Dual WAN problem - USB modem is disabled..

[gekko44]

Hi,

I was testing dual Wan option with sub modem as a backup connection. During setup phase I've clicke "disable USB modem" at the top right, and since then there is no way I can make it work again. I have:
- restarted router
- factory reset
- disable/enable modem
- disable/enable dual wan
- disconnect/connect modem

Any ideas ?



EDIT:
I have Asus RT-AC56U@Merlin380.56_4

 

[gekko44]

Hello - anyone ?

@RMerlin Can You please help or have any clue ?

 

[RMerlin]

No idea, I don't deal with the Dual WAN support. It's always been quirky, and that code is too complex for me to study.

 

[ninjaoxygen]

I did the same and have no idea how to fix it from the GUI.

To fix it from the command line of the router though, do:

nvram set wan0_enable="1"
nvram commit
reboot

or for you where the USB Modem is wan1, it is probably

nvram set wan1_enable="1"
nvram commit
reboot

 

[gekko44]

I did the same and have no idea how to fix it from the GUI.

To fix it from the command line of the router though, do:

nvram set wan0_enable="1"
nvram commit
reboot

or for you where the USB Modem is wan1, it is probably

nvram set wan1_enable="1"
nvram commit
reboot

You saved my day !

Thanks savior works like charm ;-)))

 

[hytekj]

No idea, I don't deal with the Dual WAN support. It's always been quirky, and that code is too complex for me to study.

@RMerlin do you have any custom code related to the USB modem?

I am using a USB modem as a primary internet connection. I have an old 68u running old firmware and from cold router reboot to boot with working connection to the USB modem it takes maybe two minutes. Problem is that old 68u running the old firmware is unstable where the wireless interface goes in and out (I could be sitting next to it and it drops down to one bar signal).

I just bought a brand new 68u and loaded Merlin firmware and the USB modem basically does not work. On a factory reset it works as a failover. As soon as I turn off dual WAN and set USB as the primary connection, it never connects. It doesn't even try to connect it just says disconnected. I tried switching dual WAN back on and it won't connect again. I grabbed the old router with old firmware in, substituted it in, and it connects instantly. So something seems broken....

Thank you

 

[RMerlin]

@RMerlin do you have any custom code related to the USB modem?

No, as I have no way of testing anything (and it would vary between models anyway).

 

[hytekj]

No, as I have no way of testing anything (and it would vary between models anyway).

Thanks for the speedy reply. Is there any database of known issues with Asus either accessible to the public or that you have insight into? Something key to note is the old 68 with the old non-Merlin firmware does not have a dual WAN mode from what I can see. Maybe the dual WAN mode is what is introducing the issue?

 

[RMerlin]

Thanks for the speedy reply. Is there any database of known issues with Asus either accessible to the public or that you have insight into?

No.

Something key to note is the old 68 with the old non-Merlin firmware does not have a dual WAN mode from what I can see. Maybe the dual WAN mode is what is introducing the issue?

Asus added Dual WAN support to all their high-end models a couple of years ago, so it's nothing new on the RT-AC68U.