ASUS RT-AX86U Pro - no WAN connectivity upon reboot when running in Dual-WAN/Load-Balance mode

[Hello_Bee]

Hi all,

I have a new ASUS RT-AX86U Pro router - I am running it in Dual-WAN/Load-Balance mode.
I noticed that it does not have WAN Internet connectivity upon reboot/restart when running in this mode.
This issue is present in both the Merlin firmware as well as stock ASUS firmware and occurs ONLY when running the router in "Dual-WAN/Load-Balance" mode.

(See steps below to reproduce the problem and a workaround).

Upon rebooting the router, the devices can connect via WiFi and LAN to the router.
I can access the Web GUI of the router as well.
But the router does not have WAN Internet connectivity (web-browsing, ping, etc. does not work).
There is no indication of any error on the Web GUI either.

I have found a workaround for now.
Here are the steps to reproduce the problem and the workaround:

1. Login to the Web GUI of ASUS RT-AX86U Pro router.
2. Make sure that the router is configured in "Dual-WAN/Load-Balance" mode as follows:
WAN -> Dual WAN -> Primary WAN -> 1G WAN
WAN -> Dual WAN -> Secondary WAN -> 2.5G WAN
WAN -> Dual WAN -> Dual WAN Mode -> Load Balance
3. Ensure that both Primary and Secondary WAN are connected.
4. Reboot the router.
5. Upon reboot, connected devices will NOT have WAN Internet connectivity (i.e. you cannot ping or browse to any of the website on Internet) even though Web GUI shows all normal.
6. Login to Web GUI and Turn-OFF Primary WAN Internet Connection as follows:
Network MAP -> Primary WAN -> Internet Connection -> OFF
7. Wait about 10 seconds.
8. Now Turn-ON Primary WAN Internet Connection as follows:
Network MAP -> Primary WAN -> Internet Connection -> ON
9. Wait about 30 seconds.
10. All connected devices will now have WAN Internet connectivity.

This workaround is not feasible as a permanent solution as we all rely on the router to connect to Internet upon reboot.

Any and all help will be great appreciated. Thanks in adfance!

 

[bbunge]

Put the router on a UPS and don't reboot it unless you are there to fix it.
It has been noted times before the Dual wan is buggy.

 

[kuki68ster]

Asus Dual Wan is buggy, you can try to use the script from @Ranger802004, if you have Merlin and amtm:

WANFailover - Dual WAN Failover ***v2 Release***

WAN Failover is designed to replace the factory ASUS WAN Failover functionality, this script will monitor the WAN Interfaces using a Target IP Address and pinging these targets to determine when a failure occurs. When a failure is detected in Failover Mode, the script will switch to the...

www.snbforums.com

 

[Tech9]

This issue is present in both the Merlin firmware as well as stock ASUS firmware

Asuswrt-Merlin has no changes to stock Dual WAN. This Asuswrt feature is good for advertising purposes only.

 

[Ranger802004]

Asus Dual Wan is buggy, you can try to use the script from @Ranger802004, if you have Merlin and amtm:

WANFailover - Dual WAN Failover ***v2 Release***

WAN Failover is designed to replace the factory ASUS WAN Failover functionality, this script will monitor the WAN Interfaces using a Target IP Address and pinging these targets to determine when a failure occurs. When a failure is detected in Failover Mode, the script will switch to the...

www.snbforums.com

Thanks for the mention, yea there are some issues with Load Balancing Mode from ASUS and the most obvious being that it relies on FWMarking but doesn't create all of the rules correctly on startup for load balance mode. I have this corrected in my Dual WAN script mentioned above.

 

[Hello_Bee]

Asus Dual Wan is buggy, you can try to use the script from @Ranger802004, if you have Merlin and amtm:

WANFailover - Dual WAN Failover ***v2 Release***

WAN Failover is designed to replace the factory ASUS WAN Failover functionality, this script will monitor the WAN Interfaces using a Target IP Address and pinging these targets to determine when a failure occurs. When a failure is detected in Failover Mode, the script will switch to the...

www.snbforums.com

Please forgive my ignorance, but...
What's amtm?

