MacBook Pro :: Persistent IP Address Conflict On Airport?
Feb 21, 2012
I have about 60 users on my network with a router assigning DCHP leases to all machines.There is an airport extreme in bridge mode which is expanded with another airport extreme that are connecting the router to about 35 machines. There is a 50/50 mix of mac and pc.ONLY the macs are having a IP conflict issue.
Problem:IP Conflict errors only on the wireless connection throught Airport on Macbooks.I did have 1 iMac have this problem, but they are fine for the most part.It seems the MAC just will not let go of its previously issued address and is persistently re-asking the router for the address, kicking back the error.I try to have it clear the previous DCHP with no luck.
I have tried:
-Renew the DCHP lease
-Reboot Machine
-Repair Disk Permissions
-Update Software (Happens on both OSX10.6 & OSX10.7)
-Remove/Recreate Wireless Network ProfileÂ
If I just assign a manual address, it works. I don;t want to do this to everything on the network and I would love for the DCHP to work as it should on the MBPs like it does on everything else. Rebooting the router is not an option since I have an entire office on it. And.. it is probably not a router problem since the problem is concentrated on one type of machine.Â
Info:
MacBook Pro, Mac OS X (10.7.3)
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Oct 9, 2010
I have a wireless router with 2 devices connected via ethernet (PC and XBOX 360) and 3 devices connected wirelessley (Imac, macbook, iphone and printer). This morning I was using my imac and all of a sudden I got a message saying another device is using my IP address.
I tried restarting the router, the computer airport but nothing worked. The only other device on at this point was the macbook which received the same message. I assigned a manual address to the imac via the advanced settings in airport but how do I fix this so that IP addresses are assigned automatically?
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Jul 27, 2007
I have two laptops on the same network. When one of them is on, the other cannot get on because of this IP conflict, and vice versa. How do I change one of the IP addresses so I can get both laptops on the network at the same time? I'm looking to transfer music between two laptops and because they both can't connect to the network at the same time (Mac and PC), I can't transfer the files.
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Nov 13, 2009
I have a MB and MBP and they both have the same IP address, so the MBP won't work on our wireless network anymore.
How can I cahnge the IP address? We have a netgear router and are with Jersey Telecoms.
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Aug 23, 2014
find my MacBook Pro retina has crashed during the night... I know have iCould and Facebook login windows popping up alternatively but I am unable to cancel them.  Since I use neither services , I do not wish to enter the passwords yet I can not get rid of the windows... As far as I know its a virus/trojan I'm not familiar enough with mac os x to find out what might be causing this or how to stop these windows from popping up without entering the information
Info:
MacBook Pro with Retina display, OS X Mavericks (10.9.4)
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Mar 28, 2012
Okay. So my Airport has decided that I apparently have no IP address. I know this is somehow my fault, and I've tried resetting it via terminal, but each time I fix it, I have internet connection for about 5 minutes and then it cuts out again. I've looked under my network settings and there's absolutely no IP address. Nothing. I set up one of the Google servers (8.8.8.8), but that is only getting me so far. I just don't know what to do next. I'm running Lion, because I know that will make a difference in how everything is set up. I have also tried to release a new one via DHCP, but that doesn't do anything when I try it.
Info:
MacBook Pro, Mac OS X (10.7.3)
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Dec 16, 2009
has an "!" over wireless display. When I go to network settings it says... "AirPort has the self-assigned IP address 169.254.20.213 and will not be able to connect to the Internet."it is happening on both my new macbookpros one is a 17' one is a 13"
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May 7, 2012
airport connected but has no IP address and no iternet connection
Info:
MacBook
Pro, Mac OS X (10.7.3)
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Sep 24, 2009
Girlfriend just got a new iMac all in one a week or so ago. We had no problem setting this up on the exsisiting network but a couple days ago we began having issues. The 3 PCs, 2 iPods and one network printer seem to connect fine until the iMac connects (or tries to). We've gotten IP confilct errors on various machines (assigning already assigned IP address). I cannot even connect to the router when the iMac causes this problem. Take the Mac off, everything runs fine. I am new to the Mac world so maybe I'm missing something. Here's what my network consists of... Scientific Atlantic DPC2203C cable modem (Optimum) Netgear WGT624 v3 router 1 iMac all in one, 2 HP and one Gateway PC(all Vista), 2 iPod touch, 1 HP wireless printer all running DHCP and wireless.
