Event 11 (1178) Causes SNA Server to Fail Abnormally

RESOLUTION

• Reduce the number of APPC LU partnerships.
  
  Using the SNA Server Admin program, select each Local APPC LU, choose the Partners button, and delete any LU/LU/mode partnerships that are not being used. When the Enable Automatic Partnering checkbox is selected on an APPC LU or Mode, this can cause extra LU/LU partnerships that are not intended.
• Reduce the number of automatically activated sessions.
  
  Within the SNA Server APPC mode definition, the Automatic Activation Limit can be configured to automatically bind a specified number of LU6.2 sessions when the connection is started. Automatically starting an LU6.2 session ahead of time makes the session immediately available for an LU6.2 conversation. However, the overhead necessary to start an LU6.2 session is often negligible, so automatic session activation is often unnecessary.
  
  Reducing the automatic activation limit will reduce the number of BIND messages that SNA Server will queue internally.
• Defer CNOS processing until sessions are needed.
  
  The SNA Server service can be configured to defer the APPC LU CNOS processing until the LU sessions are actually requested by APPC applications. This feature can be enabled using the following registry entry:

        HKEY_LOCAL_MACHINE
        \SYSTEM\CurrentControlSet\Services\SnaServr\Parameters
        NOINITCNOS: REG_SZ: YES
  						

  This setting will cause SNA Server to defer CNOS processing until an APPC application allocates a conversation over an APPC LU pair.