IP Conflicts between Ethernet-connected Mac and wireless devices

I have three wireless devices accessing the internet via my Airport Express connected to an XRouter Pro distributing internet services from my cable modem. I also have a Mac Pro tower connected to the XRouter via Ethernet. Until I installed Snow Leopard, this set-up worked seamlessly with DHCP. Now, when I power on my Mac Pro, it tells me another device is using its IP address, rather than just picking up a new one dynamically. Once the Mac Pro has its address (which generally means turning off whatever device is using the Mac Pro's desired address), it works fine, but until then, it wreaks havoc with all the other connections. Any idea as to how I can keep this from recurring? I don't want to have to leave my Mac Pro running all the time just to avoid IP conflicts.

ColPanik wrote:
I have three wireless devices accessing the internet via my Airport Express connected to an XRouter Pro distributing internet services from my cable modem. I also have a Mac Pro tower connected to the XRouter via Ethernet. Until I installed Snow Leopard, this set-up worked seamlessly with DHCP. Now, when I power on my Mac Pro, it tells me another device is using its IP address, rather than just picking up a new one dynamically. Once the Mac Pro has its address (which generally means turning off whatever device is using the Mac Pro's desired address), it works fine, but until then, it wreaks havoc with all the other connections. Any idea as to how I can keep this from recurring?
Is the "XRouter" box supplying IP addresses via DHCP? Is the AirPort Express in "bridge mode" or is it also supplying DHCP services? In general, it's not a good idea to have two DHCP servers running on the same subnet.
I'd guess that your Mac Pro actually is "picking up a new [IP address] dynamically," it's just that some other device happens to be using it already.

Similar Messages

  • Beginner question: Can I create a hybrid home network between an ethernet-connected iMac and an airport connected Macbook Pro using a hybrid router?

    I recently acquired an friend's used iMac, I don't know anything about networks and all I can find is how to create a Wi-Fi home network but nothing about hybrid Ethernet/Wi-Fi networks.
    I have the iMac connected via Ethernet to the wireless router.
    I connect via Airport with my MacBook Pro
    I would appreciate if anyone has any pointers as to how I can start setting up a network between my ethernet-connected iMac and WiFi connected Macbook.
    Thanks!

    ethernet and airport/WiFi are just transmission media for the same network. If you can get internet on both computers, they are networked. Using the same router = same network.
    So now, what is it you want to do? Share files between them?
    http://support.apple.com/kb/ht1549
    http://gigaom.com/2008/09/26/mac-101-sharing-files-between-2-macs/
    http://apple.stackexchange.com/questions/62450/how-to-share-files-between-two-ma cs-at-home

  • I have forgotten my Password to be able to connect between my desktop Mac and Mac Book on my home network. How can I recover the password or change it?

    I have forgotten my Password to be able to connect between my desktop Mac and Mac Book on my home network. How can I recover the password or change it?

    The password used to log in to a user account remotely is the same as you would use to log into it locally. You can also use your Apple ID, so try that.
    To change your login password read OS X Mavericks: Reset a login password
    also OS X Mavericks: If you forget your login password

  • Connecting macs and pcs together through airport express

    i have had my first mac ibook for just over a week and have also bought an airport express thingy. my daughter has a windows pc laptop. is it possible to connect them both through the airport express so we have a wireless connection to each? i am pretty new to the whole apple mac and wireless business and dont understand about settings and putting codewords and numbers into the boxes that might pop up.
    anne

    Hi Anne,
    Welcome to Apple Discussions
    By connecting them you mean to have them both receive signal from the Airport Express to access the internet rather then make a connection for file sharing.
    If that is the question, Yes you can. The easiest way of doing this is to set it up on the iBook G4 using Airport Setup Assistant. It will walk you, or your daughter through setting up the Airport Express. You want to assign it a password and your basically done except for your Windows PC. Does your Windows PC have a wireless card? Can you access the internet already? What you are going to need to do in order to connect to it is to join the network like you would any wireless network. I am not a Windows user (I try not to use them as much as possible), so I can't really help you with the Windows aspect of it.
    You can also setup the Airport Express using your Windows PC, but I think it would be easier on the Mac.
    You may want to look at the following...
    Knowledge Base Document #166609, which will help you decide What kind of network do I want to setup (Mac)
    Knowledge Base Document #163112, which will help you decide What kind of network do I want to setup (Win)
    Knowledge Base Document #163103 on Setting up your AirPort Express or AirPort Extreme Base Station (Mac/Win)
    Knowledge Base Document #106424 titled AirPort: Joining an encrypted wireless network
    Connecting to the Internet using AirPort
    Knowledge Base Document #108058 on Choosing a password for networks that use Wired Equivalent Privacy (WEP)
    Jon
    Macbook 2.0 White (100Gb HD 2Gb RAM) Mac Mini 1.42Ghz, iPod (All), Airport (Graphite & Express), G4 1.33Ghz iBook, G4 iMac 1Ghz, G3 500Mhz, iBook iMac 233Mhz, eMate, Power Mac 5400 LC, PowerBook 540c, Macintosh 128K, Apple //e, Apple //, and some more...  Mac OS X (10.4.5) Moto Razr, iLife '06, SmartDisk 160Gb, Apple BT Mouse, Sight..

