannot get a good IP address on your first test with the laptop connected to the switch, then you know that you have a misconfigured or defective switch.
If the switch checks out OK when you test each port, then the next step is to connect one of the Ethernet cables that runs to another area, and connect your laptop to the Ethernet cable to make sure that the cable is working correctly. Continue to test each Ethernet cable the same way.
About 95% of the time in issues like you are having, the problem is bad wiring somewhere on the network, even though the "tech" said that he tested everything. The trick is to find it....when there are no shortuts.

Similar Messages

My Airport Extreme just stopped working. The message says ethernet cable not plugged in, but it is. Cable modem works fine. Is this a common problem?

My 2-year-old Airport Extreme instantly stopped working last night and is flashing the status light. The problem description is that the ethernet cable is not plugged in... however, the ethernet cable is still plugged into the cable modem. I checked the modem by plugging directly into my laptop... it works fine. Is this a common problem? Is there anything I can try other than sending it in for warranty repair?

At this point, before sending it back, I would recommend that you do the following as a minimum:
Power-down the modem, AirPort base station, and computer(s).
Disconnect the AirPort base station from the Internet broadband modem.
While all of the devices are powered-down, perform a "factory default" reset on the base station. This will get it back to its "out-of-the-box" configuration and make setting it up much easier, especially if you use the "Assist me" process within the AirPort Utility. (ref: Resetting an AirPort Base Station or Time Capsule)
After the base station resets, go ahead and power it back down.
Reconnect the AirPort base station to the Internet broadband modem. For the Extreme and Time Capsule, be sure to connect the cable to the base station's WAN (circle-of-dots) port.
Power-up the modem; wait at least 10-15 minutes to allow it adequate time to initialize.
Power-up the AirPort base station; wait at least 5-10 minutes. Note: The AirPort's status light may continue to flash amber after it has intialized. That is because, there may be some additional configuration items necessary, like setting up wireless security, before the overall setup is completed to get a green status.
Power-up your computer(s).
In this basic configuration, the AirPort base station will broadcast an unsecured wireless network with a Network Name (SSID) of Apple Network NNNNNN. Network clients, connected to the base station either by wire or wireless, should now be able to access the Internet through the ISP's modem. Once Internet connectivity has been verified, you can use the AirPort Utility to configure the base station for wireless security and any other desired options. Please post back your results.

Airport Extreme just stopped working

I have a airport extreme and and Airport Express. They have both been working on the same router for about a year or two. Now all of a sudden the Airport Extreme line doesnt work. I try to reconfigure and get the following message"Airport Utlity unable to find Airport wireless device after restarting." and goes on to say You may need to select your network from the WIFI menu and try again. Don't understand what this means? I have tried reseting the extreme hard and soft still will not find the airport connection or even the ethernet connection. Can these Extremes burn out ? Thank you for the help

It's not the power adapter. If it were, you would have no power at all going to the AirPort Extreme and you indicate that the port lights are functioning.
Power down the AirPort Extreme for 5-10 minutes and then restart the device. If you still see the same symptoms, I'm afraid that there has been an internal electrical component failure in the AirPort Extreme and it will need to be serviced or replaced.

Wireless Printing with Airport Extreme just stopped

Strangely, it is not working on one of my 3 computers only! Was working with all 3, today it would not print from my iMac with Intel 2.33 GHz.
No problem recognizing the printer. When I print the printer comes on, the printer head moves normally but a blank page comes out.
I have tried all the suggestions from Apple under the heading "Top Searches", subheading "Aiport Extreme/Express wireless printing" and I have also repaired disk permissions but nothing has changed.
Why would wireless printing work in an older computer and not a newer one? I have all the latest updates in BOTH the iMac and my Power Book so I can't blame a Security Update etc.
What now?
iMac Intel 2.33 GHz Mac OS X (10.4.10) Power Book G4, HP PSC 2410 All-in-one
iMac Intel 2.33 GHz Mac OS X (10.4.10) Power Book G4, HP PSC 2410 All-in-one

The exact problem for me. I also have checked all me settings, they seem to be
the way they should, but I can not get to print whatever.
I hope someone tell us what to do to make the printer work in an Airport
Extreme connection
PowerBook G4 Mac OS X (10.4.6) Airport Extreme Base Station and 2 Airport Express

Airport Extreme won't assign an IP address to OS 9.2.2

Is there a reason why my Airport Extreme won't assign an IP address using DHCP to a PowerMac G4 Quicksilver running Mac OS 9.2.2? The OS X partition running Tiger works fine.

