Has anybody configured their modem this way? I do not need the ports linked, I really need a 2nd IP address, as our mesh network is not cutting it for everyone working, schooling from home. Is it possible to provision our modem this way? What do we need to do?
First, check the "Rate Card" for your local area to see if that feature is even available anymore. Seems that it is being phased out;
It's a PDF.
Scroll down to "Xfinity Internet" and look for "Additional IP Addresses".
If nothing is listed then it's likely to have been discontinued in your local market area.