I have 2811 with 8.6, also i have 9971(setup according to instructions). It can't register. Sometimes it registering and i can even call, but then it disconnects. In status, i see: ethernet disconnected,configuring ip.
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...