Slow network browsing (at times)

Question

Hi all: Ever since we installed our new servers (January-February) we have been experiencing slow network performance. We currently run OES11 SP2 servers and use Novell Client 2 SP3 for Windows 7 (IR9 and 10) on Windows 7 64-bit workstations. We also use ZCM 11 SP3 clients. All our workstations are members of the same domain (functional level 2008 R2).
Here is what I observe. Right after completing a successful login access to any OES server takes 2-3 seconds for the directory list to display. Once one server has been accessed we do not see the delay to other OES server. Browsing and access to the domain servers seems unaffected. But after a few minutes and symptoms return. I have tried various remedies detailed in a few TIDS and Cool solutions but none seem to help. I have elevated the Novell network providers to the top of the provider list. Wireshark captures don't show any smoking guns.
Suggestions? Thanks, Chris.

Answer 1

Originally Posted by laurabuckley
Hi Chris,
A while ago I had similar issues. I made a few changes to the Windows 7 workstations and the situation greatly improved.
The first thing that I recommend you do is turn off Autotuning.
From an elevated command prompt on the workstation: netsh interface tcp set global autotuninglevel=disabled
The second thing that I recommend you do is turn off Remote Differential Compression.
From an elevated command prompt on the workstation: Netsh interface tcp set global rss=disabled
I would suggest that you try this just on one or two workstations first and see if the situation improves.
Please do let us know how it goes.
Cheers,
I may be wrong here but I just want to clarify:
From an elevated command prompt on the workstation: Netsh interface tcp set global rss=disabled
I believe this Disables Receive side scaling, not Remote Differential Compression.
To disable Remote Differential Compression you can either remove it through the "Windows Components" in Add/Remove or Run:
ocsetup MSRDC-Infrastructure /uninstall
Along with the above I run the following in a Run Once Bundle on all machines:
netsh.exe int ip set global taskoffload=disabled
netsh.exe interface tcp set global autotuning=disabled
netsh.exe interface tcp set global rss=disabled
netsh.exe int tcp set heuristics disabled