newspaint

Documenting Problems That Were Difficult To Find The Answer To

Windows 10 TCP/Internet Slow With Chrome and OpenWRT Router

So I was having issues getting a Windows 10 laptop running Google Chrome connected via wifi to a router running OpenWRT Chaos Calmer 15.05.1.

The Windows 10 laptop would take a long time to establish a connection and then a long time for any data to transfer at an incredibly slow rate.

At first I thought it was Google Chrome but downloaded Firefox and was still having the same issues.

There are many proposed solutions but the commands that appeared to make a magical difference and instantly speed things up were:

netsh interface tcp show global
netsh interface tcp set global autotuning=disabled

At this stage things did not magically get better.

Then I tried:

netsh interface tcp show heuristics
netsh interface tcp set heuristics enabled

Now the Internet suddenly got quicker.

To undo these changes (if they don’t work for you):

netsh interface tcp set global autotuning=normal
netsh interface tcp set heuristics disabled

Also, because I messed around with the MTU on the WiFi interface I had to run the following to restore things to a relatively normal default:

netsh interface ipv4 set subinterface “WiFi” mtu=1458 store=persistent

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