Allow multiple MAC addresses to be bridged through my modem.
On an Arris SB6183, I appear to have a Max_CPE=1, so I cannot have more than one device talking to the modem at a time (all other traffic is filtered by the modem).
Until August 2017 (6 months ago), I was able to use two devices directly connected to the modem (each having obtained a separate IPv4 over DHCP from Cox).
My modem has not changed, nor has my internal network, nor the cabling (internal or external).
The value of max_cpe=1 was determined by me empirically, by mirroring traffic traversing the port where the modem is connected, capturing it and analyzing it. DHCP requests from my second device, are being sent to the modem, but it is dropping them (assumption), because no response comes back. Also, the addresses section of the modem's web gui (192.168.100.1/RgAddress.asp) shows only its own MAC and that of the one device which is working (i.e. receives public IP successfully). Previously, that section was showing the MACs of my two devices (both working fine for over a year) and oddly, the MAC of the switch to which the modem is connected (even though no locally-originated layer 3 traffic from that switch should have been going out on the port towards the modem).
Does anyone know if there has been official change in Cox policy about the number of allowed customer public devices?
By the way, I use the ultimate package and pay for unlimited data. Not being able to have router redundancy in my internal network because of the modem config, is very disappointing.
Any advice or assistance would be greatly appreciated.