  • I have an Iphone 4s and i can't make a connection to my mac and other devices via bluetooth! Why is this a problem and how can i repair it?

    I have an Iphone 4s and i can't make a connection to my mac and other devices via bluetooth! Why is this a problem and how can i repair it?

    "I have an Iphone 4s and i can't make a connection to my mac and other devices via bluetooth! ":
    That is correct.
    "Why is this a problem and how can i repair it?"
    Becasue this has never been a feature of iphone/ipod/ipad.  There is nothing to repair.

  • Conflict between refeneces in Lightswitch\ and Silverlight\ after update to Visual Studio 2013 12.0.40302.00 and SQL Server Data Tools 12.0.50226.0

    After updating VS and SSDT there began a conflict with references in two directories under the SDKs folder (Lightswitch and Silverlight):
    Error 91
    The type 'System.Data.Services.Client.DataServiceCollection<T>' exists in both '
    ...\Microsoft SDKs\LightSwitch\v4.5\Client\Microsoft.Data.Services.Client.SL.dll' and 'both '
    ...\Microsoft SDKs\Silverlight\v5.0\Libraries\Client\System.Data.Services.Client.dll'
    ...\SPDCDataObjectContext.cs 1478
    52 Spac.DesktopClient
    I thought since the Lightswitch directory was newer that I would comment out the Silverlight directory and see how far that would get me. Now I get:
    Error 16
    The type or namespace name 'Composition' does not exist in the namespace 'System.ComponentModel' (are you missing an assembly reference?)
    ...\Spac.DesktopClient\GeneratedArtifacts\ApplicationGenerated.cs
    13 36
    Spac.DesktopClient
    How do I handle the original conflict between refeneces in Lightswitch\ and Silverlight\ ?
    Scott Mitchell

    Thank you. Yes that resolves the conflict but leaves some missing references like the "Composition"
    reference above. I was able to get past that by adding System.ComponentModel.Composition. This is after installing the VS 2013 update 4 build.
    Now I get the following. I'm concerned that I'm taking references from both Lightswitch and Silverlight
    sdk's just to get it to build. These references are required because of the auto generated code. I must have something quirked. Anyway what about System.Data.Common.DbConnection? How can I get it without
    referencing System.Data?
    Error 2
    The type 'System.Data.Common.DbConnection' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
    C:\Source\splat\Splat.Spac\Spac\Spac.Server\GeneratedArtifacts\ApplicationDataObjectContext.cs
    50 16
    Spac.Server
    Scott Mitchell

  • Internet Connection - Your Apple wireless device does not have a valid IP.

    I just bought an Apple TimeCapsule and set it up normally, following instructions to my Arris cable network on the Videotron provider here in Quebec, Canada. The TimeCapsule did appear as a wireless device on my MacBook Pro (after updating the AirPort software from the provided CD - as was instructed). I went through the whole installation process to obtain at the end this error:
    Internet Connection - Your Apple wireless device does not have a valid IP.
    The only provided instructions were to check the cable and then contact your Internet provider. Well it seems clear to me that if I contact my provider and say that the internet connection works fine directly on my computer, also fine through my "normal" wireless router but not with my new TimeCapsule, I won't get much of a response.
    After a lot of research, a friend indicated the solution in my case.
    You have to really reset the cable modem to convince it to start giving out IPs again.
    To do this:
    1. Unplug your TimeCapsule (possibly you might have to reset to factory defaults - see the documentation)
    2. Unplug your cable modem
    3. Reset your cable modem by pressing the reset button with a pen (or something) for several seconds.
    4. Plug your cable modem back in and let it reboot/restart - until the lights are back on.
    5. Plug in your TimeCapsule
    Everything should now work and you can restart your AirPort set-up on your Mac.
    Good luck!

