The modem Mfr is Orange (France) and the modem info is on this link:

http://cdn.woopic.com/v1/AUTH_c10f167280f2414abb346a5347e1ecd9/prod/binaries/files/827753_21161607_2_Guide_Livebox5_Ed1.2a.pdf

But here is an update, and I'll try to be brief.

- After the lost connection and pink light on the NG today, instead of doing a reboot all around, I simply plugged in my Mac back to the modem (it wasn't on the network when the disconnect occurred): the NG reconnected! Pink light stopped, internet connection re-established between NG and modem. Weird.

- So I met with a network tech from my work later today. We are suspecting that it may be after all how the NG interacts with the modem (remember, the firmware update had no impact it seems).

- For reasons I have explained above, I need to attach my Mac to the Modem and the NG to the modem, although the NG is the main router for the house (and the only source of Wifi).

So, what we have tried first:

1. assigned on my modem a static IP, one for the Mac and one for the NG

2. reduced the First/Last IP range of my modem (not sure why but he recommended this)

Will see if this works/helps, simply locking in the IPs of the two hard connected devices to the modem (Mac and NG)

So, the IP chain looks something like this now:

- my ISP gives me a fixed public IP (perhaps unusual for ISPs?, but Orange does this in France)

- my modem has of course a gateway (local) IP address (192.168...X) and now a more limited IP range it offers, one of which goes to my NG and one to my Mac.

- my NG has now this fixed local IP address from the modem (192.168...Z)

- my NG assigns all local (LAN) IP addresses to every device in the house (including one of course to the Mac when the Mac is on wifi, which normally works fine in the MacOS world), and these are in the order 10.0.0.X.

The tech said we should start with this and see if this keeps things more stable between modem and NG. Will see.

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