Now there is some hardware called Y-Splitter available in the market but I didn't have the time to order that, and I think they charge a lot more money that the device is worth. A Y-Splitter makes use of the 4 unused wires out of the 8 present in a CAT 5 cable and up links 2 ports (from the link source) into 1 and then branches it off again into 2 points (at the link destination).
Illustration:-
I however wanted to use the router I already have (Secondary) besides the Gateway Modem provided by the ISP (Primary). The Idea is to provide multiple network points at the site away from the Primary without introducing a new series of IPs the the Secondary would normally generate. This way there would be two networks with different GATEWAYS and having multiple network devices in the same WorkGroup will be difficult.
To be able to do this there are a few things I needed to take care of:
1. Assign a Local IP to the Secondary from the series of the Priamary Gateway but out of the range defined in the Primary.
2. Disable the DHCP (Dynamic Host Configuration Protocol)Server on the secondary server so that Secondary ceases to act as a router and doesn't start allocating its own series of IPs.
If the range on the Primary is set as 10.1.10.2 to 10.1.10.100, set the Secondary Router IP to something outside this range like 10.1.10.101
3. It is important to leave the WAN (Wide Area Network) port on the Secondary unconnected.
The WAN port would normally serve to receive a connection from the outside network - Internet and then route it to other devices over the LAN (Local Area Network). We don't want the Secondary to do that.
4. Instead connect the UpLink (any LAN port) of the Primary to the UpLink port of the Secondary and then route connection to other devices from the Secondary as you would normally do.
This way the Secondary functions as a Switch rather than a Router. All devices on the network would now have IPs from the series and in the range defined on the Primary.
Illustration:-