I have now changed the ethernet cable and also assigned static network details.
I cannot run the traceroute test via the gui, however, when i login via SSH and run a traceroute to any address it returns all hops fine. The gui just comes back with "Ajeax Error".
I have re flashed with the 600M firmware. Same issue.
Basically, from command line, all networking seems fine.
Will see how it goes moving forward. Ill keep you all in the loop.