RT-AC68U Dual Wan failback problem

[tester83]

Hi all. I have Asus RT-AC68U (h/w A2) with firmware 380.59_beta1 with dual Wan configuration. Primary wan is pppoe with modem and primary is 3g/4g.

Modem is Netgear DGN 2200v3.
3G/4G USB is Huawei E3372.

When primary Wan goes down (or timeout) router swap on secondary but remains here. No failback despite primary Wan was Ok. I had manually checked the connection directly on modem/router.

The only way to restore primary Wan connection is to restart the router.
I have no results with these commands:
- service restart_wan
- ifconfig eth0 down / ifconfig eth0 up
- ifconfig eth3 down / ifconfig eth3 u

I have the same problem with latest asus firmware 9.0.0.4.380.2695.

I have found only this old article:
http://www.snbforums.com/threads/rt-ac66u-3g-4g-backup-mode-issue.11228/

Is this possible to fix my problem via script? I have just enables JFFS partition.

Thank you for your help.

 

[tester83]

I have bought Asus RT-AC88U. With original firmware 3.0.0.4.380_2345 wan failback doesn't work (i have waited 90 seconds).

I have changed firmware with Merlin 380.58 and failback now work. Now i test this new router with Merlin firmware for some days.

 

[stylish_me]

Dual wan is not touched by Merlin unfortunately. So he is not going to fix anything. Nor his firmware can affect dual wan. So it's only Asus' fault if smth works wrong with dual wan.. And you need to wait for Asus to fix it.
I've got lots of problems with dual wan within last year.

 

[tester83]

Dual wan is not touched by Merlin unfortunately. So he is not going to fix anything. Nor his firmware can affect dual wan. So it's only Asus' fault if smth works wrong with dual wan.. And you need to wait for Asus to fix it.
I've got lots of problems with dual wan within last year.

Thank You stylish_me. Probably my ac68u was buggy as is does not work as well with 3G , with freezing problem after an uptime of 1 or 2 days (with all merlin firmware).
Now i'm testing this new router AC88U. Uptime in only of 3 hours and 15 minutes. No problem now.