Connecting two independent router into Optical Network Terminal

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paijo122

Reputable
Nov 15, 2014
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Hi, currently I have an Optical Network Terminal (ONT / connected to ISP gateway) with DLink AC1750 wireless router. Since the walls in my apartment are very thick, I couldn’t get a Wi-Fi signal in my main bedroom. So I decided to buy another wireless router (Dlink DSL 275U).
I can connect the second router directly into the ONT through a LAN cable port in my apartment wall.

What is the configuration for the second router, should I turn on the DHCP server?

Notes:

I’ve already tried, but it’s not working with conf:
- set both router into the same name, same user & password (pppoe settings),
- different channel for both of them (Router 1: 1, Router 2: 11),
- enabling DHCP server on 1st router, turning off DHCP server on the 2nd one,
- setting router 2 IP’s within router 1 network coverage

Optical Network Terminal ------------------------------ Router 1 (AC1750)
|
|
|
----------------------------------------------------Router 2 (DSL 275U)
 
Solution
B
It to a point depends on the ISP but ONT normally is just a stupid device that does nothing more than a modem.

If the device is a router then I would run both your routers as AP and let the ISP box do the routing. The hint that it may be a router is if you plug just the PC into the ONT directly you get a private ip address which likely means there is nat involved already.

If the device is a modem you likely will not be able to get it to work plugging both your routers into the ONT. It is not that it technically can't work it is the ISP has rigged it so it won't work. They would likely charge you for a second connection/ip address if they allowed it. This is pretty much the same reason you can't hook 2 pc/router to a cable...
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Enthusiast Builder

Enthusiast Builder

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Jan 17, 2014
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Can you connect one router to the other (one LAN port to the other's LAN port)? That's what I would suggest doing - you don't want to have two separate networks for your home (which is what will happen if you hook both into the ONT - they'll both try and do NAT, and run their own networks). You wouldn't, for instance, be able to stream from your home server/main computer to a tablet in your bedroom with that configuration (well...you could...but it would be a lot LOT harder).

I suggest you pick one router to be the "router" (actually do the routing, run a firewall, take care of NAT, do DHCP, etc), and then have the other router act as a wireless access point (in your bedroom). To do this, you hook up the LAN port of the main router (in the rest of the APT) to the LAN port of the other router that will become a wireless access point (in your bedroom). The bedroom router/wireless AP needs to have its DHCP turned off, and you need to assign it a permanent IP. The main router has to have its DHCP range trimmed down so it doesn't interfere with the AP's fixed IP. For instance, if your network is 192.168.1.x, I'd make the bedroom router/wireless AP 192.168.1.2, and then make the main router assign DHCP starting with like 192.168.1.3.

You'll have one "network", so anything connected to it can talk to the other things, but your network will be consist of a router/wireless AP in your living room, and then a wireless AP/switch in your bedroom. Make sense?
 
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bill001g

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Aug 9, 2012
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It to a point depends on the ISP but ONT normally is just a stupid device that does nothing more than a modem.

If the device is a router then I would run both your routers as AP and let the ISP box do the routing. The hint that it may be a router is if you plug just the PC into the ONT directly you get a private ip address which likely means there is nat involved already.

If the device is a modem you likely will not be able to get it to work plugging both your routers into the ONT. It is not that it technically can't work it is the ISP has rigged it so it won't work. They would likely charge you for a second connection/ip address if they allowed it. This is pretty much the same reason you can't hook 2 pc/router to a cable modem....you can but the ISP has disabled the feature.

It is most common for a device called a ONT to be a modem so I suspect you will need to follow the advise in the previous post and daisy chain your router using the second as a AP.
 
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