Application Scenarios for NQA

Performing Network Diagnosis

Networks often encounter such problems as intermittent network disconnections, failure to access websites, slow Internet access, and slow file downloading. When these occur, you can locate the fault by collecting statistics about network devices. These statistics must be provided by the devices.

In the example shown in Figure 1, users in different places connect to each other over a VPN. They find, for instance, that the network intermittently disconnects and the connection is slow.

Figure 1 Performing network diagnosis

In this situation, you can deploy NQA on PEs to analyze network quality. Perform an ICMP test between the PEs and CEs to check the continuity of the network. After confirming that the network is correctly connected, perform a jitter test to measure network jitter. Then perform the same tests between the PEs. Analyze the test data and the faults that users encounter to locate the source of these faults.

Learning About Network Service Quality

In Figure 2, you can perform an NQA test on a switch to obtain statistics about the network operating status. This provides information about network service quality.

Figure 2 Learning about network service quality