F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices High Availability Configuration Guide-6PW100

7BConfiguring NQA

NQA can be configured only at the CLI.

42B

Overview

Network quality analyzer (NQA) allows you to monitor link status, measure network performance, verify

the service levels for IP services and applications, and troubleshoot network problems. It provides the

following types of operations:

• ICMP echo

• DHCP

• DNS

• FTP

• HTTP

• UDP jitter

• SNMP

• TCP

• UDP echo

• Voice

• Data Link Switching (DLSw)

As shown in

530HFigure 50, the NQA source device (NQA client) sends data to the NQA destination device

by simulating IP services and applications to measure network performance. The obtained performance

metrics include the one-way latency, jitter, packet loss, voice quality, application performance, and

server response time.

All types of NQA operations require the NQA client, but only the TCP, UDP echo, UDP jitter, and voice

operations require the NQA server. The NQA operations for services that are already provided by the

destination device such as FTP do not need the NQA server.

You can configure the NQA server to listen and respond on specific ports to satisfy various test needs.

Figure 50 Network diagram

138BCollaboration

NQA can collaborate with the track module to notify application modules of state or performance

changes so that the application modules can take predefined actions.