HP 5500 EI Series Configuration Manual page 123

The collaboration comprises the following parts: the application modules, the track module, and the
detection modules.
• A detection module monitors objects, such as the link status, and network performance, and informs
the track module of detection results.
Upon the detection results, the track module changes the status of the track entry and informs the
•
associated application module. The track module works between the application modules and the
detection modules. It hides the differences among detection modules from application modules.
The application module takes actions when the tracked object changes its state.
•
The following describes how a static route is monitored through collaboration.
1. NQA monitors the reachability to 192.168.0.88.
2. When 192.168.0.88 becomes unreachable, NQA notifies the track module of the change.
3. The track module notifies the state change to the static routing module
4. The static routing module sets the static route as invalid.
For more information about collaboration and the track module, see High Availability Configuration
Guide.
Supporting threshold monitoring
NQA supports threshold monitoring for performance parameters such as average delay jitter and packet
round-trip time. The performance parameters to be monitored are monitored elements. NQA monitors
threshold violations for a monitored element, and reacts to certain measurement conditions (for example,
sending trap messages to the network management server). This helps network administrators
understand the network service quality and network performance.
Monitored elements
•
Table 8
monitored.
Table 8 Monitored elements and NQA test types
Monitored elements
Probe duration
Count of probe failures
Packet round-trip time
Count of discarded packets
One-way delay jitter (source-to-destination and
destination-to-source)
One-way delay (source-to-destination and destination-to-source)
Calculated Planning Impairment Factor (ICPIF) (see
voice tests")
Mean Opinion Scores (MOS) (see
describes the monitored elements and the NQA test types in which the elements can be
"Configuring voice
Test type supported
Tests excluding UDP jitter test and voice
test
Tests excluding UDP jitter test and voice
test
UDP jitter test and voice test
UDP jitter test and voice test
UDP jitter test and voice test
UDP jitter test and voice test
"Configuring
Voice test
tests") Voice test
113