Can you authenticate with your ISP with PPPoE ? If yes give it a try...

Is the 4011 running the latest ROS 6.46.5 ?
Is the configuration the default one or not ?

However, Laptop directly on the RB4011iGS+RM ether2 with cable-modem on ether1 and the "default" router config, I cannot get more than 200 - 230MBps of download speed.

On my first post I said it was running the default config.

On my first post I said it was running the default config.

I asked so that i be sure you have not run Quickset 10 times above the default config or made any changes...
4011 is a powerful router and can Route traffic a lot higher than the one you report... Most probably something else causes this issue...

Using WinBox make a Supout.rif package and copy it off to your computer.
Go to System/Reset Configuration and select "No Default Configuration". Click on "Reset Configuration".
After Router reboots, go to System/Reset Configuration and don't select any options then click on "Reset Configuration".
After the router reboots again test the router speed.

Using WinBox make a Supout.rif package and copy it off to your computer.
Go to System/Reset Configuration and select "No Default Configuration". Click on "Reset Configuration".
After Router reboots, go to System/Reset Configuration and don't select any options then click on "Reset Configuration".
After the router reboots again test the router speed.

For me the problem is the double NAT...

When already natted traffic goes an other time through a NAT.

https://medium.com/@gmanual/double-nat- ... 41b6c651bd
https://www.pcworld.com/article/3175739 ... blems.html

I don’t see this condition in my setup.

Cable modem is a Technicolor TC4400-AM

I don’t see this condition in my setup.

Then sorry but you don't know what double NAT is...
Yes there is double NAT in your setup...

Internet -> ISPs Router does NAT -> RB4011 Does NAT -> Computer

Cable modem is a Technicolor TC4400-AM

This is a Modem/Router....

Well, I do not consider the double-nating from the modem/router. It depends on which mode it has been setup.

Well, I do not consider the double-nating from the modem/router. It depends on which mode it has been setup.

Ok let us know then what is the mode it has been setup...
So what you are telling me is that your RB4011 holds a Static or Dynamic Public IP right ? Since you say there is no NAT happening in your ISPs Router...
You get an address through DHCP client which is in the form x.y.z.w/b , what are the x,y numbers ?

Did You look into the WAN ethernet stats, of the 4011? If a dumb switch change things, maybe we can see errors on the ethernet layer...

Did You look into the WAN ethernet stats, of the 4011? If a dumb switch change things, maybe we can see errors on the ethernet layer...

Could you tell me what to look for in the stats of ETH1 ? I never done this kind of deep debuging.

Did You look into the WAN ethernet stats, of the 4011? If a dumb switch change things, maybe we can see errors on the ethernet layer...

Could you tell me what to look for in the stats of ETH1 ? I never done this kind of deep debuging.

From CLI:
/interface ethernet print stats from=ether1

From webfig:
Open the ethernet interface page, and scroll down. Bellow "Overall Stats" You will find "Rx Stats" and "Tx Stats". There You will find the counters, with errors, if any.

From Winbox:
Interfaces -> ether1
Look into the tabs "Rx Stats" and "Tx Stats".

We are looking for errors, such as drops, overruns, collisions, etc.

Connect the 4011 directly to the modem. Take a look at the numbers first. Run the speed test. Take a look again at the numbers. Compare them. This will tell us if we have some problem at the ethernet layer.

I still need to figure why Chrome on my desktop caps at 200mbps though.

I still need to figure why Chrome on my desktop caps at 200mbps though.

So you found out that speedtest tests speed of the browser as well

You can check if chrome happens to consume more CPU during tests ... or if it's running on single CPU core (whereas other browser runs on multiple) during test ...

Just did that. and surprisingly, I now get 400mbps and no error on the ethernet layer.
I am dumbfounded.

I still need to figure why Chrome on my desktop caps at 200mbps though.

After 4 consecutive speed test.

Just did that. and surprisingly, I now get 400mbps and no error on the ethernet layer.
I am dumbfounded.

I still need to figure why Chrome on my desktop caps at 200mbps though.

After 4 consecutive speed test.

That's weird. Well, glad to hear it works now. I have no idea about what could be causing this browser behavior though.

i don't want to open new topic. so. is it better 4011 with integrated wifi or 4011 without wifi and with cap ac in capsman? thanks