Server 2012 R2, TCP/IP has chosen to restrict the congestion window

Hi
I have a set of 2012 R2 remote desktop session hosts on Vmware 5.5 provided by a 3rd party. Intermittently, they will log the following event:
Log: System
Type: Warning
Event: 4230
Alert Time: 2014-08-25 13:10:23Z
Event Time: 05:10:06 AM 25-Aug-2014 UTC
Source: Tcpip
Category: None
Username: N/A
Computer: xxxxxxxxxxxx
Description: TCP/IP has chosen to restrict the congestion window for several connections due to a network condition. This could be related to a problem in the TCP global or supplemental configuration and will cause degraded throughput.
If I run a netsh int tcp show global, the following is set:
Receive-side scaling state - enabled
Chimney offload state - disabled
NetDMA state - disabled
Direct Cache Access (DCA) - disabled
Receive Window Auto-tuning level - normal
Add-on congestion control provider - none
ECN capability - enabled
RFC 1323 timestamps - disabled
Initial RTO - 3000
Receive Segment Coalescing State - enabled
Non Sack Rtt Resiliency - disabled
Max SYN Retransmissions - 2
I will admit my knowledge on these advanced tcp settings is limited. Is there anything about what is set that could cause these errors? Or do I need to worry about them?
Aaron Clegg

Hi Aaron,
For the warning event, usually we do not need to worry more about it if there is any business impaction on that.
From the description of this error, it seems to have a overload when many of the connections access to the session host. In my opinion, it may be caused by the 3rd party application or NIC influence. Have you tried to reset the TCP/IP stack?
or Could you adjust the offload setting to disable RSS also? You might refer to this
http://support.microsoft.com/kb/951037.
At the same time, I found another same error appearing on windows 8.1, could you see this?
http://social.technet.microsoft.com/Forums/windows/en-US/e3d89862-6613-4515-b504-5b111978308f/tcpip-has-chosen-to-restrict-the-congestion-window-for-several-connections-due-to-a-network?forum=w8itpronetworking
Hope this helps.
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