Do setup again.. but make sure both your wireless and your ethernet have ipv6 turned on to local link.
Done this OK, but no idea about IPv6 - something new to me and rather Appley I think?
Unplug the WAN for the moment.. Just LAN port TC to the MBPr ethernet via thunderbolt.. (thunderbird was the kids puppet series.. Thunderbirds are go!!). Done - New real people Thunderbirds movie coming out soon I believe!!!
Reset the TC again.. sorry.. !! You're welcome ... done.
Make sure the ethernet now has an IP address.. 10.0.1.2 - Yep - done that - on ethernet anyway ...
You need to open the network preferences to find out. Yep - that's good ...
****** I then reconnect the TC WAN to the router - is this right?
And then I think I start going round in circles ... boot, reboot, restart, reboot again ...
The final result is green light on TC, but error message when trying TM is "Backup disk is not available".
Then open the airport utility and you should be able to setup the TC.
Do as little setup as possible and then run the TM backup and see how it goes.
I have managed to get Thunderbird to LAN on TC to create a folder on TC and copy a file onto it.
So I guess the drive is working - it must be the software, settings or perhaps even the operator that isn't quite so clever ...
I named network RFG, named device RFGTC. RFG network shown as IP 192.168.0.72
Wireless router is BT Homehub 3 with IP of 192.168.0.254 - is this issuing new IP addresses when rebooting TC?
I have three wireless networks here - the BT Homehub3 wireless, the TC wireless, and also a D-link power socket ethernet thingy for an ethernet connection to the telly - DHP-W310AV which is also wireless link. All are effectively connected to the BT Homehub - is there a conflict there?
Have several times achieved in Airport Utility schematic with internet shown as green, RFGTC shown as green, light on TC green, but no TM backup run ... "backup disc not available."
And there are no tall building around here to hurl myself off ... at least you can go to Sydney Harbour bridge - not too far away ... it was my son in Sydney that persuaded me to scrap Windows and go Apple ... it's all his fault ...