Hi，@Simon_Smith 

Based on your description, I recommend you to check the long Ethernet cable, ensure that runs from your house to your shed is not damaged and is securely plugged on both ends. You can also test with another device to confirm that you can obtain an IP address when connected directly to the Ethernet cable in the shed, or you can use another Ethernet cable to test whether clients can get IP address successfully from your EAP115.

The most common reason for IP configuration failure is issues with DHCP (the process by which devices are assigned IP addresses), ensure your router is set up to be the DHCP server and has a sufficient address pool for all connected devices.And ensure that your EAP115 is set to the "DHCP Client" mode if it is not meant to assign IP addresses, if it's set up as a DHCP server, it might be causing conflicts with your main router's IP.

  @KyrieM - thanks for your reply and things to check. I can't even connect to the internet even when plugging the ethernet cable directly into my laptop rather than through the EAP device first, so I guess it is a problem with the cable running from the house. This is a real pain but I guess I know where to look, thanks :)