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Nov 14, 2009
My son recently moved to Taiwan and is staying with friends. The apartment has a d-link router. My son has a MacBook Pro, his room-mate has a Windows computer, both connect to the d-link router using Ethernet.A conflict has erupted. I hope you can offer some advice and prevent bloodshed.My son gets up, turns on the router and connects to the internet. A while later, the room-mate gets up and can't connect. The room-mate insists that the Mac is causing him to not be able to connect. Tempers flare etc. and it's seems impossible to do any meaningful troubleshooting.The room-mate insists that the problem only started with my son's arrival. Also, the room-mate is concerned that viruses are getting into his computer because of the Mac being connected.
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Sep 2, 2008
Development of Apple's upcoming Mac OS X 10.5.5 Update appears to be winding down, with only a couple of new fixes making their way into recent builds, including one aimed at wireless issues.
This past week saw two new pre-release distributions of the 320MB Leopard update fall into developers' hands. The first arrived mid week as Mac OS X 10.5.5 build 9F25, but contained no noticeable changes from the build the preceded it.
More recently, developers were treated to build 9F29. That build tacked on a pair of fixes, one of which tackles an issue between Macs and previously joined AirPort networks, people familiar with the software say. The second fix was related to a graphics framework.
Seemingly at the tail end of its development cycle, Mac OS X 10.5.5 is reportedly hindered by a single known bug that prevents emails from being searched properly in Apple's Mail application.
The fifth maintenance and security update for Mac OS X 10.5 Leopard now stands to deliver 125 bug fixes when it's released later this month.[ View this article at AppleInsider.com ]
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Nov 21, 2009
Well the problem started when we got a new Time Capsule (2 TB) and replaced and AEBS. At the moment we have 4 macs using the TC. Three wireless and one connected with ethernet cable. If I close the lid on my Macbook Air and open it after a few minutes, it wont connect to the internet. I get a message saying: "Airport has the self-assigned IP address (and the IP #) and will not be able to connect to the internet" I try to use the network diagnostics, and it looks like the network settings is wrong (amber light) and the internet and server is failed.
I then select the network I want to use, and then it suddenly works again. Also three of the macs are using the TC for back ups. Usually the back up gets delayed, and wont start even if I ask it to back up now. It starts to the volume ready, then it says that the disk isn't available. Is there something I cant do or is the TC faulty? My mum and dad arent too good with macs, so if they cant connect to the internet they usually just reboot and it works. I have reset the TC and created the network again, but its still the same issue.
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Aug 25, 2010
I know this problem has probably been discussed and I've searched but have not been able to find good information. Main computer still running 10.4.11, MBPro running 10.5.8.
I'm a retired graphic designer, only now doing pro bono work, so not completely up to date.
Since leopard and snow leopard there are a number of font problems. Type 1 Helvetica Neue has been a standard of mine for 20 years. Likewise, Adobe Garamond Extra glyphs are in thousands of my files.
10.5.8 AGE characters do not show up. I installed 10.6 and they still don't show up. Any way to fix?
Also, any way to fix the Type 1 Helvetica Neue/ Snow Leopard conflict?
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Mar 9, 2010
it seems that both Time Capsule and Leopard Server both use port 548 for file sharing. So if I have both the server and Time Capsule with File Sharing turned on, any attempt to login will go to the Time Capsule and not to the server.
If I turn File Sharing OFF in Time Capsule, I can than map port 548 to the IP of the server machine and users can properly login into the server again.
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Oct 3, 2010
Recently moved and had a net connection installed yesterday, the guy set it up and it connected fine up until last night when i decided to mess around with OSC control and had to set up my own local network to do it.
Now today I'm trying to connect to the net again back on the default 'automatic' location (i made a seperate location for the OSC to try and avoid this sort of trouble) - and although Airport is picking up the router and is saying it HAS got an IP address, the internet is still not connecting.
