Possible ways Connecting two routers with one modem?

  (modem) ==> D-Link (router) ==> Linksys (router)

Yes, this is absolutely doable and in some cases preferred (usually for security reasons) when you want everything connected to the outside router to act such as a DMZ and everything inside as a protected network.

This is what I consider a nested NAT configuration. The problem that could arise with this configuration though is that the PCs behind the Linksys router will be "double NATed". If you are not planning on having anything out on the internet or anything that is connected to the D-Link router (or outside router) connect to the Linksys (or "inside" router) then you should have no problem.

You can still do this anyway but it will require port forwarding rules on both routers. I am assuming these are "broadband" routers and have NAT already turned on. If so you may choose to leave it like this if you so please or to turn NAT and DHCP off and use them as stand-alone Ethernet bridges.

In bridge mode the routers will act as simple switches and switch traffic between all connected devices in one flat broadcast domain, but this will require more configuration than the previous methods and may be problematic setting up. 


Apart from above way,

You can also Go into the settings on the linksys router and turn DHCP off. Access the admin page

by plugging into the linksys with a patch cable, getting ip address, might be 192.168.0.1 or

192.168.1.1. (To find this, Start, Run, type "cmd", Ok, type "ipconfig", default gateway is the

router). Put this IP address in a web browser. Then, use default username and password, google if

needed, and disable DHCP. Make sure to plug your link cable from the D-link to the Linksys into one of

the LAN1-4 ports and not the Internet port, as that means it will be acting as a router, and you want it to act as a switch.



Check these Links up:

http://en.wikipedia.org/wiki/Network_add...
http://en.wikipedia.org/wiki/Demilitariz...
http://en.wikipedia.org/wiki/Network_bri...
http://en.wikipedia.org/wiki/Broadcast_d...

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