How to get comcast modem and wireless router on same ip segment

Posted on 2013-06-13
Last Modified: 2013-06-13
I have internet service through Comcast.  The Comcast modem has 4 ports for ethernet and is on the 10.0.1.X segment (for ip addresses).  The 4 ports are being used by 3 hardwired computers and a printer/scanner.  I want to install a Belkin wireless router which will give me 4 additional ports but the belkin gives out ip addresses in the 192.168.1.X segment.  I want to be able to allow users to connect their laptops to the wireless network and be able to print to the printer which is on the 10.0.1.X segement (hardwired).  How can I accomplish that?  Comcast tells me I cannot change their ip addresses amd when I try to change the Belkin Wireless to the 10.0.1.X segment it tells me there is a conflict in the addresses.  Comcast suggested I put in an 8 port switch, connect it to the modem, and then connect the wireless router to it.  Before I spend the money, will that work?  Will I be able to connect wireless devices and have them show up on the 192.168.1.X segment?
Question by:foxhelp
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Expert Comment

by:Joe Winograd, EE MVE
ID: 39245654
> Will I be able to connect wireless devices and have them show up on the 192.168.1.X segment?

Yes. For example, if you have a 4-port-wired/wireless router plugged into the Comcast modem and then have a multi-port switch (or two or three) plugged into the wired port(s) of the router, all of the addresses assigned to devices on the switches are in the same segment as the router, such as 192.168.1.X. Regards, Joe
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Accepted Solution

Joe Winograd, EE MVE earned 500 total points
ID: 39245693
Oops...I just realized that I got Comcast's comment wrong! Connecting a switch to the modem and then a router to the switch is the opposite of what I always do. I connect a router to the modem and then a switch to the router...and that should work for you. Don't use any ports on the Comcast modem except connect to the Belkin router. Then install an 8-port switch into the Belkin and connect the three hardwired computers and printer/scanner to the Belkin and/or the switch. All addresses (Belkin and switch) will be in whatever range you configure on the Belkin, such as (wired and wireless devices). Regards, Joe

Author Closing Comment

ID: 39245746
Thank you very much.  That makes sense.
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Expert Comment

by:Joe Winograd, EE MVE
ID: 39245791
You're welcome. And I know that it works because it's exactly what I do! Regards, Joe

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