I've done a few common sense diagnostic checks, its not Firefox becuase I'm running Little Snitch and thats not showing any movement either..I checked that its automatically configuring using DCHP and supposedly wiped the network settings by deleting the .plist files but its still doing the same thing: reporting that it's connected and has an IP address, but still with no connectivity.
Diagnostics says it 'appears to be connected' but the Network Setup Assistant gets to the last stage of the setup and asks me to check my diagnostics because it can't connect. When seconds later it has an IP and is 'connected'.
OSX 10.5.8
Router is a Netgear VMDG280
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Mar 27, 2009
About a week ago my internet connection would drop out for hours. After setting messing around with my router and modem and reseting everything it would work for a few hours then stop again. My connection is provided by Charter Cable, through a Linksys BEFCMU10 V4.0 modem, to a Linksys WRT55AG V2.0 router. If I removed the router and wired directly into the G5 from the modem, the internet connection would start working perfectly. If I went back, reset the router and hooked it up again, I would lose connection and it would actually take the modem completely offline, requiring the modem to be reset to get reconnected. So I decided I would spring for an Airport Extreme Base Station, figuring the router was bad.
Well I get home with the new AEBS hook it up, and does the same thing. Apples menus and troubleshooting guides. (The main reason I decided to get the AEBS) Well after going through the setup, it says it is not receiving an IP address.
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Aug 15, 2009
I have a MacBookPro running OSX 10.5.8 and I've been connecting wirelessly with my NETGEAR Wireless N Router (WNR2000) for the past week but then all of a sudden I'm not able to connect to the internet anymore. I keep getting this message "you have a self assigned IP Address but may not be able to connect to the internet."
I've done all the basic troubleshooting with resetting the Router to factory setting and also unplugged and restarted my modem and Router and laptop.
I've called my ISP (Time Warner Cable) and they've gone through the same troubleshooting with me. I know my internet works as I've been using Ethernet and it works. The person over at Time Warner and she said that my internet and even Netgear wireless router is giving the right IP address but when i checked my network settings on my computer, the IPv4 address is this: 169.254.52.45.
I've checked on various sites and i found that IP that starts with 169.254.xxx is the default setting for airports. I don't know how to set the right IP on my airport on my laptop? It's annoying because I've tried setting my airport on my laptop USING DHCP with manual address with the correct IP from my ethernet connection but doesn't seem to work. I'm at the end of the ropes before smashing my router and computer to a million pieces.
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Aug 28, 2010
My Airport Extreme isn't recognizing the IP address from my cable modem. When the modem is connected directly to my MBP the internet works fine. When connected to the router I don't get any internet. I have powered off the modem and router and all devices, brought up the modem first (waited for all lights to come on), powered up the router, then the devices. Still nothing. I've tried deleting the DNS server information and resetting - nothing seems to work. There is a green light on the ethernet port on the Time Capsule so I believe the port is fine.
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Apr 20, 2007
I have a problem with my macbookpro and connection to internet.
1 week ago my computer as stopped to connect to internet.
I was used connecting with my airport express, but at one point my macbook pro stopped receiving ip adress from interenet.
the message on the network connection is Airport is connected to the network. Airport is does not have an IP address and Cannot connect to the internet
I have try everything...:
the Airport is working becouse all the others computers inside on my office are working well with airport.
If I connect my computer with a cable I have the same problem.
I have reset and restart Airport and computer.
I have let my connection and computer disconnected and switched off for 24 our.
I have verifyining that is not an hardware problem because I have installed a fresh OS on an external drive and when I boot from the external drive everything working well.
The OS is on boot installation 10.4.9
the machine is a Mac book pro 17 2.16 GHZ intel core duo with 2gb 667 Mhz.
My problem is that on the old installation I have a lot of software installed and will be take a lot of time doing all the new installation. I wondering if there is a way to recover the situation.
