Help me Optimize - Xfinity External Amplifier, 2 active lines coming into the house

Apr 12, 2018
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**EDIT** This probably nullifies the whole point of the question - Comcast just confirmed they would charge extra for use of a second modem. Pretty lame... Thanks anyway - advice is appreciated, but I think I'm back to just standard home networking world. In that regard, can you access all of the standard networking options in your router, if it's a rented xfinity router?

I apologize in advance if some terminology is incorrect.

External amplifier that has two active lines coming into the house.
One line is coming to the upstairs bedroom
Other line is coming to the finished basement (opposite side of the house)

1) In my mind, the easiest option is to have two modems at each line + a router at each modem. Routers would be configured with same SSID + Password. Theoretically as you moved across the house you would connect to the other router seamlessly. Yet with IP assignments, I'm afraid this might not work. I have experience in hardwiring routers across long distances in a bridged setup. I understand you need to turn off DHCP on the bridge router, and exclude its IP from the assignment page of the first router. Those concepts seem relevant in this new situation, but I'm not sure how to account for them. Can I just apply the same concept? Exclude assignment of each router's IP and let each router assign IPs to the connected devices as they move through the house?

2) I'm trying to ask xfinity if they would charge extra for the 2nd modem. I know we would have to add the mac address to our account. If it will cost extra, that's obviously a no-go. I just would like the extra bandwidth of both coax inputs if possible.

 


I won’t pretend to understand the economics. It just seems like it wouldn’t cost them anything extra.

If that’s the case, why would you even want two separate lines installed as such?