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S12700 V200R013C00 Configuration Guide - QoS

This document describes the configurations of QoS functions, including MQC, priority mapping, traffic policing, traffic shaping, interface-based rate limiting, congestion avoidance, congestion management, packet filtering, redirection, traffic statistics, ACL-based simplified traffic policy, and HQoS.
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Overview of HQoS

Overview of HQoS

Traditional QoS technologies can provide differentiated services to meet requirements of voice, video, and data services. As the number of users and their individual bandwidth consumptions continue to grow, these technologies are facing new problems. Issues with traditional QoS technologies are as follows:
  • Traffic is scheduled based on interface bandwidth, allowing differentiation of traffic based on service level. However, it is difficult to differentiate services based on users. Traditional QoS is applicable to the core layer, but does not apply to the access layer.
  • Traditional QoS cannot manage or schedule traffic of multiple services from multiple users simultaneously.

HQoS has been introduced to address these issues by differentiating user traffic and schedule traffic based on service priorities. HQoS uses multiple levels of queues to further differentiate service traffic, and provides uniform management and hierarchical scheduling for transmission objects such as users and services. HQoS enables network devices to control internal resources with the existing hardware, providing QoS guarantee for advanced users while reducing network construction cost.

NOTE:

Only X1E series cards support the HQoS function.

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Updated: 2019-04-08

Document ID: EDOC1100065653

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