I finally found that if I put and old dual-speed Netgear hub between the Airport Extreme router and the PM G4 Quicksilver running OS 9.2.2 everything works fine. Go figure!
Maybe one of the Mac gurus out there can tell me why this worked.

Airport and a self-assigned IP address - can't access wireless net

I have a strange issue with Airport picking up a wireless network.
I'm not in my usual location using my MacBook Pro.
There is a wireless network here.
Airport sees it, and asks for the password (provided to me).
Airport looks connected, but, I see the message: "Airport has a self-assigned IP Address and may not be able to connect to the internet".
And in fact, it cannot. I've run through the diagnostics routine twice, and no go.
How do I get Airport to accept an IP address from this wireless configuration?

I am having a nearly identical problem. The solution provided did not work for me.
We have two MacBook laptops, one is mine and the other my wife's. My laptop still works fine. The AirPort communicates well with the wireless router. My wife's laptop just started having this problem about a week ago. The latest Airport software updates helped, but did not solve.
The problem is that I now have to go into network diagnostics everytime to connect my wife's laptop to the wireless router. I have to re-enter the password to the router each time. Once I enter the password, it finds the IP address and connects everything properly. I checked the keychain password and it is there, so I don't know why it keeps losing the IP address.
One thing that I did preceded this problem. I changed my router password to WEP. If anyone knows if this could cause the problem, let me know.

Cannot connect to internet as Airport "has a self assigned IP address"?

I suddenly cannot connet to wireless internet as the Airport has a "self assigned IP address" whatever that is. I have tried removing other wireless connectons but it makes no difference. I'm trying to use the wireless connection at the hotel I'm stying in..its working fine on this computer. Any suggestions ...PLEASE?
Thanks

Hmmm... well, not what I was hoping to find b/c that is not really a helpful answer, l.b, but thanks for joining in on the discussion. I too just experienced the same problem. Yesterday I was connected just fine, a little slow, but connecting just the same. I was able to do my banking, browsing & what have ya. Today I get up and have no internet connection and my computer says it Airport has self-assigned an ip address and I cannot connect to the Internet. I haven't done anything different and as I can tell, they haven't done anything different either. My iMAC will not connect, but this piece of poop del mini will as will my iphone4 and all three of my kids' ipod touches. Soooo.... anyone else have a solution b/c I am totally at a loss here. I really need my iMac to connect. Got things to do that I can't do on here.

How do I get my airport extreme to stop recycling? Using OSX 10.7.4, Airport Utility 6.1

How do I get my Airport Extreme to stop recycling? I'm using OSX 10.7.4 and Airport Utility 6.1.

The Airport Extreme is putting out the signal OK. Gan use my iPod no prob. The Mac goes from 'On' to 'looking for networks' back and forth all the time.
As Apple has said the AirPort Extreme is functioning correctly if other devices can connect. You have a Mac issue, so that is really a question for the support area for your Mac.
I suggest that you try one of these general areas, then pick out the specific model that you have:
Desktop Computers Notebooks

My ipad recognizes my home network but will not connect to the internet. When I click on AirPort/preferences at the top of the imac screen it says..."AirPort has a self-assigned ip address and may not connect to the internet".How can I change ip address?

My ipad recognizes my home network but will not connect to the internet. When I click on AirPort/preferences at the top of the imac screen it says..."AirPort has a self-assigned ip address and may not connect to the internet". If this is the root of the problem,how can I change ip address?
Ipad will connect no problem to other networks.

First thing you need I think is to get your iMac connected to the Internet.
Shut down your iMac and you iPad. Then power off your router. Wait 30 seconds and power up the router.
After the router indicates that it is connected to the Internet then start up your iMac and see if it connects. If the iMac connects to the Internet then your iPad should too.
If this power up sequence doesn't work you'll have to dig into the router setup to make sure it is working properly.

Why does my Airport Express say "self assigned IP address"? No IP address for the ethernet, and it is not connecting to my cable router any longer...

Why does my Airport Express say "self assigned IP address"? No IP address for the ethernet, and it is not connecting to my cable router any longer...

