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S1720GFR, S2700, S5700, and S6720 V200R010C00 Web-based Configuration Guide

This document describes the configuration and maintenance of device through the web network management system. The web network management system provides the functions of viewing device information and managing the entire system, interfaces, services, ACL, QoS, routes, security, and tools.
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Congestion Management

Congestion Management

To ensure that delay-sensitive services have higher QoS level than non-delay-sensitive services, you can perform congestion management when temporary congestion occurs or increase bandwidth when the network is always congested. Congestion management technology sends flows of packets in queues by using queue scheduling technologies and scheduling algorithms. The S1720GFR, S2720, S2750, S5700LI, S5700S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5720SI, and S5720S-SI series switches do not support this function.

View Scheduling

You can view the queue scheduling mode on an interface.

Context

Queue scheduling technologies include PQ scheduling, WDRR scheduling and WRR scheduling.

Procedure

  1. Choose QoS > Congestion Management > View Scheduling in the navigation tree to open the View Scheduling page.
  2. Select any interface.
  3. The scheduling configuration on the interface is displayed, as shown in Figure 2-177.

    Figure 2-177  Viewing the scheduling configuration on an interface

    NOTE:

    You can select only one interface.

Configuring Scheduling

When congestion occurs on a network, queue scheduling solves the resource preemption problem among multiple packets.

Context

  • Congestion management technology prevents intermittent congestion on networks by using queue scheduling technologies.
  • Queue scheduling technologies include PQ scheduling, WDRR scheduling and WRR scheduling.
NOTE:

The S5720HI switch does not support WRR scheduling.

Procedure

  1. Choose QoS > Congestion Management > Configure Scheduling in the navigation tree to open the Configure Scheduling page, as shown in Figure 2-178.

    Figure 2-178  Configure Scheduling

    Table 2-102 describes the parameters on the Configure Scheduling page.

    Table 2-102  Configure Scheduling

    Parameter

    Description

    Select Interface

    Indicates the interface where scheduling needs to be configured. You can select multiple interfaces.

    Queues

    Indicates the queue where scheduling needs to be configured.

    Scheduling Mode

    Indicates the queue scheduling mode, including:
    • PQ

      In PQ mode, the switch schedules packets based on priorities of queues in a strict manner. The weight is not used in this mode.

    • WDRR

      In RR mode, the switch schedules packets circularly based on priorities of queues. Based on RR scheduling, WDRR scheduling is used to schedule packet flows of all the queues according to the maximum bandwidth assigned by the switch to the queues.

    • WRR

      Based on WDRR scheduling, WRR scheduling is used to schedule packet flows based on weights of queues.

    The default value is WRR.
    NOTE:
    WRR and WDRR cannot be specified simultaneously.

    Weight

    Indicates the weight used to schedule packet flows in queues. When the scheduling mode is set to WRR or WDRR, the weight can be configured.

    • S5720EI: 0-63
    • Other models: 0-127

  2. Select the interfaces that you want to configure.
  3. Set the scheduling mode and weight for the queue.
  4. Click Apply.
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Updated: 2019-04-18

Document ID: EDOC1000114003

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