AX86U losing Wan connection

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clvk07

Senior Member
Hi

Seems the router is losing Wan connection quite often. (every 7 - 10 days). Running latest Merlin.

Router is connected to Virgin Media Modem in bridge mode. When It happens I can see this in the modem log:

30-05-2021 17:24:56criticalNo Ranging Response received - T3 time-out;CM-MAC=XX:XX:XX:XX:XX:XX;CMTS-MAC=00:XX:XX:XX:XX:XX;XX-QOS=1.1;CM-VER=3.0;

Rebooting the Asus fixes the issue. Any ideas?
 

clvk07

Senior Member
Hi

Seems the router is losing Wan connection quite often. (every 7 - 10 days). Running latest Merlin.

Router is connected to Virgin Media Modem in bridge mode. When It happens I can see this in the modem log:

30-05-2021 17:24:56criticalNo Ranging Response received - T3 time-out;CM-MAC=XX:XX:XX:XX:XX:XX;CMTS-MAC=00:XX:XX:XX:XX:XX;XX-QOS=1.1;CM-VER=3.0;

Rebooting the Asus fixes the issue. Any ideas?

Just happened again noticed that firewall is still blocking inbound connections so there is internet connection but wan still down according to wan status
 

HTBruceM

Regular Contributor
I believe that log message refers to an issue on the other side of your cable modem - i.e. something is becoming marginal upstream from your modem. I would call your ISP and have them run some remote diagnostics, they should be able to determine the quality of your signal. It could be anywhere within your home's RG6 coax cabling and out to the nearest cable amplifier.
 

HTBruceM

Regular Contributor
Just happened again noticed that firewall is still blocking inbound connections so there is internet connection but wan still down according to wan status
Have you had any luck getting this fixed? If/when you do, post your findings here for the benefit of others who might have the same problem someday.
 

clvk07

Senior Member
Have you had any luck getting this fixed? If/when you do, post your findings here for the benefit of others who might have the same problem someday.
I fixed the issue by setting dhcp frequency to continuously and change both TTL values settings to NO in the wan page setting. I also changed the redirect wan browser to yes in the admin page. Now if I get a wan drop from the isp, the ASus always reconnects the wan. Previously it required a reboot most of the times. I see other wan drop threads , this might be worth to try for people having the issue.
 

Kanji-San

Regular Contributor
I fixed the issue by setting dhcp frequency to continuously and change both TTL values settings to NO in the wan page setting. I also changed the redirect wan browser to yes in the admin page. Now if I get a wan drop from the isp, the ASus always reconnects the wan. Previously it required a reboot most of the times. I see other wan drop threads , this might be worth to try for people having the issue.
I am glad you found a setting that works with your ISP. Unfortunately, there are many reasons why the WAN connection is dropped. Changing the DHCP frequency might work for some when the ISP has an unusual DHCP behavior but it does not help in many other situations such as most of the threads you have seen. It is definitely worth a shot, though.
 

clvk07

Senior Member
I am glad you found a setting that works with your ISP. Unfortunately, there are many reasons why the WAN connection is dropped. Changing the DHCP frequency might work for some when the ISP has an unusual DHCP behavior but it does not help in many other situations such as most of the threads you have seen. It is definitely worth a shot, though.

ttl settings to No is the most important change I think
 

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