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Unable to enter IBM Cognos Administration / System



User launches IBM Cognos Administration. User clicks (on the left side) the "System" tab. User sees a long delay / hourglass, or alternatively an error.


CGI time-out or "Bad gateway" message inside IBM Cognos Administration


Microsoft Windows' TCP/IP network settings have several configurable limits/settings. The default settings may be too restrictive for some customers (especially in busy systems). Typically the following two settings are most important:

  • TcpTimedWaitDelay
Determines the time that must elapse before TCP can release a closed connection and reuse its resources. This interval between closure and release is known as the TIME_WAIT state or 2MSL state. During this time, the connection can be reopened at much less cost to the client and server than establishing a new connection.
  • MaxUserPort
Determines the highest port number TCP can assign when an application requests an available user port from the system. Typically, ephemeral ports (those used briefly) are allocated to port numbers 1024 through 5000.

Resolving The Problem

Modify the Cognos application server's network settings to allow more freedom for TCP/IP communication. Specifically, for many customers the ideal settings are to alter the parameters to the following settings:

  • TcpTimedWaitDelay = 30
  • MaxUserPort = 65534

For more details, see Third Party (Microsoft) websites below

[{"Product":{"code":"SSEP7J","label":"Cognos Business Intelligence"},"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Component":"Install and Config","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF016","label":"Linux"},{"code":"PF027","label":"Solaris"},{"code":"PF033","label":"Windows"}],"Version":"10.2;10.2.1;10.2.2","Edition":"Edition Independent","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
15 June 2018