    My ISP is AOL.  The service is DSL via a broadband modem.  Somewhere during the setup process there appears to be a communicatiosn issue between the Airport Extreme Base Station and the DSL modem.  When I hook the DSL modem directly to my iMac I can connect to the internet without any issues. 
    I tried the factory reset and the DSL modem reboot process described in other posts and seemed very close to success...until the internet setup step.  That is where this issue first presented itself.

  • Itunes and wireless devices no longer show up in upper right corner of itunes window

    Help! My Internet service was interupted last week and when it returned my iTunes and wireless devices no longer show up in upper right corner of the iTunes window.  I finally figured out how to get both of my wireless devices to show up on the left hand column under devices, but nothing else shows up now in the upper right corner!  I cannot for the life of me figure this one out and the tech manual is not helping at all.  Help!

    If you have the left-hand sidebar showing then that is where the store and your devices will show can be selected - if you press option-command-S if you are using a Mac, control-S on a PC, then the sidebar should be hidden and the store and device should go back to the top right. Is that what you mean ?

  • I use the airport modem for my computer and wireless devices. I can't access with my iphone. It won't take my passcode. This passcode works with some of my wireless devices but not others. Can you help me?

    I use the Airport Extreme modem for my computer and wireless devices. I can't access my iphone 4 and 4S. It does not accept my passcode. My wireless laptop and wireless tower computer does accept the password. Can you help me?

    You really have an iPhone question here.
    Start with the Troubleshooting Guide for iOS devices:
    http://support.apple.com/kb/TS1398
    Post in the correct iPhone support area if you need more assistance.
    Using iPhone

  • WRT110 Can't connect MAC and PC to wireless network at the same time.

    I installed a WRT110 router on my son-in-law's MAC sometime back and at the time configured it to have the MAC connected via Ethernet.  My PC laptop worked fine with it in the wireless mode.  Recently we changed the MAC to wireless newtworking and removed the Ehthernet connection.  Now if the MAC connects to the wireless network first and then I attempt to connect with my PC laptop the PC cannot find the network and the MAC loses connection.  If I shut my PC down the MAC will not find the network until it is put to sleep and reawakened.  If the MAC is put to sleep my PC wil immediately find the network. If I first connect my PC and then awaken the MAC both work fine.  I've checked all of the router's setup settings and they seem to be OK.  I am not MAC savvy and my son-in-law is a neophyte at computers so we are really helpless when something doesn't work.  Help will be appreciated. 

    I tried this setup change after reading another similar post.  It didn't help.  One thing I had wrong in the first post is that neither computer will connect to the wireless net after we experience the wireless failures until both are turned off, at least that is what happened after making the suggested changes.  Is this a WRT110 issue?  Seems there are quite a few posts similar to mine. 
    Bo2

  • Connected Mac and PC to Airport Extreme

    I have an Airport Extreme and a cable modem/internet connection. I have the Airport set up via Ethernet to the cable modem and my iMac(my Mac is old and does not have an airport or wireless card), but the PC will not connect or get an IP address from the Extreme if I put security on the wireless network. I have found guides that tell you you need to get the full hexadecimal key to enter into the PC as the password but am unable to find it on my Mac.
    Please help.

    2- I tried just connecting an ethernet cable directly between my Mac and PC and set up static IP on both but for some reason it does not work, but it works fine via the router, could this be because direct connection requires a crossover ethernet cable ?
    How old is the PC and does it use gigabit.. with gigabit you do not need crossover cables.
    However the two computers can get confused about negotiated speeds.. so set exact speed on each computer.
    Set both to gigabit. Full duplex and see how that goes.. assuming a good quality it cable it should work.
    If the max speed of the PC is 100mbit then reduce the speed in the Mac to the same.
    If you do this kind of setup you also need to set static IP in the correct range .. but you need to NOT set gateway and DNS in the PC.. in the Mac on the other hand I have found they tend to like the gateway and DNS set.. but you use the same one as the airport extreme uses.
    1- Is there any latency added when computers are communicating to each other, in my case a Mac and PC, via the airport extreme ?
    No, the latency on ethernet networks is tiny.. and transfer speeds on gigabit are identical .. using the router is much easier than messing about with direct cable connections.

