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NQA configuration

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, know network performance in

time and take proper actions.

NQA features

Supporting multiple test types

Ping can use 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 provides more test types and functions.

NQA supports 11 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. The test result helps you understand network performance.

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.

1. Monitored elements

Table 1 describes the monitored elements and the NQA test types in which the elements can be

monitored.

Table 1 Monitored elements and NQA test types

Monitored elements Test type supported

Probe duration Tests excluding UDP jitter test and voice test

Count of probe failures Tests excluding UDP jitter test and voice test

Packet round-trip time UDP jitter test and voice test

Count of discarded packets UDP jitter test and voice test

One-way delay jitter (source-to-destination and

destination-to-source)

UDP jitter test and voice test

One-way delay (source-to-destination and destination-to-source)

UDP jitter test and voice test

Calculated Planning Impairment Factor (ICPIF) (see “Configuring

voice tests”)

Voice test

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