Solved Stumped - Forum newbie with RTAX86U

[Beth]

I have been using a RT-AX86U successfully in dual WAN mode with Charter Spectrum and TMobile home internet for over a year. Last Saturday, 11/26/22, I pulled out the TMobile router to test at my brother's. Last Sunday, 11/27/22, I turned off dual WAN mode, the RT-AX86U rebooted, and the Charter Spectrum connection did not come back up. I made NO other ASUS router changes. I contacted Charter and that was no help. I had an old Netgear single WAN router that I connected to the TMobile home internet router, so I could bring up my home and office network on TMobile.

I restored the ASUS to factory default and created new wireless networks for troubleshooting and testing the Charter connection. The configuration on the ASUS router is simple and I am running the factory OS (not Merlin). The ASUS router has been intermittently reporting problems with DHCP on the Charter connection, which is consistent with what I observe on my Win11 Lenovo laptop (no changes with laptop config). See attached screen snap shots. However, there are times when the ASUS must have a Charter Spectrum internet connection because I can perform a speed test from the router interface, but there is no internet connection at the client, either wired or wireless.

I've had the Charter Spectrum modem for several years, so I decided to get it replaced to eliminate hardware gremlins. I connected and activated a new Charter Spectrum modem, yesterday, 12/02/22. ASUS was reporting the DHCP error and I did some research. I've changed the ASUS DHCP frequency setting from Continuous to Normal, based upon something I read about Charter Spectrum ignoring DHCP requests, if they are too frequent.

I truly am stumped on what to do next. BTW, I have intermediate level knowledge of networking, but it's been years since I've been hands on in any environment besides my home network. TIA for any advice!

 

[Tech9]

Dual WAN feature doesn't work reliably on Asus routers. There is a custom script addressing the issues:

Dual WAN Failover Script

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

About your connection issue - many had similar issues with different ISPs. Try disabling Network Monitoring in Administration, System.

 

[Beth]

Dual WAN feature doesn't work reliably on Asus routers. There is a custom script addressing the issues:

Dual WAN Failover Script

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

About your connection issue - many had similar issues with different ISPs. Try disabling Network Monitoring in Administration, System.

Thanks! I should have included that I have been using Dual WAN in Load Balance Mode, but will definitely check out the script. Now is probably the time to start using the Merlin firmware.

 

[Beth]

Thanks! I should have included that I have been using Dual WAN in Load Balance Mode, but will definitely check out the script. Now is probably the time to start using the Merlin firmware.

UPDATE: It appears I had more than one issue with my connection. My Charter Spectrum cable signal was apparently too high, so a Charter tech put some splitters on the line to normalize the signal. I think I also had some ASUS configuration issues. I took the opportunity to load the Merlin firmware, fixed the config issues and I am back in service with dual WAN load balance mode.

 

[JS_racer]

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I've had the Charter Spectrum modem for several years, so I decided to get it replaced to eliminate hardware gremlins. I connected and activated a new Charter Spectrum modem, yesterday, 12/02/22. ASUS was reporting the DHCP error and I did some research. I've changed the ASUS DHCP frequency setting from Continuous to Normal, based upon something I read about Charter Spectrum ignoring DHCP requests, if they are too frequent.

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say, can you share what modem you received ?? mine is a few years old as well, thanks