Windows 10: Windows 10, 10gbe connection slow transfer, DefaultSendWindow / tcp

Hey

I did a bit of research on this matter and I'm pretty sure I have narrowed it down to windows DefaultSendWindow being set too low for modern networks.

Where can I edit this setting in windows to force a different tcp buffer length size.

I found this on internet TCP Window size problems


and this in that post
You can do that by editing the registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AFD\Parameters\DefaultSendWindow

But this is empty on my end and I don't know what values I should put in to configure that.

A more 10gbe related topic on this I have posted on this forum, in case any1 is interested.
10gb SFP + network setup - slow windows TCP Transfer - Spiceworks

From my tests over there you can see that the windows is the issue of slow transfer speeds and not hardware/zfs/freenas.

Regards


:)

 

Windows 10 - Extremely slow WIFI

Hi Joanne,

There are a lot of possible causes for this issue to occurred. And since
resetting your TCP/IP
did not work. We suggest that you
Reconfigure your TCP/IP
and check if there's any changes.
To do this, follow these steps:

• 
  Run
  Command Prompt
  as
  Administrator.
  
• 
  Run
  these following commands:
  
  • 
    netsh
    int
    tcp set heuristics
    disabled
    
  • 
    netsh
    int
    tcp
    set global
    autotuninglevel=disabled
    
  • 
    netsh
    int
    tcp set global
    rss=enabled
    

Let us know how it goes.

Regards.

 

Cortana Won't Connect

Hi,

To better assist you, what are the troubleshooting steps have you done so far? Have you tried
resetting and re-configuring
your
TCP/IP Settings? If not, we suggest that you do so. Kindly perform these
methods of troubleshooting and check if Cortana can connect to the internet after performing these methods:

Method 1: Reset TCP/IP

To do this, follow these steps:

• 
  Run
  Command Prompt
  as
  Administrator.
  
• 
  Run
  this command:
  
  • 
    netsh int ip reset
    and hit
    Enter.
    

Exit
Command Prompt
and
monitor your Network Connection.

Method 2:
Reconfigure TCP/IP

To do this, follow these steps:

• 
  Run
  Command Prompt
  as
  Administrator.
  
• 
  Run
  these following commands:
  
  • 
    netsh int tcp set heuristics
    disabled
    
  • 
    netsh int tcp
    set global autotuninglevel=disabled
    
  • 
    netsh int tcp set global
    rss=enabled
    

Update us on how it goes.

Regards.

 

Windows 10 - WIFI 2 - Cant connect

Hi
Myamara,

It is possible that your drivers are outdated or the connection itself has the issue. We suggest that you perform
these methods of troubleshooting
and check if there are any changes:

Method 1: Reset TCP/IP

To do this, follow these steps:

• 
  Run
  Command Prompt
  as
  Administrator.
  
• 
  Run
  this command:
  
  • 
    netsh int ip reset
    and hit
    Enter.
    

Exit
Command Prompt
and
monitor your WiFi connection.

Method 2: Disable auto turn-off of WiFi device.

Go to
Network and Sharing Center. At the
right pane, click
Change adapter settings.
Right-click
on your
connection name(WiFi name)
and go to
Properties.Click
the
"Configure..."
button and go to
Power Management
tab.Uncheck/disable
the
radio button
for
"Allow this device to turn off this device to save power". And then,
Restart the PC(Important).

Method 3: Reconfigure TCP/IP

To do this, follow these steps:

• 
  Run
  Command Prompt
  as
  Administrator.
  
• 
  Run
  these following commands:
  
  • 
    netsh int tcp set heuristics
    disabled
    
  • 
    netsh int tcp
    set global autotuninglevel=disabled
    
  • 
    netsh int tcp set global
    rss=enabled
    

Update us on how it goes.

Regards.