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Well, you certainly can, but in most cases it only makes things more complicated than they need to be.
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To actually do it, I'd put a hub in front of the two routers. So your cable modem would go into the hub, each router would be connected to the hub, and each would configured to respond to one of your two static IPs. You could then connect your computers to one router or the other, as you saw fit.
I'm just not sure why, in most cases, you'd want to do so.
The drawback here is that your machines on one router will not be able to share folders or printers with machines on the other router. Each router represents its own private sub-network on the internet.
Multiple internet IP addresses are really only useful if you have multiple computers that you want to access from the internet. For example you might want to set up two web servers, in which case each would need its own IP address. For most common home and small business situations, that kind of setup is actually pretty rare.
My ISP has allocated me 5 IP addresses here at home, but I use only one. All the computers in my house (8, I think) are connected behind a single router. I really don't have any need for the other 4 IP addresses at this time.
I suspect that, unless you're doing something special, you really only need one of your two IP addresses. It'll certainly be the simplest approach.
Related:
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Ask Leo! - What can people tell from my IP address?
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Ask Leo! - How do I figure out who owns an IP address?
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Ask Leo! - Why does my home network only work with one computer at a time?
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Ask Leo! - What happens if two computers have the same IP address?
Article C2324 - April 6, 2005
My cable provider does not supply static IP addresses. Can this still be done without static IP's? If so how does each router know to get a different IP address?
Posted by: John at December 12, 2008 6:46 AMHi, Leo
Posted by: Tanel at February 17, 2009 12:03 PMCan u help me with that, i have one router and 2 computers. they both are same ip-s. but i play one game with my brother and i was wondering, if there is possible to change ip-s to different? then we could have different ip-s with one router. can u help please. thanks
hello i need second 2 ip address beacuse i have ojo and viedo phone now they spreated easy to contact which can easy to contact ????
Posted by: marcus ridley at February 19, 2009 8:17 AMi have a laptop that is connected to peoplepcdsl modem.my daughter who is in the same apartment as i am has a verizon dsl modem.how can we use our computers at the same time when i only have i phoneline
26-Feb-2009
Hey. I have a couple of questions.
Like let's say, I'm currently playing Xbox Live, and I have 1 cable modem and I'm using 1 wireless router.
When my family uses the computer I start lagging on Live. If I buy a second router, would it stop this problem?
16-Feb-2010
Posted by: Kenny at February 15, 2010 10:56 PM