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ASUS RT-AC86U Capping Download Speeds (Ethernet Only), help fixing please.

vamosuk
By vamosuk
in Networking
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Posted

Hi so basically I have had the RT-AC86U for a while now and its been pretty good helped me out a lot.

 

Although its now started to cap my download speeds with ethernet not through the WIFI signal of the router.

 

Basically I pay for 1000mbps and I get around 950mbps when all is working fine on ethernet but recently it has been doing an issue where it just caps itself at 80/90mbps through the ethernet. It used to do this but I found it was when it needed a router firmware upgrade it would do it so upgrading the firmware fixed it. But now a days it just does it without a firmware upgrade being available.

 

I can fix this however by restarting the router but this happens so often that its not viable to keep doing it.

 

I have turned QoS off as this caused similar issues in the beginning and also turned the firewall off but I have no idea why it keeps doing it or how to fix it permanently. 

 

This only happens for download speeds also the upload speed always stays the same as I get whenever.

 

 

 

TLDR:

Router caps download speed randomly, can fix with a restart of router but not viable and want a more permanent fix if possible.

 

Thank you anyone that can help!

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Posted

Dropping to 90ish is right at the limit of a 100mb/s interface. Are you sure it's not downgrading your ethernet line due to cabling issues? Check your negotiated speed next time this happens.

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  • 2 weeks later...
Posted
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On 6/24/2022 at 5:41 PM, Kid.Lazer said:

Dropping to 90ish is right at the limit of a 100mb/s interface. Are you sure it's not downgrading your ethernet line due to cabling issues? Check your negotiated speed next time this happens.

Hi so basically it goes up and down, will always go back to normal right after a restart of the router.

 

I have just reset my router to factory defaults and now it is back to 100mbps.

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