QoS Management

Quality of service (QoS) is a capability of an IP network. That is, the capability can provide service required for specified business on the IP network crossing multiple bottom-layer network technologies (such as Ethernet, ATM, SDH, MPLS, MP, and FR). This ensures expected service level at aspects such as packet loss rate, delay, jitter, and bandwidth.

QoS traffic monitoring provides network traffic monitoring and analysis reports based on traffic classification. It periodically generates quality reports for network performance indicators such as the matching rate, discarding rate, over committed bandwidth rate, and bandwidth usage based on the traffic policy, traffic classification, and traffic behavior, which enables users to clearly and systematically understand the distribution of the current network traffic.

eSight provides QoS Manager to monitor traffic. When traffic policies are configured for interfaces and VLANs, the tool measures network performance counters such as rate of packets matching a traffic classifier, packet drop rate, rate of packets exceeding the CIR, and bandwidth usage for the interfaces.

The QoS configuration is completed on the device: traffic classification, traffic behavior, and traffic policy. In addition, the traffic policy has been applied to interfaces. After a device is added to eSight, eSight reads the MIB information of the device to obtain the traffic policy, traffic classification, and traffic behavior. If automatic creation is configured in the QoS indicator template, eSight automatically creates the QoS indicator (such as matching rate, discarding rate, over committed bandwidth rate, and bandwidth usage) collection task after a device is added to eSight. eSight periodically accesses devices to collect QoS data and stores the data in the eSight database. Then, eSight displays top N device data in charts on the dashboard to maintenance personnel. The maintenance personnel can query historical data as required. After a time segment is selected, eSight vividly displays data in the time segment in curve charts and area charts.

By normalizing QoS traffic KPIs (blocking vendor and QoS configuration differences), QoS traffic management of eSight extracts the four QoS traffic KPIs (matching rate, discarding rate, bandwidth usage, and over committed bandwidth rate) concerned by users, reducing the O&M efficiency.

• Matching rate: Reflects the actual traffic volume of each traffic classification, enabling users to learn the actual traffic distribution of each traffic classification.
• Traffic classification bandwidth usage: Indicates the ratio of the actual traffic of the traffic classification to the bandwidth limit of the traffic classification. You can set the threshold of this KPI to implement traffic warning.
• Discarding rate: Reflects the packet loss information of each classification during QoS scheduling. By analyzing the value of this KPI, you can learn the impact of congestion on services (for example, whether packet loss occurs and which traffic classification encounters packet loss).
• Over committed bandwidth rate: Indicates the difference of the actual traffic bandwidth of the traffic classification minus the limited bandwidth of the traffic classification. Through this KPI, you can learn the bandwidth insufficiency information, providing data support for bandwidth adjustment.