Administer > Monitor Network Health > Create Custom Polling Configurations > Create a Custom Poller Collection > Configure Comparison Maps for a Custom Poller Collection

Configure Comparison Maps for a Custom Poller Collection

[This is the context-sensitive link for the State Mapping tab.]

Prerequisite: .You must know the valid values that might be returned when the MIB Expression is polled. The Comparison Map feature applies to only Instance Customer Poller Collection Types.

Custom Poller enables you to map the returned value of a MIB Expression to a Custom Polled Instance State. These values are used to determine the High State and Low State of the Custom Polled Instance. NNMi administrators can configure NNMi to generate an incident when the Custom Polled Instance's State changes. For example, you might want the hrDeviceStatus value of 5 (or lower) to be mapped to a Critical State. This means that NNMi changes the State of the Polled Collection Instance to Critical each time the hrDeviceStatus returns a value of 5 when polled.

When configuring Comparison Maps, note the following:

  • NNMi applies the Comparison Maps according to the Ordering number defined. The first comparison criteria met defines the State for the Polled Instance.
  • You can configure Thresholds, which also contribute to State calculations. If you configure both Thresholds and Comparison Maps, NNMi first checks the Threshold settings to determine State values. If the threshold evaluates to non-Normal, NNMi uses the Threshold settings to determine State values. if the Threshold evaluates to Normal, NNMi checks for a non-Normal State using any Comparison Map configuration. See Configure Threshold Information for a Custom Poller Collection for more information about configuring thresholds.
  • When evaluating Threshold configurations with MIB Expressions that include one or more MIB Variables of type Counter or Counter64, NNMi evaluates the MIB Variable value using the difference in value between the most recent poll and the poll before it.

To configure Comparison Maps for a MIB Expression:

  1. Prerequisite: You must specify the MIB Expression you want to poll. See Specify the MIB Variable Information for a Custom Poller Collection for more information.
  2. Locate the Comparison Maps tab.
  3. Do one of the following:

    • To create a Comparison Map, click the  New icon.
    • To edit a Comparison Map, double-click the row representing the configuration you want to edit.
  4. Make your configuration choices (see table).
  5. Click   Save and Close to close the Custom Poller Collection form.
  6. Complete the configuration for this Custom Poller Collection configuration, if you have not already done so: Concept Link IconSee Also

  7. Click  Save and Close to close the Custom Poller Configuration form.

    Note Each time you save a Comparison Maps configuration, NNMi suspends Custom Polling for the Custom Poller Collection.  When you finish making your Comparison Mapping changes, set the Active State to Active for each of the policies in the Custom Poller Collection that you want to be in use. See Create a Policy for more information.

State Mapping Attributes

Attribute Description
Ordering

The order in which the State mapping (Comparison Maps) operations should be performed.

Note NNMi uses the Ordering value to determine which State mapping to use. The lower the number, the higher the priority. For example, 1 is the highest priority.

Comparison Operator

Operator used to evaluate the Comparison Value and subsequently determine its State. For example, the < (less than) Comparison Operator indicates the polled value must be less than the Comparison Value specified to change the Custom Poller Polled Instance to the specified State value.

Possible Comparison Operator values are:

  • <  (Less than)
  • <=  (Less than or equal to)
  • =  (Equal to)
  • != (Not equal to)
  • >  (Greater than)
  • >=  (Greater than or equal to)
  • is null (Null or unavailable) 
  • is not null (Contains a value)
  • default (Sets the State when no matches are found using the other Comparison Operators)

Note Ordering for the default Comparison Operator must be the last.

Comparison Value

The value returned when the MIB Expression is evaluated when polled.
State Mapping

The State to assign to the Custom Poller Polled Instance when the polled value is returned. For example, each time the value 3 (warning) is returned when NNMi polls hrDeviceStatus, you can specify that you want NNMi to change the State of the Polled Instance to Warning.

Possible State values for a Polled Instance (Threshold = High State/Low State; or Comparison Map = State Mapping) are:

Normal 

Warning

Minor

Major

Critical