 

[Hello_Bee]

Thanks for the mention, yea there are some issues with Load Balancing Mode from ASUS and the most obvious being that it relies on FWMarking but doesn't create all of the rules correctly on startup for load balance mode. I have this corrected in my Dual WAN script mentioned above.

Thanks for putting it out there. I have this bug as a pending issue with ASUS - I'll wait for their response before I attempt to install the Merlin firmware.

 

[kuki68ster]

Please forgive my ignorance, but...
What's amtm?

amtm is a front end that manages popular scripts for wireless routers running Asuswrt-Merlin firmware. Starting with Asuswrt-Merlin 384.15, amtm is included in the firmware.

Give a read on the links below:

amtm - amtm 4.9 - the Asuswrt-Merlin Terminal Menu, June 30, 2024 (locked thread)

Welcome, this is amtm 4.9.1, the Asuswrt-Merlin Terminal Menu amtm is a front end that manages popular scripts for wireless routers running Asuswrt-Merlin firmware. Starting with Asuswrt-Merlin 384.15, amtm is included in the firmware. What's new in amtm 4.9.1 Adds support for amtm firmware...

www.snbforums.com

https://www.snbforums.com/threads/amtm-step-by-step-install-guide-l-ld.56237/

amtm - the Asuswrt-Merlin Terminal Menu - Diversion

diversion.ch

 

[tarzan2000]

Nov 23 08:31:58 BWDPI: Don't support load-balance mode!
Nov 23 08:31:58 BWDPI: module is blocked, reason=5!
Nov 23 08:32:01 BWDPI: Don't support load-balance mode!
Nov 23 08:32:01 BWDPI: module is blocked, reason=5!
Nov 23 08:32:04 BWDPI: Don't support load-balance mode!
Nov 23 08:32:04 BWDPI: module is blocked, reason=5!
Nov 23 08:32:07 BWDPI: Don't support load-balance mode!
Nov 23 08:32:07 BWDPI: module is blocked, reason=5!

AX86U

 

[Ranger802004]

Nov 23 08:31:58 BWDPI: Don't support load-balance mode!
Nov 23 08:31:58 BWDPI: module is blocked, reason=5!
Nov 23 08:32:01 BWDPI: Don't support load-balance mode!
Nov 23 08:32:01 BWDPI: module is blocked, reason=5!
Nov 23 08:32:04 BWDPI: Don't support load-balance mode!
Nov 23 08:32:04 BWDPI: module is blocked, reason=5!
Nov 23 08:32:07 BWDPI: Don't support load-balance mode!
Nov 23 08:32:07 BWDPI: module is blocked, reason=5!

AX86U

Somehow a Trend Micro feature is enabled while in load balance mode. Make sure everything from QoS to AiProtect is turned off.

 

[bennor]

Somehow a Trend Micro feature is enabled while in load balance mode. Make sure everything from QoS to AiProtect is turned off.

To add to this, after disabling/turning off those features; one may also want to click the Withdraw button(s) on the Administration > Privacy page if that option is present on that page.

 

[Tech9]

Administration > Privacy

You guys still have Privacy? We've got Policy!

Release - Asus RT-AX86 Series Firmware version 3.0.0.4.388_24231 (11/07/2023)

@bennor Thank you for the updated post, and info. I took your post and made it the initial post replacing my own, so all the major info is correct. If there is anything else I need to add / change let me know. Thanks

www.snbforums.com

 

[tarzan2000]

Somehow a Trend Micro feature is enabled while in load balance mode. Make sure everything from QoS to AiProtect is turned off.

Everything is turned off. I checked it specifically.

To add to this, after disabling/turning off those features; one may also want to click the Withdraw button(s) on the Administration > Privacy page if that option is present on that page.

Yes, it helped.

 

[bennor]

You guys still have Privacy? We've got Policy!

Release - Asus RT-AX86 Series Firmware version 3.0.0.4.388_24231 (11/07/2023)

@bennor Thank you for the updated post, and info. I took your post and made it the initial post replacing my own, so all the major info is correct. If there is anything else I need to add / change let me know. Thanks

www.snbforums.com

Yeah it will depend on what firmware version they're running. Either Privacy or Policy.

