Two routers one cable modem?

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Lewis Morgan

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Apr 16, 2015
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Hi, i currently have the problem in my household that my roommate owns the router. I was wondering if it would be possible to connect two routers two a cable modem i have downstairs? If its possible could you please walk me through it step by step, im not particularly good with computers.

Thanks!
- Lewis

EDIT: Been reading up a bit more and its it possible for the second router to not be connected to the first one. For instance, can i just have two cables from the modem going to either router?
 
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g90814

g90814

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Apr 11, 2013
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The cable modem likely only has one connection. You cannot have your own separate connection to it, even with a switch as mentioned previously.

If you have a wired connection available to the other router, you could set up another router that has a separate network from your roomates.

If your cable modem is in fact a modem/router combo, and has LAN ports, you could connect your own router for a separate network also.
 
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Pooneil

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Apr 15, 2013
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In the typical installation, the cable modem needs to connect directly to the WAN port on a singe router. What you are suggesting appears to be incompatible with the norm. Care to fill in the details on how to do this?
 
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Illumynization

Illumynization

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Nov 12, 2013
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Disable DHCP on one of the routers. Keep DHCP on the other. Both routers should have a static Internet IP address. Both should also have an external public IP address.

You'll want to run a crossover cable or an ethernet cable if both routers support auto-MDIx (won't need a crossover cable, switch ports adjust). Connect via the open switch port, not WAN port, on the routers.

On your computers that you want to use the router W/O DHCP configured, you'll want to set them up statically to go to the specific router without DHCP.

This should make your entire network available to each other because the routers will be connected together like switches internally. The router function on each should still work.

You could also download some form of software for Network Load Balancing which could do what you want.

http://www.tomshardware.com/forum/20231-42-modem-switch-routers-question
 
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Pooneil

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Consumer level and many business oriented DSL and cable internet connection only offer one IP. It is unlikely the OP has two public IPs nor can the routers share one.
 
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