Some cable providers.....like mine, a well known company......seem to take anywhere from a few moments to sometimes up to 30 minutes to allow their equipment back at the cable company to fully reset and issue a new fresh connection.
So, it would not hurt to leave things powered down for 15-20 minutes or more when you perform the reset that John Galt suggests.

My Airport Express just stops working. Computer keeps searching for it. DSL modem is OK. Have to unplug Airport Express and replug to get it to work again. Starting happening sporaticaly some time ago, but now it is about once a day, maybe twice a day. Ha

My Airport Express just stops working. Computer keeps searching for it. DSL modem is OK. Have to unplug Airport Express and replug to get it to work again. Starting happening sporaticaly some time ago, but now it is about once a day, maybe twice a day. Has v.6.3 on it. Supposedly up to date.What's the problem?
Has anyone had that happen? Solution? (other than purchase a new one.......)

My Airport Express just stops working. Computer keeps searching for it. DSL modem is OK. Have to unplug Airport Express and replug to get it to work again. Starting happening sporaticaly some time ago, but now it is about once a day, maybe twice a day. Has v.6.3 on it. Supposedly up to date.What's the problem?
Has anyone had that happen? Solution? (other than purchase a new one.......)

"Airport has a self assigned IP address & cannot connect to internet"

Hi, I'd appreciate any insight at all on this...
Apologies in advance for this vast post...!
(but I guess I may as well mention everything I've already tried...)
BACKGROUND:
I was recently trying to add an Airport Express Base Station to an existing ethernet and wireless network, which has been working flawlessly for 3 years.
(Network consists of an ethernet-connected G4 Dual 1.42 desktop running OS X.3.3, and two wireless-connected iBooks- one a 12" running OS X.3.5, the other a 14" on OS X.4.2).
For various reasons, I've now given up with the Airport Express, but ...
PROBLEM:
On the wireless 12" iBook- "Safari can't open the page "xxx" because it can't find the server "xxx"- ie, the internet connection is now wonky.(The problem is the same in Firefox, IE, and Camino too).
The fault must be with configuration on this laptop, as the other two machines on this network are still running and connecting normally with no problems at all.
What is the cause of this problem? (IP addresses? DNS server?)
WHAT I'VE TRIED SO FAR:
1. First looked at System Preferences --> Network --> Network Status, where I see this;
"Airport is connected to the network "Fritz!Box SL WLAN". Airport has a self-assigned IP address and may not be able to connect to the Internet."
Alongside it an amber button (which is usually green).
Then according to JohnHuber1's suggestion in Discussions on May 3rd 2006;
"Go to System Preferences --> Network and double click on Airport to open its preferences. Click on theTCP/IP tab and select Configure IvP4: "Using DHCP" and click on Apply Changes to save it."
I tried toggling this (it was already set this way), and then Restarted, but it hasn't helped.
I also tried clicking the 'Renew DHCP lease' button. Also hasn't helped.
2. Repaired permissions. It hasn't helped.
3. Read Apple KB article No:106798- 'Troubleshooting "Server could not be found" messages'.
From this article, it seems that
a) The problem cannot be caused by "an actual loss of internet connection", as the other 2 machines are still connecting fine.
b) Typing http://17.254.0.91 instead of http://www.apple.com makes no difference, therefore it doesn't APPEAR to be a DNS server problem. (?)
4. Tried to reconfigure the Airport settings using Network SetUp Assistant.
This allows me to select Airport as my connection method, select the network from the list; but once I've entered the network password and pressed 'continue', it then gives me a dialogue box, saying
"Unable to establish a network connection. Your computer could not connect to the internet. Click OK to go back and change your network settings and try again".
Returning to Network Prefs, I now see a box saying "Your Network Settings have been changed by another application".
I can't seem to get out of that vicious circle.
5. Opened a fresh Test Account, behaviour is the same here as in the regular user account.
6. Opened Network Utility, tried to 'Ping' on 17.254.0.91 (Apple site). Then tried to Ping my network router (192.168.178.1), and then also the other 2 computers on the network. Result in each case was "10 packets transmitted, 0 packets received, 100% packet loss".
What can I do to fix this problem? I suspect it's some small configuration checkbox in Network preferences which I've inadvertently altered.
But have I got any idea what I've done...?
Sorry for the epic post. But you get the idea...!
Thanks for your thoughts...
G4 Dual 1.42, FW800, 2GB RAM, (OSX.3.3), iBook G4 (1.2ghz, 1GB RAM, OSX.3.5) Mac OS X (10.3.3) 3 int.HDs, 3 Lacie ext.HDs, Logic Pro 6.4, RME Fireface 800.

