Hi Dónal, This is not a permanent fix, but what happens if you change the assignment from DHCP to a static IP address? If you go to Settings > Wi-Fi and then flick right to the "more info" button for you selected network and double tap, you can read the IP Address, Subnet Mask, Router, DNS, and Search Domains under the DHCP tab. You can switch the selected tab from "DHCP" to "Static" by double tapping, and then you can enter values in all the same fields, including a valid IP address.
I'm not sure what you mean about your iPad getting a self-assigned IP -- do you meant that this is not a valid IP address even though the address seems legal? (On my Airport Express the addresses are 10.etc.) Can you manually switch to the IP address of one of your other connected devices (which you take off of that address) and have your iPad connection work? The only Wi-Fi router related iOS connection problem I've had was time-outs dropping the connection on my first device (iPod Touch in early 2010), an that only happened when I was on a WPA encrypted network and near the edge of coverage. That was because the energy saving settings on the device would drop the connection if there wasn't a fast enough response from the Wi-Fi network to indicate this was currently in use. So unless there was continuous network use, the connection would periodically just drop. If I streamed a low bit-rate radio station in the background with ooTunes that was enough to keep the network connection up (under the default DHCP setting for my encrypted home network), and then later I found that if I switched the IP settings to static and copied in the address from the DHCP assignment, that would also keep the connection up without having to stream anything in the background. What was weird was that this only happened on this one network with WPA encryption and when I was farther from the router; it wouldn't happen on any open Wi-FI network, or ones that were WEP encrypted. Eventually, there was an iOS update that fixed this, and I didn't have to use the static IP address. Changing the DNS lookup address didn't help in this case, although that work for some people. I assume you're only having this connection problem with your home Wi-Fi network, and your iPad can connect elsewhere? Cheers, Esther On Sep 11, 2012, at 3:22 AM, Dónal Fitzpatrick wrote: > Hi all, > > This is one for the networking gurus on list. I'm no expert in this so I'm > baffled. > > My wifi connectivity is handled by an Airport extreme. Most devices on the > network are connecting fine, except an iPad II which seems to connect, but is > getting a self-assigned IP (169.etc)). I've tried forgetting the network, > resetting all network preferences, restarting the router but all to no avail. > Anyone any thoughts. > > Dónal > Dónal Fitzpatrick > dfitz...@computing.dcu.ie > <--- Mac Access At Mac Access Dot Net ---> To reply to this post, please address your message to mac-access@mac-access.net You can find an archive of all messages posted to the Mac-Access forum at either the list's own dedicated web archive: <http://mail.tft-bbs.co.uk/pipermail/mac-access/index.html> or at the public Mail Archive: <http://www.mail-archive.com/mac-access@mac-access.net/>. Subscribe to the list's RSS feed from: <http://www.mail-archive.com/mac-access@mac-access.net/maillist.xml> The Mac-Access mailing list is guaranteed malware, spyware, Trojan, virus and worm-free! Please remember to update your membership options periodically by visiting the list website at: <http://mail.tft-bbs.co.uk/mailman/listinfo/mac-access/options/>
