Windows 10: Can TCP Chimney Offload and NETDMA be enabled at a same time in windows 10?

I have recently referred to this article -> https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/gg162716v=ws.10?redirectedfrom=MSDN .In this article, there is given description about NETDMA. There is also some requirements to use NETDMA.Like;Requirements for NetDMANetDMA must be enabled in BIOS.CPU must support Intel I/O Acceleration Technology I/OAT.You cannot use TCP Chimney Offload and NetDMA together.I am confused with third requirement You cannot use TCP Chimney Offload and NetDMA together. As, In my windows both NETDMA and TCP

:)

 

An Update on Windows TCP AutoTuningLevel

Some of the confusion may have originated from a misinterpretation of a blog post which suggests disabling heuristics with the following command:

Code:

Code:

netsh interface tcp set heuristics disabled

Heuristics is a feature that can interfere with auto-tuning and disabling it can improve Internet speeds and in fact heuristics have already been disabled in Windows 8.1 and greater. Auto-Tuning on the other hand should NEVER be disabled.


Source: An Update on Windows TCP AutoTuningLevel | Networking Blog

 

What's holding me back from 100% utilization?





netsh int tcp set global autotuninglevel=disabled
netsh int tcp set global congestionprovider=ctcp
netsh int tcp set global ecncapability=enable
netsh int tcp set global chimney=enabled
netsh int tcp set global dca=enabled
netsh interface ipv4 show subinterface

C:\Windows\system32> netsh int tcp show global
Querying active state...

TCP Global Parameters
----------------------------------------------
Receive-Side Scaling State : enabled
Chimney Offload State : enabled
NetDMA State : enabled
Direct Cache Acess (DCA) : disabled
Receive Window Auto-Tuning Level : disabled
Add-On Congestion Control Provider : ctcp
ECN Capability : enabled
RFC 1323 Timestamps : disabled

I believe it's a physical limitation of my drive speeds, just curious if anybody else has some thoughts.

My throughput test shows I can do about 670mbps which is equal to about 67% but im getting around 75% utilization so I don't really trust it.

Currently a Airport Extreme > 30m cat5e > Netgear gig switch > PC

 

Extremely slow VPN connection between Windows 10 client and Windows 2008 R2 Server

After a bit of hassle setting up and configuring my VPN connection on Windows 10, I finally got it connecting to our Windows 2008 R2 server using RRAS.

When establishing the connection, it connects extremely quickly, but upon connecting to file shares, browsing is slow and opening/transferring files can be painfully slow.

Below are some of my current settings on both the Client and Server. If anyone has any ideas on how to potentially decrease lag in the connection I'd appreciate it.

Questions:
Can/should I tweak TCP settings on the server?
Can/should I tweak settings on the client(s)?

Current Server Settings (Win Server 2008 R2):

• TCP Window Auto-Tuning: normal
  
• Windows Scaling Heuristics: disabled
  
• Congestion Control Provider: ctcp
  
• RSS: enabled
  
• TCPA: enabled
  
• DCA: disabled
  
• TTL:
  
• ECN Capability: disabled
  
• Checksum Offloading: default: n/a
  
• TCP Chimney Offload: automatic
  
• TCP1323 Options:
  
• Window Scaling: unchecked
  
• Timestamps: unchecked
  

Current client Settings (Win 10):

• TCP Window Auto Tuning: normal
  
• Windows Scaling Heuristics: disabled
  
• Congestion Control Provider: ctcp
  
• RSS:
  
• RSC:
  
• DCA:
  
• TTL:
  
• ECN Capability: disabled
  
• Checksum Offloading:
  
• TCP Chimney Offload:
  
• LSO:
  
• TCP 1323 Timestamps: disabled
  

Things I have tried:

• Turning on Window Scaling
  
• Disabling Offloading features (TCP/RSS/Chimney)
  

I'm new to VPN connections, so any help would be appreciated, or if there are any tests that I should run on the connection please let me know.