Issue with modem-router

[Swearinbag]

https://imgur.com/a/01XuM

Pictures above show the following:

Top: modem
Bottom: router

Yellow cable: connected from output to laptop for troubleshooting

Gray cable: connected from modem out to WAN on router.

Laptop connects to router, gets ip etc but router and modem seem to not communicate. Both lights don't blink at all and stay permanently lit.


No clue what I'm doing wrong.

-edit-

https://imgur.com/2uSKFxz

Got this error - would it help to reset router/modem?

 

[RealBeast]

It is very odd that you have two devices with multiple LAN ports, looks like two gateway devices -- not just a simple modem and router.

I see the Technicolor TG670v2 gateway from your picture -- do you consider that a router?

And what is the brand and model of the second device that you are calling a modem?

 

[Ralston18]

Is the connection on the right side of the modem coming in from your ISP? Maybe a "filter" or "splitter" that takes a telephone line connection and divides the connection between modem and a telephone....?

What make and model are the modem and router? Do you have the respective User Guide/Manuals?

Only one device (modem or router) should be assigning DHCP IP addresses and if you did not disable that on one or the other then that could be part of the problem.

It also appears that the modem to router connection should be going to a LAN (yellow) port on the router if you are using the Modem to provide DHCP IP addresses.

Try a simpler network setup:

Remove the router and see if you can gain internet connectivity and some home network connectivity just via the modem. Use the laptop and yellow Ethernet cable direct to modem (yellow port).

You will need to configure the laptop's Network adapter to match the modem.

 

[RealBeast]

It looks like two gateway devices to me, just cannot see the model of the first device to be sure. The Technicolor alone should suffice if it is acceptable to the ISP as it has a DSL input and does DHCP.

 

[Swearinbag]

@RealBeast - yes the technicolor is considered my router. The "modem" as I call it is a "technicolor a-mod 3" device.

@Ralston18 - modem is master, router is slave that provides DHCP to connections. ISP let me know that the connection issue is after the modem, probably router. I also tried the laptop thing, didn't work, sadly or I'm doing it wrong.

 

[RealBeast]

I don't understand why you do not just connect the DSL cable to the Technicolor TG670v2 gateway, configure it and boom you have a home network.

Why do you need the first device since the TG670 is a gateway (a modem and router combo)?

If for some odd reason you want/need the first device also, it should require a DMZ to the second. ??

Perhaps you could expand on your thinking on this or instructions that your ISP gave you that you needed the two gateways? (and as an aside your ISP is who?)

As to not confuse you too much, either Ralston or I will follow up -- I'll leave it to his call. Both of us giving you different advice will not be productive.

 

[Swearinbag]

@RealBeast - my ISP hasn't white listed the tg670v2 so they use the a-mod 3 so the router can read that signal it outputs and inputs. Problem is that neither of the devices has access to the internet nor seems to communicate with each other

 

[Ralston18]

@Realbeast. Thank you. However, please feel free to chime in with additional comments and suggestions if I do seem to go astray.

@Swearingbag:

I do agree that the TG670v2 should work just on its own.

As an interim step, start with only one device. E.g. the a-mod 3 if that is from/provided by your ISP. Limits your ISP from blaming the other "router" device or someone/something else.

Do you have the a-mod 3 User Guide and Manual? More specifically, 4400297 ADSL2+ Modem Router.

Perhaps the following link:

https://fccid.io/PY314400297/User-Manual/User-manual-2015-rev-3-pdf-2680448

Disconnect all current connections and start fresh following the User Manual.

Get your "modem" working first if possible. I.e., Internet access and all wired ports proven to work along with wireless. Or be able to determine that it is not working.


Then you take the next step(s) necessary to incorporate the TGH670v2 into your network.

Being the following device - correct?

https://www.speedguide.net/routers/technicolor-thomson-c2000t-wireless-n-voip-broadband-3985

To do so will require you to select one or the other to be the main router and DHCP disabled on the other device. And you must assign applicable IP addresses beforehand.

(And I still believe that you need a LAN to LAN connection between the two using the yellow colored ports.)

Still, for the time-being focus on just getting the" a-mod 3" working.