 

[C3S4RM3W]

Sorry if I'm reviving an old thread, but I have followed the steps and installed the amtm module for this, but the exact same issue is still present, after a reboot the connection is down until I manually turn it off and back on.

I have also verified no QoS or AiProtection is enabled, and withdraw the privacy options.

 

[Tech9]

I have also verified no QoS or AiProtection is enabled, and withdraw the privacy options.

This is unrelated to your Dual WAN issues. Asus has to fix the code, it's broken for years.

 

[Ranger802004]

Sorry if I'm reviving an old thread, but I have followed the steps and installed the amtm module for this, but the exact same issue is still present, after a reboot the connection is down until I manually turn it off and back on.

I have also verified no QoS or AiProtection is enabled, and withdraw the privacy options.

Do you happen to have a NTP Server running on your router? I noticed sometimes that service is stuck and not ready and will prevent dual WAN to work.

 

[C3S4RM3W]

Do you happen to have a NTP Server running on your router? I noticed sometimes that service is stuck and not ready and will prevent dual WAN to work.

I don't and tried with and without, the same thing.

I managed to fix it by creating a script that runs at services-start and runs:
sleep 60
service restart_wan

No dual wan works in load balance every boot.

 

[Ranger802004]

I don't and tried with and without, the same thing.

I managed to fix it by creating a script that runs at services-start and runs:
sleep 60
service restart_wan

No dual wan works in load balance every boot.

Could you try the Dual WAN script again collecting debug logs and opening up a GitHub issue?

 

[Tdobb]

Hi all,

I have a new ASUS RT-AX86U Pro router - I am running it in Dual-WAN/Load-Balance mode.
I noticed that it does not have WAN Internet connectivity upon reboot/restart when running in this mode.
This issue is present in both the Merlin firmware as well as stock ASUS firmware and occurs ONLY when running the router in "Dual-WAN/Load-Balance" mode.

(See steps below to reproduce the problem and a workaround).

Upon rebooting the router, the devices can connect via WiFi and LAN to the router.
I can access the Web GUI of the router as well.
But the router does not have WAN Internet connectivity (web-browsing, ping, etc. does not work).
There is no indication of any error on the Web GUI either.

I have found a workaround for now.
Here are the steps to reproduce the problem and the workaround:

1. Login to the Web GUI of ASUS RT-AX86U Pro router.
2. Make sure that the router is configured in "Dual-WAN/Load-Balance" mode as follows:
WAN -> Dual WAN -> Primary WAN -> 1G WAN
WAN -> Dual WAN -> Secondary WAN -> 2.5G WAN
WAN -> Dual WAN -> Dual WAN Mode -> Load Balance
3. Ensure that both Primary and Secondary WAN are connected.
4. Reboot the router.
5. Upon reboot, connected devices will NOT have WAN Internet connectivity (i.e. you cannot ping or browse to any of the website on Internet) even though Web GUI shows all normal.
6. Login to Web GUI and Turn-OFF Primary WAN Internet Connection as follows:
Network MAP -> Primary WAN -> Internet Connection -> OFF
7. Wait about 10 seconds.
8. Now Turn-ON Primary WAN Internet Connection as follows:
Network MAP -> Primary WAN -> Internet Connection -> ON
9. Wait about 30 seconds.
10. All connected devices will now have WAN Internet connectivity.

This workaround is not feasible as a permanent solution as we all rely on the router to connect to Internet upon reboot.

Any and all help will be great appreciated. Thanks in adfance!

I would probably start with is your router connected to your own modem or the isp’s modem? I know with At&t there are steps needed to be completed to get the modem/router into true pass through mode. Mine was periodically disconnecting on the WAN because i didn’t turn off all of the firewall features on the isp’s gateway modem. Now between one subscription that gets 1200/40 and the other that get 1000/1000 i consistently get speeds that avg 1400 down and 800 up on a 1:1 load balance ratio with no disconnects or crazy jitter. Ping is between 11-15. But i had to make sure the isp’s equipment was truly bridged or it messed up everything.