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This error message indicates a general network connectivity erro= r between the Monitoring Station and the monitored agent servers. It = has only been seen on Windows Monitoring Stations and is generally resolved= using one of the following methods:
If your monitoring station server has a TOE-enabled network card, you ma= y need to disable it. TOE is intended to accelerate long-running TCP = connections. Because Uptime Infrastructure Monitor uses many short-li= ved connections to contact agents, its process can be mismanaged by the TOE= . Please perform the following commands on the monitoring station to = disable TOE:
If the TCP/IP Offload setting is not found by using the previous steps, = you may need to disable the TCP Offload setting within another program or W= indows service with an advanced network card configuration. For examp= le:
HP Network Configuration Utility
Broadcom Advanced Control Suite
If Uptime Infrastructure Monitor is monitoring more than 500 services, y= ou may find that the default Windows TCP stack options are not sufficient t= o maintain the outbound Uptime Infrastructure Monitor connections. In= this case, we recommend adjusting registry settings on the monitoring stat= ion to relieve some common TCP bottlenecks:
Under the :HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Tcpi= p\\Parameters registry key, create the following new keys:
Description: this parameter controls t= he maximum port number that is used when a program requests an available us= er port from the system.
Typically, ephemeral (s= hort-lived) ports are allocated between the values of 1024 and 5000 inclusi= ve.
Description: this parameter determines= the length of time that a connection stays in the TIME_WAIT state when bei= ng closed. While a connection is in the TIME_WAIT state, the socket p= air cannot be re-used.
This is also known as t= he 2MSL state because the value should be twice the maximum segment lifetim= e on the network. See RFC 793 for further details.
TCP Chimney Offload is a networking technology that helps transfer the w= orkload from the CPU to a network adapter during network data transfer.&nbs= p;In Windows Server 2008, TCP Chimney Offload enables the Windows networkin= g subsystem to offload the processing of a TCP/IP connection to a network a= dapter that includes special support for TCP/IP offload processing.
Please review - Information about the TCP Chimney Offlo= ad for detailed explanation of what the TCP Chimney Offload is and= instructions (including an option to run a wizard) to guide you through th= is change.
Related KB - Increasing Windows TCP socket limits