Quality of Service (QoS)

A Quality of Service (QoS) policy ensures data transfer in accordance with the requirements set for traffic classes. In Kaspersky SD-WAN, the following components contribute to the quality of service:

• Traffic classes - indicate the priority of traffic processing and distribute traffic among queues. For example, you can use one of the traffic classes for real-time traffic that requires minimizing packet loss. You can map traffic to traffic classes when creating or editing a traffic classifier.
• Traffic classifiers determine whether or not the DSCP values specified in the traffic packet header fields must be trusted. If a traffic classifier does not trust DSCP values, it maps them to traffic classes. You can specify a traffic classifier when creating or editing a quality of service rule to make the quality of service rule use this traffic classifier.
• Quality of service rules determine whether the bandwidth of traffic processed by traffic classifiers is limited. You can specify a quality of service rule when you create or edit a transport service to make the transport service use this quality of service rule.
• Constraints are used to configure how the paths are built in transport services. You can create two types of constraints:
  • Manual-TE constraints add Manual-TE paths to transport services.
  • Threshold constraints specify link monitoring thresholds that are used to build Auto-TE paths in transport services.

  You can specify a constraint when creating or editing a transport service to make the transport service use this constraint.

• Traffic classification rules identify traffic with particular values of the L2 – L4 header fields, as well as traffic of specified applications, in the overall stream of traffic. You can specify a traffic classification rule when creating or editing a traffic filter to make the traffic filter use this traffic classification rule.
• Traffic filters filter traffic based on specified traffic classification rules. You can specify a traffic filter when creating or editing a transport service or ACL interface to make the transport service or ACL interface use this traffic filter.