  • Connecting Mac and PC to Airport Extreme

    Trying to migrate some files from a PC to a Macbook and am having trouble. After many failed attempts, it seems to me the best way is to connect both the PC and the Mac directly to the Airport Extreme. I am asking if this is possible, will it work to move the files from the PC to the Mac and how to set it up correctly? Below are details on setup now, problems and various solutions, although just showing me how to attach both a PC and a Macbook to the Airport Extreme, is my primary need now.
    NOW - The PC connects directly with Ethernet Cable to Airport Extreme. Airport Extreme connects directly to the ISP provided Cable Modem. The PC also connects directly to a Printer with a printer cable.
    The Mac connects by Wireless to Airport Extreme (and Internet) and to to the Printer.
    This arrangement is a result of the PC, more or less, falling apart. The PC wireless connection usually will not connect or fails, therefore I opted to use the Ethernet connection. By necessity, a D-Link is used in place of the two broken USB connections on the PC. Due to condition of PC, I prefer to leave everything as it is since it's working so far.
    POSSIBLE OPTIONS - When I looked at various ways to move the files from PC to Mac, it seemed best to use an external hard drive, but I've not tried that yet since I am not sure how to change the drive's PC format to the Mac format without losing, in the process, all the files copied from the PC. I bought a new external drive that is supposed to work on a PC or a Mac, except that, with this PC,there is no assurance the drive will work. Two others I used as backup drives no longer can be found by the PC.
    I tried to set up a network with the PC and Mac, but never succeeded.
    Also, tried the file sharing instructions and never succeeded in that. In both cases the Mac just did not show up on the PC network places, nor does the PC show up on the Mac, despite my following instructions as well as I could.
    That is why I would like to take what seems to use a more direct route to get the files I want from the PC to the Macbook.
    Thanks in advance for any help you can provide.
    Don

    Please check out this excellent article by iFelix on sharing files between PCs & Macs: Sharing files between a Windows XP PC and a Mac running OS 10.4.x

  • Using a wire connected mac as wireless base-station by using airport extreme card

    Is it possible to use a mac as wireless"base-station" for a iPhone by using an airport extreme card , if the mac is connected only by wire?
    I created a network on my mac and my iPhone is connected to it, but it says the network is not connected to internet.
    So can I connect the airport extreme card on my mac to the ethernet of my mac by changing the network settings on my mac?
    If not, is there another way?

    ok, i got the answer from another discussion. http://computers.tutsplus.com/tutorials/how-to-share-your-macs-internet-connecti on--mac-60309

  • Connecting Mac and PC

    HELP!! I want to connect my Power Mac G4 and my Dell PC to one Apple Display and one Apple Keyboard. Is this Possible? Do I need a KVM (?) switch to switch between the two? Help? I would also like to set them up to a wireless modem. What do I need and how do I do this? Please help in plain language. I really don't know much about computers. THANKS!

    Hi,
    Yes, you do need a KVM. However, which KVM you need depends on which Apple monitor you have, and what the dell can output. If you refer to this article here - http://docs.info.apple.com/article.html?artnum=58692 - which of the ports is used to plug the monitor into the Mac and which one does the Dell have? Which Apple display is it? Is it a flat panel or is it a CRT?
    Pause and remember this, since things do get technical from here on.. it's not very simple, unfortunately. This assumes you have an Apple LCD display, and not one of the earlier Apple CRTs.
    If the Apple display uses ADC, you will need to get a DVI to ADC converter, unless it's the clear CRT with ADC, in which case you need to get a new monitor - nothing that does ADC supports that model.
    If the Dell only does VGA, you should get a new video card - most DVI switchers only do digital video, and a new video card with DVI will likely be cheaper than getting a KVM which does both.
    You'd looking at about $200 for the DVI KVM (from here - http://www.kvm-switches-online.com/ext-dvikvm-241.html ) and about $99 each for either the ADC to DVI converter, or a new video card for your Dell.
    Please respond with any more information you have with your setup, and I may be able to answer it with a lot fewer "if's" and "buts".

  • Sync error between mail on .mac and on mail

    I just got an iPod Touch, and when I connect it the sync program starts. The only issue I have is a conflict between my email accounts on .mac and mail. I have selected the one I want to use for the correct account information, but it does not save the information (regardless which one I choose). When I try to change the mail account on my computer the changes don't save. I assumed the settings would transfer to .mac, but apparently not and I can't find where to make the changes. Thanks.

    iSync is only for syncing Contacts and Calendars to non-Apple mobile phones. You'd be better off asking in the MobileMe iPod touch Mail forums here:
    http://discussions.apple.com/forum.jspa?forumID=1198

Maybe you are looking for