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Dual wan not switching back to primary

joeejo

Occasional Visitor
Equipment: RT-AX6U PRO
Firmware: Asus Merlin 3006.102.7_2

I have two internet connections, the primary is AT&T air and the secondary is Centurylink DSL. I have set up the router with dual wan, AT&T primary and Centurylink as hot standby. The AT&T connection loses connectivity occasionally in the middle of the night, which appears to be a common issue with AT&T, and the reason I maintain a backup isp. When this happens, the router quickly and properly switches to the hot standby connection, however, when the primary (AT&T) regains connectivity, it does not switch back. I have to manually disconnect the DSL connection to force the router to switch back to the primary. After that all is well until the next connection drop by AT&T, and the senario repeats.

Can someone advise me what I might be have set incorrectly that is preventing the auto return to the primary wan when connection is reestablished?

Thank you
 

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  • router dual wan 2026-04-15 103039.png
    router dual wan 2026-04-15 103039.png
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Failback has to be enabled, but test after. ASUS Dual WAN feature is not very reliable, as some say YMMV.
 
Maybe this will work better?
 
Maybe this will work better?
Thank you I will give it a try.
 

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