Configuring Nqa; Overview; Nqa Features - HP 6125G Configuration Manual

Configuring NQA

Overview

Network Quality Analyzer (NQA) can perform various types of tests and collect network performance
and service quality parameters such as delay jitter, time for establishing a TCP connection, time for
establishing an FTP connection, and file transfer rate.
With the NQA test results, you can diagnose and locate network faults, be aware of network
performance in time and take proper actions to correct any problems.

NQA features

Supporting multiple test types
Ping uses only the Internet Control Message Protocol (ICMP) to test the reachability of the destination host
and the round-trip time. As an enhancement to ping, NQA supports more test types and functions.
NQA supports 1 1 test types: ICMP echo, DHCP, DNS, FTP, HTTP, UDP jitter, SNMP, TCP, UDP echo, voice,
and DLSw.
NQA enables the client to send probe packets of different test types to detect the protocol availability
and response time of the peer. Test results help you understand network performance.
Supporting the collaboration function
Collaboration is implemented by establishing reaction entries to monitor the detection results of NQA
probes. If the number of consecutive probe failures reaches a limit, NQA informs the track module of the
detection result, and the track module triggers other application modules to take predefined.
Figure 36 Implement collaboration
Application modules
VRRP
Static routing
Policy-based
routing
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.
Detection
module
NQA
Track
reaction
module
entries
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