Asus RT-AX86U Pro WiFi Speeds

[sedalbis]

I have Sky Gigafast FTTP. My setup is the Openreach ONT on the wall to an Asus RT-AX86U Pro router. I have 2.4GHz and 5GHz separated, with separate SSIDs.

Been consistently getting 900Mbps download over 5GHz WiFi while in the same room as the router, however, yesterday I had to unplug the router, and ever since turning it back on I'm only getting 500Mbps over the 5GHz WiFi. No amount of reboots have fixed it.

Still getting over 900Mbps wired, it's just the WiFi that has slowed down. Have changed no settings whatsoever.

Have done a WiFi scanner analyser, and there is nothing else close by using the same channel (set to auto and currently on channel 100).

Any ideas? Thanks in advance.

[Chrisee]

@sedalbis given the ONT is delivering the correct speed to the hub as demonstrated by the ethernet speeds the issue is with your router or device. To get 900Mb/s over Wifi would require a Wifi6 connection so both the device and the router have to support wifi6. 500Mb/s sounds like the speed a wifi5 connection would provide.

[sedalbis]

Nope, it's a WiFi 6 router and the device I am using to test the speed is WiFi 6 compatible and is connected via WiFi 6. As I said, it was working fine before I rebooted the router.

[cuke]

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@sedalbis wrote:

I have Sky Gigafast FTTP. My setup is the Openreach ONT on the wall to an Asus RT-AX86U Pro router. I have 2.4GHz and 5GHz separated, with separate SSIDs.

Been consistently getting 900Mbps download over 5GHz WiFi while in the same room as the router, however, yesterday I had to unplug the router, and ever since turning it back on I'm only getting 500Mbps over the 5GHz WiFi. No amount of reboots have fixed it.

Still getting over 900Mbps wired, it's just the WiFi that has slowed down. Have changed no settings whatsoever.

Have done a WiFi scanner analyser, and there is nothing else close by using the same channel (set to auto and currently on channel 100).

Any ideas? Thanks in advance.

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Have you tried resetting the Asus to factory then just putting back in the Sky connection settings?

[sedalbis]

Nope, will give that a try tonight, thanks!

[TomThumb5ive]

@sedalbis  it's not uncommon for a pro router to need a few Hrs to settle down after a setting change,

even a reboot could trigger some fine tuning sub routine, so treat any benchmarks accordingly.

With a few hours uptime now, can you confirm the

channel bandwidth is set as required ?

Attainable Throughport ?

Tom...

[sedalbis · Accepted solution]

Hi all, managed to fix this. 

I turned off DFS Channels in the router settings and now the speed over WiFi is back to 900Mbps 🙂

[Terf]

Hi

I have just purchased this router. 

Did this fix continue to work for you? 

Thanks 🙂

[TeamWork]

Turn off QOS on the Asus rooter settings - it's trying to allow everything a fair share of your network, but it throttles maximum download speeds in the process (in my non-professional experience) I went from everything maxing out at c. 500mb/s to 700-900 on certain devices just buy switching it off. 

it might prove better to turn it back on in the future but I cant imagine my network traffic is that busy. 

[AO89]

Hi, bumping this thread as I have recently changed to Gigafast though for some reason it has knocked my ASUS RT-AX86U Pro out of sync. 
Upload speeds are not exceeding past 2mb and download's of 100mps. 

Tried multiple resets and clean set up's but I am at a total loss in terms of the advance settings to optimise this again. 
Same set up as OP though I did not have 2.4GHz and 5GHz separated, with separate SSIDs.

Any help on the settings would be appreciated, 

[JimM1]

@AO89 Changed from what to gigafast?

[AO89]

Sky Ultrafast Pro to Gigafast 

[JimM1]

@AO89 Via a sky hub or direct connected, take it you have no asus backup for it?

[AO89]

@JimM1 It is directly connected into the OpenReach box on the wall. There isnt a back up no, the asus was acting as the only router 

[JimM1]

@AO89 You have not taken a system backup of the Asus, is that what you mean, or are you talking about physical extra router?

I am talking about the first, backup off the asus in case you oops it!