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Daul WAN with multiple ISP

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salmon

Occasional Visitor
Hello,

My hardware is as follows:
- Asus AC68U (running merlins firmware)
- BT Openreach Huawei fiber modem (connects to Asus AC68U)
- BT smarthub (new ISP equipment, not yet installed)
- Sky Hub (not in use currently)

I currently have one ISP but I am having a second line installed with another ISP so that I have two connections.

On the first line the BT Openreach Huawei fiber modem is connected to the WAN port of my Asus AC68U. To allow this to connect I have to use Manual clientid (Option 61) on the Asus AC68U.

As I don't have another BT Openreach Huawei fiber modem and both lines require different authentications I will need to use the BT smartshub provided by the ISP.

When I setup my new line and connect it to the Asus AC68U router via dual wan I believe I would first need to disable DHCP on the BT smarthub and use DHCP on the Asus AC68U.

Once the DHCP is being handled by the Asus AC68U I need to disable NAT on the BT smarthub, however I don't think this is possible? So I was going to try and set up a DMZ.

- Do I set up a DMZ on the Asus AC68U for the BT smarthub?
- Will this setup work?

If you have any other ideas on how I could get this setup working please let me know. I was thinking possibly of use the old Sky hub to handle authentication and disabling NAT on the Asus AC68U instead.
 

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