We have two isps (Virgin and BT) and both hubs have been tested independently and work as advertised.
However, the point of having two isps is that, in the event of one going down, we still have a service.
Hence they are both connected to a Netgear ProSafe Bonding Router. (which, when it's working properly also bonds the services and allows us to approximately double our broadband speed in certain use cases)
My problem is that the router recognises the Virgin Hub, no problem. But does not recognise the BT Hub and this the admin screen is telling me that WAN 2 (the BT hub) is down, when it isn't.
I thought I'd cracked it when I realised that the default ip address of the BT hub was 192.168.1.254 which was already occupied by a Novell Server. So I changed the hub address to .200. Forced the router to refresh its search for hubs. Nada.