- Jul 3, 2016
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Hi everyone, a few weeks ago I did post some thing here regarding Asus's Aimesh problem, Mod moved it to somewhere else, here is the link
However, for this post, I will just simply give a solution for the problem. Before we start, I just want let you know that this problem may not happen to all Asus routers, and you need a phone app called "WIFI Analyzer", which is a fee app you can down load from google store to check if the job is done or not. And also, this solution can only work out the problem with ehternet backhual mode, which means that your primary router need to connect your mesh units with ethernet, rather than wireless since I did not test it with wireless backhual mode, nevertheless if you had similar problem you can still have a try.
If you are using Asus RT-AX89X as the primary router and other Asus routers that supports wifi 6 160MHZ mode, there is a high chance that you found out that both your primary router and your mesh units back to 80MHZ mode. If you are not sure about that, please use wifi analyzer to check this out. Once that happens, here is a few things you need to do:
1. go to your primary router, RT-AX89X, click the number after "Firmware Version" and follow the instruction there to update your firmware, inlucidng your mesh units.
2. After upgarding the firmware, disconnect all the mesh units, go to wireless setting-professional---choose 5G band,and scroll down, you can see there is a selection says "Extended NSS", disable it,click apply. Then go back to wireless- general-scroll down to 5G setction,unselect and select enable 160MHZ, then you will found the selection of 20/40/80/160mhz is back. click apply.
3.Use your wifi analyzer to scan the wifi, to check if 160MHZ mode is on on your primary router, please notice that for 5G band, only those control channel from 36 to 64 supports 160MHZ mode, thus, if you found your wifi channel is already more than 64, then, no matter what happen you just can not enable 160MHZ mode. In this case, you have to check the wifi eviroment to found out the best channel then apply to the router, ,Eg, you found your neighbours are using channel 36 40 48, then you go back your router, set your wif router's control channel to 52 or even 60 and make sure the channel that you are using is used by no one else. If all those control channels that is <= 64 are used, then you check out the weakest one, choose the control channel, click apply.
4.Plug the ethernet connection of your mesh units back. Go back to your primary router setting managment page, Go aimesh section on the top left, choose the mesh units, please notice that it may take a few mins before those mesh units can back online, so if you found out all your mesh units are still off line, don't be suprised, choose one mesh unit, go management on the right, scroll down, choose Reboot Node. Then go other Mesh unit, reboot them one by one. Then wait for a few seconds, after that use your wifi anlayzer to check out if all your mesh units are working on 160MHZ mode. Please also notice that based on my experience, physically restart the mesh units, by turn it on and off might not work, you have to do it this way.
5. After you done all this, you can go back to your primary router to check the wireless setting. On the wireless-general-5G section, you will found out that this page looks like this
View: https://imgur.com/fi6kZiY
However, by unselect and select enable 160MHZ, the choice of 160mhz and 20/40/80/160MHZ will jump out but once you clieck apply, it will go back to where you start from. Yet it does not matter, 160MHZ mode will be still on.
I hope this can help you if you have problem like this.
However, for this post, I will just simply give a solution for the problem. Before we start, I just want let you know that this problem may not happen to all Asus routers, and you need a phone app called "WIFI Analyzer", which is a fee app you can down load from google store to check if the job is done or not. And also, this solution can only work out the problem with ehternet backhual mode, which means that your primary router need to connect your mesh units with ethernet, rather than wireless since I did not test it with wireless backhual mode, nevertheless if you had similar problem you can still have a try.
If you are using Asus RT-AX89X as the primary router and other Asus routers that supports wifi 6 160MHZ mode, there is a high chance that you found out that both your primary router and your mesh units back to 80MHZ mode. If you are not sure about that, please use wifi analyzer to check this out. Once that happens, here is a few things you need to do:
1. go to your primary router, RT-AX89X, click the number after "Firmware Version" and follow the instruction there to update your firmware, inlucidng your mesh units.
2. After upgarding the firmware, disconnect all the mesh units, go to wireless setting-professional---choose 5G band,and scroll down, you can see there is a selection says "Extended NSS", disable it,click apply. Then go back to wireless- general-scroll down to 5G setction,unselect and select enable 160MHZ, then you will found the selection of 20/40/80/160mhz is back. click apply.
3.Use your wifi analyzer to scan the wifi, to check if 160MHZ mode is on on your primary router, please notice that for 5G band, only those control channel from 36 to 64 supports 160MHZ mode, thus, if you found your wifi channel is already more than 64, then, no matter what happen you just can not enable 160MHZ mode. In this case, you have to check the wifi eviroment to found out the best channel then apply to the router, ,Eg, you found your neighbours are using channel 36 40 48, then you go back your router, set your wif router's control channel to 52 or even 60 and make sure the channel that you are using is used by no one else. If all those control channels that is <= 64 are used, then you check out the weakest one, choose the control channel, click apply.
4.Plug the ethernet connection of your mesh units back. Go back to your primary router setting managment page, Go aimesh section on the top left, choose the mesh units, please notice that it may take a few mins before those mesh units can back online, so if you found out all your mesh units are still off line, don't be suprised, choose one mesh unit, go management on the right, scroll down, choose Reboot Node. Then go other Mesh unit, reboot them one by one. Then wait for a few seconds, after that use your wifi anlayzer to check out if all your mesh units are working on 160MHZ mode. Please also notice that based on my experience, physically restart the mesh units, by turn it on and off might not work, you have to do it this way.
5. After you done all this, you can go back to your primary router to check the wireless setting. On the wireless-general-5G section, you will found out that this page looks like this
View: https://imgur.com/fi6kZiY
However, by unselect and select enable 160MHZ, the choice of 160mhz and 20/40/80/160MHZ will jump out but once you clieck apply, it will go back to where you start from. Yet it does not matter, 160MHZ mode will be still on.
I hope this can help you if you have problem like this.
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