Nqa Concepts - HP 5500 EI Series Configuration Manual

• Threshold types
The following threshold types are supported:
average—Monitors the average value of monitored data in a test. If the average value in a test
exceeds the upper threshold or goes below the lower threshold, a threshold violation occurs. For
example, you can monitor the average probe duration in a test.
accumulate—Monitors total number of times the monitored data violates the threshold in a test.
If the total number of times reaches or exceeds a specific value, a threshold violation occurs.
consecutive—Monitors the number of consecutive times the monitored data violates the
threshold since the test group starts. If the monitored data violates the threshold consecutively for
a specific number of times, a threshold violation occurs.
The counting for the average or accumulate threshold type is performed per test, but the counting
for the consecutive type is performed after the test group starts.
Triggered actions
•
The following actions may be triggered:
none—NQA only records events for terminal display. It does not send trap information to the
network management server. NQA DNS tests do not support the action of sending trap
messages. The action to be triggered in DNS tests can only be the default one, none.
trap-only—NQA records events and sends trap messages to the network management server.
Reaction entry
•
In a reaction entry, a monitored element, a threshold type, and the action to be triggered are
configured to implement threshold monitoring.
The state of a reaction entry can be invalid, over-threshold, or below-threshold, using the following
workflow:
Before an NQA test group starts, the reaction entry is in the state of invalid.
After each test or probe, threshold violations are counted according to the threshold type and
range configured in the entry. If the threshold is violated consecutively or accumulatively for a
specific number of times, the state of the entry is set to over-threshold. Otherwise, the state of the
entry is set to below-threshold.
If the action to be triggered is configured as trap-only for a reaction entry, when the state of the
entry changes, a trap message is generated and sent to the network management server.

NQA concepts

Test group
An NQA test group specifies test parameters including the test type, destination address, and destination
port. Each test group is uniquely identified by an administrator name and operation tag. You can
configure and schedule multiple NQA test groups to test different objects.
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