Speedtest giving strange value

ZakM

Occasional Visitor
I noticed my router now has a Speedtest built into the WebUI and decided to give it a try.
Surprisingly, it's giving me the wrong value on download speed. I don't understand why.

if I test from my laptop going to speedtest.net, I get ~200Mbps download, 30Mbps upload, which is what I supposedly pay for.
But running a test on the router, it says it's ~19Mbps download, while upload is correct at ~30Mbps

RT-AC66U B1 on 386.3_2 S

Anybody ran into this issue?
 

ColinTaylor

Part of the Furniture
Do you have any VPN active? If so try disabling it or ensuring you've selected the correct interface.

Untitled.png
 

bertradio

Occasional Visitor
Are both tests using the same server? Different servers give different speeds.
 

ZakM

Occasional Visitor
Do you have any VPN active? If so try disabling it or ensuring you've selected the correct interface.
Yeah the test is not going thru the VPN (I also turned the client off), it's going thru WAN. And I chose the same server on both.

It's like it's showing 10% of the speed. Here's the results I just pulled:

1636490737487.png

vs:
1636490817246.png
 

bluepoint

Very Senior Member
Yeah the test is not going thru the VPN (I also turned the client off), it's going thru WAN. And I chose the same server on both.

It's like it's showing 10% of the speed. Here's the results I just pulled:

View attachment 37282
vs:
View attachment 37284
The speedtest relies on your CPU capacity at the time of the test, AC66U is not powerful enough so you will always get inconsistent slow speed. Try Whitesky Communication, that server gives me the fastest speed.
 

bluepoint

Very Senior Member
This is AC66U B1, or AC68U variant. It can do ~300Mbps speedtest with NAT acceleration disabled.
Yes, it's a single core CPU or maybe dual, I think it can achieve 300Mbps through a browser but not through the router's speedtest.
 
Last edited:

ZakM

Occasional Visitor
Yes, it's a single core CPU or maybe dual, I think it can achieve 300Mbps through a browser but not through the router's speedtest.
Well, that just isn't it.

Finally after a few hard restarts, this looks normal (showing basically the same results as from the client).
I don't know what it is, but feels like every now and then the router just decides to make everything bog slow, and nothing solves it but a restart.
Any QoS enabled?
Nope, no QoS
 
Last edited:

SomeWhereOverTheRainBow

Part of the Furniture
Well, that just isn't it.

Finally after a few hard restarts, this looks normal (showing basically the same results as from the client).
I don't know what it is, but feels like every now and then the router just decides to make everything bog slow, and nothing solves it but a restart.

Nope, no QoS
Do you have skynet enabled for filtering your outbound traffic?
 

TheMorpN

Regular Contributor
Don't know if there has been any update. But I have had the same issue every since I use skynet.

With skynet enabled, I get about 25% of my speed when I do a speedtest from my laptop. Once I remove skynet, I get the full speed again.

I've replicated this everytime on my installation. I've done a full factory reset and just installed skynet and have had the same results everytime.
 

hery

New Around Here
If you use AI Protection, then it might be because of it.
I had the same issue and now it works fine disabling it


You may also go to Administration > Privacy and withdraw
 

mashwell

New Around Here
Registered just because I had the same problem myself (recently purchased an used AC66U B1), but I figured out the cause:

It seems like HTTPS Web GUI is just too taxing for this device. I believe this feature was introduced by ASUS around mid-last year.
I was capped to around ~30mbps speeds over WiFi previously, too.

If you log out from the GUI, the speed test results should return to normal. Disabling HTTPS and reverting back to HTTP Web GUI should work, too.
If I recall correctly, only WLAN speeds are affected; LAN <=> WAN speeds should be similar even with HTTPS Web GUI on.

Hope this helps!
 

TheMorpN

Regular Contributor
Registered just because I had the same problem myself (recently purchased an used AC66U B1), but I figured out the cause:

It seems like HTTPS Web GUI is just too taxing for this device. I believe this feature was introduced by ASUS around mid-last year.
I was capped to around ~30mbps speeds over WiFi previously, too.

If you log out from the GUI, the speed test results should return to normal. Disabling HTTPS and reverting back to HTTP Web GUI should work, too.
If I recall correctly, only WLAN speeds are affected; LAN <=> WAN speeds should be similar even with HTTPS Web GUI on.

Hope this helps!
Thanks, however, I have done all this as well and my speed test results are not really affected. It does not matter if I enable or disable HTTPS, it seems that if I user skynet, then my speedtest results are about 25-30% of what I usually have.

I thought that the GUI on the router would be the issue, but even if I go to another PC, and run a test from speedtest directly, the results are the same. THe moment that I uninstall skynet, then my speedtests results are back to normal, both in the router GUI and directly on the speedtest website.
 

Wisiwyg

Senior Member
Skynet will slow things down. You can set Skynet to monitor incoming traffic only (Opt 11, opt 4) and use a filtering DNS to block adds and malicious sites. I have 3-4 go-to test sites in the region that I try for the UI speedtest. Invariably, 1 or 2 will give me a reading of full throughput and the others will be bogged down with traffic.

Here's a pic of my setup on a Comcast 1.2gb/40mb service.
The first test @ 8:44am is with a good regional provider.
The second test @ 8:45 is with another good provider, giving full throughput. With Skynet monitoring incoming traffic only. No changes to anything other than selecting a different regional test point.
The third test @ 8:49 is with the same provider as test 2, but with Skynet incoming and outgoing traffic monitoring turned on. Waited a minute or two for Skynet to 'come up' between tests. Notice jitter...

1642434630108.png


The Router settings didn't change at all except for selecting a regional provider and enablling Skynet outgoing traffic monitoring.

I suggest that you try several test servers due to the possibility that the first one you've tried may be under heavy load for some reason before digging into problems with the router.
 

TheMorpN

Regular Contributor
Skynet will slow things down. You can set Skynet to monitor incoming traffic only (Opt 11, opt 4) and use a filtering DNS to block adds and malicious sites. I have 3-4 go-to test sites in the region that I try for the UI speedtest. Invariably, 1 or 2 will give me a reading of full throughput and the others will be bogged down with traffic.

Here's a pic of my setup on a Comcast 1.2gb/40mb service.
The first test @ 8:44am is with a good regional provider.
The second test @ 8:45 is with another good provider, giving full throughput. With Skynet monitoring incoming traffic only. No changes to anything other than selecting a different regional test point.
The third test @ 8:49 is with the same provider as test 2, but with Skynet incoming and outgoing traffic monitoring turned on. Waited a minute or two for Skynet to 'come up' between tests. Notice jitter...

View attachment 38665

The Router settings didn't change at all except for selecting a regional provider and enablling Skynet outgoing traffic monitoring.

I suggest that you try several test servers due to the possibility that the first one you've tried may be under heavy load for some reason before digging into problems with the router.
Interesting.. I never thought of just blocking inbound connection using Skynet. I'm using Diversion as well, so it should be all good.

I just tried blocking inbound connections, and my speed is is pretty much what I pay for my internet plan of 400Mbs/50Mbs. Well, if I use the GUI, it is a bit less, but if I use another PC and connect dirrectly to Sppedtest.net, I get:

1642441247179.png
 

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