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Please try 384.13 and see if this will fix your Gest wifi issue. It seems to me that a defect on the Guest WiFi was introduced after 384.13 which been inherited in subsequent releases.

What version of Merlin are you using in your router? In my tests, I only managed to get a stable Guest network on version 384.13 as reported by and full credit to psychosb. You might try a different version in your router to see if your problem is related to a specific version. I have tested...

Thanks for your suggestion. Since 384.13 works for me, I am going to leave this router running 384.13 and my other AC88U running the stock firmware from Asus. I only downloaded Merlink for this router to allow me to have greater selection/control on the VPN Client routing since the stock...

I have tested with smart connect enabled and disabled. Similar results! Thanks

Have try running an earlier version to see if that will cure your Guest network woes? I suggest trying 384.13 to see if it will cure your issues

Yes, I did that the full reset thing. Even avoided restoring the settings and instead reconfigured the router after a hard reset from scratch. Didn't work for me. But not a losing battle, because xxx.13 works for me, but not newer versions.

One day later cannot log into Asus-Guest due to invalid password issues. Will be downgrading back to 384.13_0 at my earliest opportunity.

Upgraded to 384.17 and so far no issues with Asus-Guest as the guest SSID. Will continue to monitor this and repeat the tests using another AC88U router with 384.17.

So 384.13_0 has been working flawlessly with Asus-Guest as the guest SSID since 28 April. Will update the firmware to see if it continue to work flawlessly with Asus-Guest as the guest SSID.

Thank you for your insights on this. I have tried with smart connect on and off to no avail. It is early days yet, but in my experiment using a verified functioning AC88U on stock firmware upgraded to xxx.13 than xxx.17, all seems to be working - even after I restored the configuration on this...

Yes sometimes - when the desired state cannot be achieved.

I didn't mean to infer it has anything to do with you, but merely the fact that it remains a mystery why there is an issue with Asus-Guest SSID when this works on stock firmware in all several AC88U routers? Changing the Guest SSID is not the desired state for me.

Thanks. You are not me and I am not you. So obviously our needs are different and our approaches to problem solving would be different. Appreciate your input though. The world is richer with diversity.

Thank you for your clarification. I am trying to verify if there is an issue with the firmware, my setup or the router, so I am using a second known to have working Guest network on stock firmware to change over to Merlin in a structured approach by first using 384.13 since this was...

Yes, I have used Asus-Guest before but not Asus-Guest2. Anyway I have verified that Asus-Guest3 works perfectly on stock firmware on another Asus AC88U. Just flashed it with xxx.13 to verify that Asus-Guest3 still works before re-flashing with xxx.17.

Sadly the problem with the Guest network appeared coincidentally or not after I uploaded Merlin 834.16 and remained with 834.17. I will revert to 834_13 as mentioned by another forum member before reverting to stock Asus firmware if that doesn't fix my Guest network issues.

DTIM is already set to a 3 unfortunately (or should I say fortunately) but yet the problem with the Guest network persists.

Changed the Guest SSID from Asus-Guest to Asus-Guest2 to no avail. Nothing special about the password just Upper and lowercase characters and numbers, no special characters etc to deal with. Same problem!

Thanks for the confirming the availability of 384.17. Does this version fixes the Guest Password issues or only the header issue to allow the firmware to be updated without errors being reported?

I have using version 384_16_0 as my first foray into using Merlin to give me more control on the IP routing via the VPN Client. I too have noticed that the Guest Network 'loses' its Password after a while. I have downloaded 384_13_0 but struggling to upload this to my AC88U as it keeps...