Behavior Models Cookbook - TCP Status Models - TcpRetransMon -
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TcpRetransMon

Path: \model\tcp_status\tcp_conn_mon.mod

Monitors the percentage of TCP retransmissions for a particular device. Retransmission occurs when messages use the TCP protocol and a message is not acknowledged. NerveCenter sends a 7007 Inform to the platform if a high number of retransmissions is detected.

Two additional alarms, TcpRetransMon_LogToDB and TcpRetransMon_LogToFile, are part of this model. When you enable these alarms, they perform a Log To Database or a Log to File alarm action, respectively, on each transition so that reports on TCP retransmissions can be produced.

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Note    The LogToDB alarm, works on Windows NT only.

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Property

The following property must be in the property group for the nodes you want to monitor:

tcp

Trigger Generators

Below is a list of the objects that generate triggers:

• TcpRetransStatus (poll)

Events Sent to OpenView

The table below summarizes the events this behavior model sends to OpenView:

For complete information about events sent to OpenView, see the trapd.conf.txt file shipped with these behavior models residing in:

\model\tcp_status

For more information about integrating NerveCenter with OpenView, or the other NerveCenter-supported network manager platforms, refer to the book Integrating NerveCenter with a Network Management Platform.

Optional Customization

Below is a list of behavior model settings that you might want to customize to suit the requirements of your site.

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Tip    It's a good practice to rename the behavior model objects that you modify. Whenever you import a model, NerveCenter will overwrite objects with the same name.

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• Poll intervals
• Poll conditions for TCP retransmission thresholds
• Change Inform to Inform Platform for Netcool, TME, Unicenter
• Log To File alarm action options
  (file pathname, log action variables, verbose or non-verbose output)
• Log To Database alarm action options
  (log identity number and log action variables)