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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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(Optional) Setting the Length of a Port Queue

(Optional) Setting the Length of a Port Queue

Context

You can set the maximum number of bytes to be cached in a specified queue on an interface so that the queue has sufficient buffer, preventing packet loss.

Before setting the maximum number of bytes to be cached in a queue, run the shutdown command to shut down the interface. After the maximum number of bytes to be cached in a queue is set, run the undo shutdown command to enable the interface. These operations may cause network interruption for a short period of time.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The interface view is displayed.

  3. Run shutdown

    The interface is shut down.

  4. Run qos queue queue-index length length-value

    The queue length on the interface is set.

    NOTE:

    X series cards do not support this command.

    The ET1D2L02QSC0 and ET1D2C02FEE0 cards do not support change of queue lengths. These cards support the maximum queue length by default.

  5. Run undo shutdown

    The interface is enabled.

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Updated: 2019-04-08

Document ID: EDOC1100065653

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