Hello,
We have a setup running consisting of 2 TMG 2010 machines in an Array. We use NLB Multicast.
We are hosting about 25 site to site vpns in this setup. Users behind these (site to site) vpns are expiriencing lag in their RDS session from time to time through these VPN's. Also sometimes the sessions are disconnected/reconnected.
I have seen that tcp checksum offloading was enabled on all interfaces, so I disabled this.
What I also notice are NLB event 105 and 106 numerous times in the time window when users are active.
105: NLB cluster []: Timer starvation has been detected. This might be due to a denial of service attack or a very high server load. During this period, some connections might fail. If this problem recurs frequently, analyze the threat and take appropriate measures and/or add more servers to the cluster. An informational event log entry will be logged when the attack has subsided.
106: NLB cluster []: Timer starvation has subsided.
I have found the following post regarding these events: http://sharepointblog.michaelrperry.com/2011/03/nlb-event-id-105-sharepoint-2007-and.html
Here the problems are resolved after disabling tcp checksum offloading on the virtual nics, just as what I have done. However, I still got the same errors.
Has somebody experienced the same issues and errors? I'm getting a bit stuck here and users are still complaining about latency and disconnected sessions.