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Cisco Bug: CSCuq49854 - Connection to PowerShell Agent on Windows 2012R2 U1 fails consistently

Last Modified

Nov 27, 2020

Products (1)

  • Cisco UCS Director

Known Affected Releases

4.100 4.100(0.3)

Description (partial)

UCS Director fails to connect to PowerShell Agent (PSA) running on Windows 2012 R2

The PSA logs show the following:
ERROR cuic.ClientConnection [(null)] - Exception: A call to SSPI failed, see inner exception.
DEBUG cuic.ClientConnection [(null)] - Inner exception: The message received was unexpected or badly formatted

The UCSD logs show:
WARN isAgentReachable( - Unable to communicate with remote host x.x.x.x: Server key

This occurs if the PSA server has Windows 2012 R2 "Update 1" (KB2919355) installed. as well as with other versions where cipher suite order has changed..
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  • Full Description (including symptoms, conditions and workarounds)
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