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Jan 9, 2008
iBook G4 shows that the airport has full connectivity (full bars) yet it doesn't connect and states that there is no IP address. The iBook connects using its internal airport to a Netgear Router. There is a PC that runs windows that is connected to the cable modem. For a month or so both computers were able to access the internet simultaneously. All of a sudden the computers are unable to access the internet at the same time. When I attempt to connect at the same time my Mac gives me an error stating that another IP is in use and so I can't connect.
How can I give my iBook an IP address so that both computers can be online at the same time?
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Mar 12, 2008
is it possible to change the MAC address on the airport express ? most routers allow the address to be modified over the admin panel but I can't find a way to do it with the airport.
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Feb 12, 2009
I'm trying to keep track of wireless clients joining my network. The AirPort Utility "Logs and Statistics" button (under Advanced) allows me to see what DHCP leases are out and a list of wireless clients. But it's very annoying reading a long string of Hex to know which device it is!
Is there some way to assign a name or label to each MAC address within the Airport Utility? And Yes, I could use pen & paper, but what's the fun in that?
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Jul 13, 2009
i am trying to extend a network with an airport express but the airport express cannot get a valid IP address and flashes amber.
my setup is as follows: netgear router/modem which handles PPPoE connected via ethernet to time capsule which handles the wireless network.
time capsule is working fine and has a valid IP address but airport express doesn't.
i have checked 'allow this network to be extended' on the TC, and connection sharing is in bridge mode.
i wonder if someone could help me troubleshoot this
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Apr 23, 2012
I am having problems connecting my mac with the wifi ... this is the msg tht appears on my network - status On AirPort has the self-assigned IP address (***.***.*** )and will not be able to connect to the Internet.
Info:
MacBook Pro, Mac OS X (10.6.8)
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Jun 7, 2006
I am a comitted Mac switcher trying to put my lovely new MacBook onto the office Windows network. I can connect to the office wireless network (WEP key etc) and the little radar Icon in the menu bar lights up. However, I cannot get the MacBook to obtain an IP address via DHCP. I just keep getting the default self assigned address (169.....).
However, when I connect to the network via a cable using the built in ethernet connector, I get the DHCP address just fine and everything works OK.Also, if I assign an IP address manually to the wireless card (checking it is a free address!) it accepts the settings but I cannot network, not even a basic ping of another machine on the local internal network (all our internal machines are using 10.0.0.x addresses and 255.255.255.0 sub net)The DHCP server is not in the wirless router but is a Windows server machine.This is driving me crazy. I have called Apple care and they just dont want to know because there is a Windows machine in the mix. I expected better from them,
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Apr 22, 2009
I just installed my new airport extreme base station.
I want to set it up for Mac Address filtering. Can this be done? I only see where it can be set to allow certain times only.
I want to set it like my old D-Link router where only the Mac Addresses listed are allowed on the network, even if the network password is correctly entered.
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Feb 9, 2010
I'm trying to add a new MAC address to the access list of a AirPort Extreme Base Station.
For whatever reason, it won't accept it. When I finish entering the address, the add button is grayed out. If I try other valid addresses, it works fine. For some reason, something about this address won't allow me to add it.
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Feb 28, 2010
For some reason I have to install some applications via MacPort, such like ImageMagick, however, I saw other applications(e.g. vi, vim, etc) also available via macport, there are already built-in programs like vi, if I install something via macport which are already built-in, will there be any problem or the newer ones just overwrite old ones?
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Sep 11, 2014
Just bought a new Airport Time Capsule 3TB for backup purposes and to use as the main router in my home (model number A1470 the latest tall one). I was originally using an AirPort Extreme (model number 1408 approx 6" square and 1' tall) for my main router. Â
I got the TC setup and putting out good wifi signal, but would like to take my Extreme and extend it off the TC to boost signal in other parts of my house, but having some difficulty. I searched the forums and found setup instructions to do this, but I get a message saying, "unexpected error. Try again." Well, tried again and still no luck.Â
Info:
Airport Extreme
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Jul 6, 2012
Im abel to be connected to airport sometimes but then my airport stops working completly. the airport symbol is blank ( white) and when i hover over it it says its not installed.
Info:
MacBook
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