Windows tcp connection failures

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Ask a question. Quick access. This answer addresses the "initial connect" scenario for Windows 7, which is different from XP. For Windows 7, two hotfixes are required to support adjusting connect timeout settings. The new settings can be configured with the 'netsh' command. The first hotfix adds a 'MaxSynRetransmissions' setting which allows changing the retry setting from the default value of 2. The second adds 'InitialRto' setting which allows changing the Initial RTO value from the default of ms yes, milliseconds , but only to something shorter than ms; it cannot be increased.

Depending on your situation, you may only need the 'MaxSynRetransmissions' hotfix. Install both hotfixes, reboot, then open a command window as Administrator. Further reboots are not required for subsequent netsh command invocations. Note: Windows telnet is used for the reference for actual connection timeout. It needs to be installed separately, but is easy to do.

This Microsoft document does not include them. During this time, reopening the connection to the client and server costs less than establishing a new connection. You may not have it set if you are using Win or later, but the default is decimal seconds or 4 minutes that is.

You can add the key to the registry with a different value and it will take effect after a reboot tested on Windows Server R2 in a production environment. This is an absurdly high value given the quality of modern networks. I had an application literally less than a month ago running on a server that exhausted the maximum number of connections Windows can support and killed every network service on that server regularly.

We set the value to 30 decimal 30 seconds and voila, the issue was solved - less than 10, simultaneous connections since the app was rapidly opening and closing them and no throughput issues. Sign up to join this community. The customer is having performance issues and we're trying to determine whether the issue is with storage or some other configuration. As part of the testing we have been using Iometer to generate a workload on the storage and at the same time we were using the HyperV After parsing the collection we found it reported the following Can anybody provide any insight as this indicates?

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