Daniele_Sunrise I did reboot my router, to no effect. However, after poking around a bit over lunch (and doing another Connect Box reset), I figured out that my laptop’s USB Ethernet adapter can successfully request an IPv4 address with the Connect Box in modem mode.
While clicking through the Connect Box menu in router mode I found the following in “Advanced Settings > Tools > Network status > Configuration”: “Maximum Number of CPEs: 2”. Since I get an IPv4 address with the Connect Box in router mode and my laptop’s USB Ethernet adapter, I assume that the MAC addresses of those two Ethernet adapters are stored somewhere as my CPEs.
I originally did setup and test the Connect Box’s modem mode with the USB Ethernet adapter which can request an address successfully, then connected the box to my router. The initial setup on my side happened on June 9, the day I got the Connect Box to replace my Ubee modem. Initially the router was assigned an IPv4 address and I figured that everything was ok.
Since I don’t check regularly whether the connection is up, as I use the UPC free tier internet connection as a backup connection for when my primary provider goes down, it’s possible that the connection was lost earlier and my router’s log data was simply misleading me to think that this only started last Friday.
To summarize my impression of the situation: Currently, you can only have two CPEs (customer provided equipments) for your UPC internet connection (one of which will always be the Connect Box in router mode). Additionally since I originally tested modem mode with my laptop’s USB Ethernet adapter, that adapter is now registered as a CPE for my connection, leaving the router unable to get an IP address assigned.