Sunday, August 7, 2011

Turn off TCP chimney in Windows 2008

TCP chimney has caused more problem in Windows 2008.  ifgroup and failover do not work on Datadomain.  Windows 2008 client loses connectivity intermittently with backup server.  Once turned off TCP chimney, failover works fine on the media server.   There are new patches available from Microsoft for TCP chimney.  I have not tired it yet but don't plan to enable TCP chimney in the near feature since it causes more headache for me.

To turn off TCP chimney, run the following command
netsh int tcp set global chimney=disabled

To confirm it is turned off, run the following command
netsh int tcp show global