ZxZDeViLZxZ
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Q: iOS7 Not Release Old IP Address

I have noticed on our network we are having issues with iOS7 Devices retaining old IP Addresses. It looks like It is consistant across multiple devices (4S, iPad2, &5S) they are keeping their ip addresses from home of 192.168.1.xxx and only pick up the new IP for Work of 10.xxx.xxx.xxx after manually renewing the IP Address. I have been able to track is down to just a few devices and am not sure why only these ones are affected and not all of the iOS7 Devices are being affected. The wireless AP They are connecting to when this problem occurs is a MikroTik RB SXT G-2HnD. There is nothing on the network that would be giving out a 192.168.1.xxx ip address. This is making me wonder if they are retaining them from their home networks. 

 

This looks like it is affecting their abilty to accesses anything behind our vpn to our remote business system since it is not an approved ip address on our routing hardware. it is not affecting their ability to conduct regular internet traffic. The 192.168.1.xxx addresses these devices are showing are different and not in sequntial order with the other ones so i doubt there is something somewhere on the network dishing out the ip addresses.

iPhone 5s, iOS 7.0.4

Posted on Nov 27, 2013 6:50 AM

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Q: iOS7 Not Release Old IP Address

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  • by sterling r,

    sterling r sterling r Nov 29, 2013 7:19 AM in response to ZxZDeViLZxZ
    Community Specialists
    Nov 29, 2013 7:19 AM in response to ZxZDeViLZxZ

    Hey there,

     

    It sounds like you have isolated this Wi-Fi issue down to a few devices. I want to recommend the troubleshooting steps in this article to see how they help the issue:

    iOS: Troubleshooting Wi-Fi networks and connections

    http://support.apple.com/kb/ts1398

    1. Be sure you're in range of your Wi-Fi router (access point).
    2. Tap Settings > Wi-Fi and turn Wi-Fi off and on. If your Wi-Fi setting is dimmed, follow these steps.
    3. Confirm that your Wi-Fi router and cable or DSL modem are connected to power, turned on, and connected to the Internet. If not, refer to your network administrator or Internet service provider (ISP) for assistance.
    4. Restart your iOS device.
    5. Tap Settings > Wi-Fi and locate the Wi-Fi network to which you're connected.
    6. Tap TS1398_i.png and Forget this Network.
    7. Try to connect to your desired Wi-Fi network.
      Note: You may need to enter your Wi-Fi password again if your network requires one.
    8. Turn your Wi-Fi router off and on2. If your ISP also provides cable or phone service, check with them before attempting this step to avoid interruption of service.
    9. Update your device to the latest version of software.
    10. Update your Wi-Fi router to the latest firmware2. For AirPort Base Stations, install updates using the AirPort Utility.

    And this section from down the bottom:

     

    Unable to automatically connect to Wi-Fi

    • Avoid giving your Wi-Fi network a common name.
      • Some wireless routers are preconfigured with a common SSID (network name) such as "wireless" or "default."
      • If your desired Wi-Fi network has a common SSID, try changing the SSID to something unique2.
    • If your desired Wi-Fi network has a unique SSID, reset network settings by tapping Settings > General > Reset > Reset Network Settings. Note: This will reset all network settings including:
      • previously connected Wi-Fi networks and passwords
      • recently used Bluetooth accessories
      • VPN and APN settings

     

    Thank you for using Apple Support Communities.

    Regards,

    Sterling