Hi Grant, thanks for jumping in...
Have you removed the troublesome Airport Express?
Certainly have, that was Step 1 several days ago!
Are you using encryption?
Yes, I have to enter a password every time I've tried to use Network Set Up Assistant. I'm pretty sure I've got it right- it won't accept anything else.
Have you limited your network to only certain M.A.C. Addresses?
Not as far as I'm aware. Could I have done it inadvertently?
Is the Wireless Router set to allow the connection of slower 802.11b devices like the iBook?
Guess it must be... it worked fine before, and is still ok with the other 14" iBook.
Are you connecting to a Wireless Router and not to another Macintosh computer?
Hmm... I ASSUMED I was connecting to the WLAN router. The G4 desktop has no wireless capability itself, could I still be connecting to that regardless?
Internet access has never been affected in the past by that machine being on or off...
You will not be able to get anywhere until you have an IP address in the same subnet as your Router
(generally high octets the same, last octet different). Can you think of any reason why your Router
should not give you an IP address in this range?
Err... now I'm lost, sorry! What's an octet?
I really appreciate you taking the time to help me out Grant... sorry I'm not really up to speed!
Cheers, Andy.

Connectivity Issue: "Airport has a self-assigned ip address..."

I've been using the same wireless network via AT&T with their own wireless modem/router that they provided for the past six months. Never had an issue EVER. Now....suddenly, it says "Airport has a self-assigned ip address and may not be able to connect to the internet."
OK. I jumped on my girlfriends IBM, it and all the other PC computers in our house work FINE. I can also directly connect to the router via an ethernet cable and connect FINE.
So I open up the router settings in my browser and notice that the IP address the router says my computer has is 192.168.1.100. This is not the IP address my network settings displays when I get a DHCP lease. So... I select "manually" instead of "automatically via DHCP" and type in the IP address the router seems to think my computer is. Now in the "show network status window" it says that "Airport is connected to the network" but I still can't connect to the internet.
This is driving me completely bat **** crazy. Nothing has been changed in the wireless settings on my computer, any other computer in the house, or the router itself. This seems to have happened randomly, after searching all over the internet I can't find any solution that works for me. anyone know what's up?

As you may have gathered, this message appears when the computer has failed to obtain an IP number from the router using DHCP, so it self-assigns a fallback number which, since the router doesn't know it, prevents connection to the internet.
The obvious first step is to turn everything off, and then boot the router and each of the computers, one at a time, so that each should get a new DHCP lease. All the IP numbers should be issued and obtained automatically.
This thread offers some solutions, some of which have worked for some posters:
http://discussions.apple.com/thread.jspa?threadID=1417058&tstart=0

I getting airport has a self-assigned ip address and may not be able to connect to the internet

I getting airport has a self-assigned ip address and may not be able to connect to the internet

I have got exactly the same message after we re-configured our router. I was connecting using my iMac wirelessly before hand, but now cannot. Our other PCs can connect wirelessly to the router so it's not the router. I have also tried the firewall solution but that doesn't work either.
I did call Apple Support who said that a full troubleshoot would cost £35 as my computer is older than 90 days (well yes it's been working fine that's why it's over 90 days old, it's only now that it isn't!). He said a trouble shoot didn't guarantee success so I declined his offer to charge me an extortionate amount of money for nothing! He did say that the router needs to be giving the Airport an IP address, but it isn't doing it now. His only suggestion was to turn off the router and turn it back on or power down the iMac. Neither of which help.
Anyone else had any success?

Airport has a self assigned IP address. Why and how can I fix it

Airport has a self assigned IP address and can't connect to the internet. Why and how can I fix it?

First thing you need I think is to get your iMac connected to the Internet.
Shut down your iMac and you iPad. Then power off your router. Wait 30 seconds and power up the router.
After the router indicates that it is connected to the Internet then start up your iMac and see if it connects. If the iMac connects to the Internet then your iPad should too.
If this power up sequence doesn't work you'll have to dig into the router setup to make sure it is working properly.

My airport Extreme just stopped assigning IP addresses to wired devices

Similar Messages

Maybe you are looking for