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Computers behind router can't see rest of network (crappy MSpaint diagram provided)

post #1 of 9
Thread Starter 
Title pretty much sums it up.. I have a cradlepoint 3g router that is connected to all my computers. The first five are in the same room, and they all see each other no problem. I have a wired linksys router(via ethernet cable from last available cradlepoint port) feeding two computers in the next room. These two computers can see each other no problem but not the rest of the network. Im sure I am probably overlooking something simple (I hope). Any help would be greatly appreciated!!

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Thank you all in advance,
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post #2 of 9
You have to routers connected to each other with separate subnets. You will not be able to talk to the other subnet unless there is a specific route set.

This is especially true if the both use the same exact subnet, ie Router 1 serves 192.168.1.0 and Router 2 serves it's own 192.168.1.0 network.

If you can, shut all routing capabilities off on the 2nd router. Pretty much make it a managed switch. That way the 3G router will do all the routing and DHCP activities. Thus putting all computers in the same layer 2 subnet.
Edited by Biscuits_N_Gravy - 6/3/11 at 11:28am
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post #3 of 9
Thread Starter 
wow thank you for the quick reply.... is this a matter of changing the subnet of the wired linksys router to match the cradlepoint?
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post #4 of 9
No, what you want to do is set the router mode to "switch" or something along those lines.
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post #5 of 9
Thread Starter 
thanks alot man! btw awesome avatar! HST was an amazing dude!
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post #6 of 9
Thread Starter 
well ive disabled dhcp on the wired router (the only option i see to make this router act as a switch) but still no joy..... any other ideas
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post #7 of 9
Quote:
Originally Posted by RustyCage;13739677 
wow thank you for the quick reply.... is this a matter of changing the subnet of the wired linksys router to match the cradlepoint?

If I remember right, you will set Router 2 (Linksys) to "Bridge" mode. I believe that should be an option on there. Some routers don't have that option.

Connect them together with the ethernet ports, don't use the WAN port on the linksys router. If router1 has an IP of 192.168.1.1, make router2 192.168.1.2.

Then the linksys router will just obtain an IP from the 3G router, and then pass DHCP and router to the 3G router.

If you don't have that option and can't use DD-WRT, you can always just buy a switch. Make sure to get a switch and not a Hub.

In you situation, you really only need the one Router with a switch behind it.

Hopefully that helps, it's actually been awhile since I did this on a set of SOHO routers.
Edited by Biscuits_N_Gravy - 6/3/11 at 11:48am
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post #8 of 9
Quote:
Originally Posted by RustyCage;13739635 
Title pretty much sums it up.. I have a cradlepoint 3g router that is connected to all my computers. The first five are in the same room, and they all see each other no problem. I have a wired linksys router(via ethernet cable from last available cradlepoint port) feeding two computers in the next room. These two computers can see each other no problem but not the rest of the network. Im sure I am probably overlooking something simple (I hope). Any help would be greatly appreciated!!

<
SEE DIAGRAM BELOW
>
networksetup.jpg
Thank you all in advance,
RustyCage



What you really need to make this work flawlessly is a switch, not a router. The router is creating a second subnet and therefore cannot see anything on the other side as your seeing. Depending on the model, you can work around this and get it to work, but I only ever got it to work well with an old Linksys 54g, other models today get automatic updates and anytime an update came, it broke the setup making using a router for a switch a painful situation.
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post #9 of 9
1) Disable DHCP on secondary router.
2) Assign static IP in same subnet on secondary router.
3) Connect routers together using LAN ports.

That's really all you need to do.
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