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.
They are phasing it out but I'm going to escalate your issue to the Comcast corporate employees that are available to these boards. We've seen cases here where they have been able to get this accomplished for customers even when it is not listed in their rate cards, YMMV. You should get a reply here in your topic. Good luck !
I think technical support may not understand your question. Typically the modem will provide a IP addess to every device that is connetecd to it whether is wireless or wired on the LAN side. I am not familiar with modem that you are using.
I have a Xfinity XB7-7 and I have over forty devies connected to it via wired and wireless connections and each one of them has a unique IP addrtess in the range of 10.0.0.2 thru 10.0.0.253.
If you are trying to get two unique IP address assigned to the WAN side of the modem then Comcast woud need to address this.
.@PLCMAN You have a combo modem / router gateway device. They a have a straight cable modem. It's comparing apples and oranges.
Hello AbdOAhlam, the information that EG shared is correct we're phasing this feature out but I can take a look and see if there are any exceptions for your case. To better assist you please send me a private message with your full name by clicking on my name (ComcastAmir) and then click "Send a message".