Windows Server 2016 SMB performance on LAN

  • Last Post 09 March 2023
Daniel O'Brien posted this 21 February 2023


We have a brand-new E5600F connected via fibre/Atto Celerity 162P to our Dell T440 running Windows Server 2016.

On a 4000-file, 37 GB write test across the LAN from a Mac M1 on 1GB Ethernet, we're seeing 9:30 on the Promise, and 6:30 on our older NAS. The NAS is devouring those files.

What can we do to enhance SMB performance on the Windows Server? Or is the bottleneck on the Promise?


Babatunde Akinkuolie posted this 09 March 2023

This spiceworks forum post should help in regards to SMB signing.




After digging a lot I finally found the cause for slow network speed. The reason was because of packet signing for SMB traffic. It seems when you enable packet signing it significantly reduces the file sharing speed. For that, you need to disable the packet signing in group policy object "Microsoft network server: Digitally sign communications (always)" located in Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\ or by editing the registry keys EnableSecuritySignature = 0, RequireSecuritySignature = 0 in HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanServer\Parameters.


You can have a look to microsoft reference as well.