R7800 (Voxel) - router to router (LAN to WAN) connection

[Nickat1]

Hi, I've been running an R7800 (Voxel) for 5 months without issue. In the last week I've had issues with my Youview boxes freezing and then as IPC 6023 error on my subscription channels. I've tried various things, but the only thing that seems to work so far is to put the BT Homehub5 back in place as the primary router. I wanted to set it up as HH5 LAN to R7800 WAN, so that I can keep all of my network, except for the YV boxes, on the R7800 and use DHCP, but I can't get it to work. I've tried both DHCP and STATIC ip's for the WAN port (Internet tab in the R7800 GUI), but a PC patched in to the R7800 can't see the HH5.

The setup at the moment is ISP->HH5-> (LAN to LAN) ->R7800->JGS524 un-manage switch. It works, but I can't use DHCP.

Any idea please if the LAN to WAN should work with the R7800?

Thanks, Nick.