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S12700 V200R010C00 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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Applying the DiffServ Domain

Applying the DiffServ Domain


You can bind a DiffServ domain to an inbound or outbound interface of packets to enable the device to implement mapping between packet priorities and PHBs/colors according to the mappings defined in the DiffServ domain.


  1. Run:


    The system view is displayed.

  2. Run:

    interface interface-type interface-number

    The interface view is displayed.

  3. Run:

    trust upstream { ds-domain-name | default | none }

    A DiffServ domain is bound to the interface.

    If trust upstream none is configured on an interface, the system does not perform priority mapping for incoming and outgoing packets.

    To change the DiffServ domain bound to an interface, run the undo trust upstream command to unbind the original DiffServ domain from the interface, and then run the trust upstream command to bind the new DiffServ domain to the interface.

  4. (Optional) Run:

    undo qos phb marking enable

    PHB mapping is disabled for outgoing packets.

    By default, PHB mapping is enabled for outgoing packets on an interface.

Updated: 2019-08-21

Document ID: EDOC1000142089

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