No Internet via Ethernet but ok via wifi

Hi all, Bt home hub 2.0 Firmware 8.1.H.U (type A) Vista home premium sp2 I connect my desktop to my home hub via Ethernet cable. I connect other devices to my hub via wifi. I can connect all devices, wired and wireless, to the hub ok and can get to the hub manager. It reports connectivity to broadband is ok. My wifi devices can all access the Internet ok and download data and open web pages. My desktop cannot. The network and sharing centre shows Local Only. If I reboot the pc and restart the hub, I get local + Internet for no more than a couple of minutes but then it reverts to local only. Yet still my wifi devices are ok. Have tried swapping cable to a different port on the hub. Orange and green lights showing as normal at the network port on my pc. Suspect that the trouble exists between the pc and the hub. Has anyone any ideas? Assuming it doesn't fix itself I will try digging out a different cable and also attaching another computer via Ethernet cable to see what happens. Thanks Ian

The problem you have overcome is the issue surrounding the failure of the DHCP allocation and lease renewal within the home hub. It fails to maintain the association between the MAC (hardware) address of your network adapter, and the IP address/default gateway.
Why this happens it is difficult to say. It could be related to the Vista problem mentioned on this forum on an earier posting.
http://support.microsoft.com/kb/928233/en-us
If this also applies to Windows 7, then this would explain the problem.
You will probably find that when it disconnects, you lose the default gateway of 192.168.1.254
By giving it a static IP address, DHCP plays no part in the connection.
There are some useful help pages here, for BT Broadband customers only, on my personal website.
BT Broadband customers - help with broadband, WiFi, networking, e-mail and phones.

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