How to bridge 2 routers with another router?

I have 2 computers that I want to make them talk to each other even without internet connection and they are connected on 2 different routers. The internet comes from Router A. From Router A there are 2 routers connected: Router B and Router C. My PC is connected to Router B and the Server is connected to Router C.

How can I ping/make the 2 computers communicate to each other by using this network hierarchy ?

This is the network structure I'm talking about:

TermoZour

Posted 2018-10-30T18:34:29.523

Reputation: 267

Yes, you can. I hope that only one router is the DHCP server. And why is Router C not on the same network segment as everything else? – harrymc – 2018-10-30T18:49:32.860

Router B and C are connected to 2 lan ports of Router A. Pinging from PC to Server returns timed out every time. – TermoZour – 2018-10-30T18:54:15.450

1Is your intent to keep them isolated in their own networks or to have them be part of the same LAN? Your picture contradicts both options. – HazardousGlitch – 2018-10-30T21:49:45.310

My intent is to make 2 networks. Computers connected to Router A have 1 network, and Router B and C have another network. The picture shows how they're all set up ATM and how traceroute sees the networks – TermoZour – 2018-10-31T05:27:24.083

Is numbering the server 192.168.1.250 a mistake? It isn't connected to any other device numbered inside 192.168.1.x as far as I can tell. – David Schwartz – 2018-10-31T18:41:43.170

You are right, it is a mistake. The IP address should have been 192.168.2.250 – TermoZour – 2018-11-01T01:35:14.893

Answers

You have here three network segments : 192.168.0.X, 192.168.1.X, 192.168.2.X, because probably your network mask is the default 255.255.255.0.

So the communications you are interested in cannot cross over from one to the other.

I suggest to :

Let Router A be the DHCP server and disable this feature in Routers B & C.
You don't need static IP addresses if everything is dynamic, but you are going to have them they should be in one segment only. The most common is 192.168.0.X.
Ensure that Routers B & C either use dynamic IP or are allocated static IP addresses in the right segment.
If the routers are connected via cable, ensure that connections are LAN-to-LAN, like this:

For more information, see the post:
Expanding wireless coverage: What are the differences between LAN to LAN and LAN to WAN when it comes to connecting two wireless routers?.

harrymc

Posted 2018-10-30T18:34:29.523

Reputation: 306 093

At the 3rd bullet "Ensure that Routers B & C either use dynamic IP or are allocated static IP addresses in the right segment", what do you mean exactly by "use dynamic IP" ? Their IP from the DHCP Client List of Router A ? – TermoZour – 2018-10-30T19:12:11.363

@harrymc Please stop flagging comments that are correct. – DavidPostill – 2018-10-31T17:18:20.740

@DavidPostill: Fine, I changed the wording slightly, now it's no longer correct and you may delete it. Do we agree? – harrymc – 2018-10-31T17:23:37.357