Huawei Cloud VPN NQA

What Is NQA?

Network Quality Analysis (NQA) is a technology to measure network performance and collect statistics on network indicators such as delay, jitter, and packet loss rate. It helps administrators learn network service quality in real time and effectively diagnose and locate network faults.

Why Do We Need NQA?

As value-added services develop, users and carriers demand higher quality of service (QoS). Especially after voice and video services are provisioned on conventional IP networks, carriers and users reach service level agreements (SLAs) to implement QoS guaranteed services.

To provide committed bandwidth for users, carriers need to collect statistics about network indicators such as the delay, jitter, and packet loss rate, and analyze the statistics to obtain network performance. Conventional network performance analysis methods (such as ping and tracert) cannot meet carriers' requirements for real-time monitoring on diverse services. Against this backdrop, NQA can be deployed to accurately test the network running status and export statistics. NQA can measure the performance of various protocols running on the network. This facilitates real-time collection of different network performance indicators, such as the total HTTP connection delay, TCP connection delay, DNS resolution delay, file transfer rate, FTP connection delay, and DNS resolution error rate. Network carriers control these indicators to provide users with network services of various grades. In addition, NQA is an effective tool to diagnose and locate faults on the network.

NQA for Static Routes

Static routes do not have a dedicated detection mechanism. If an indirect link fails, a network administrator must manually delete the corresponding static route from the IP routing table. This process delays link switchover and causes service interruption for a significant amount of time.

When creating VPN connections in static routing mode, you can enable NQA to detect faults in links for static routes. This prevents the preceding problems and ensures stability of VPN connections. When using NQA, ensure that the customer gateway device supports ICMP and is correctly configured with the customer tunnel interface IP addresses of the VPN connections. Otherwise, traffic will fail to be forwarded.