Getting started

About this guide

This guide describes the Quality of Service (QoS) provided by the routers and presents examples to configure and implement various protocols and services.

This document is organized into functional chapters and provides concepts and descriptions of the implementation flow, as well as Command Line Interface (CLI) syntax and command usage.

Note: Unless otherwise indicated, CLI commands, contexts, and configuration examples in this guide apply for both the MD-CLI and the classic CLI.

The topics and commands described in this document apply to the:

  • 7450 ESS

  • 7750 SR

  • 7950 XRS

  • Virtualized Service Router

For a list of unsupported features by platform and chassis, see the SR OS R23.x.Rx Software Release Notes, part number 3HE 19269 000 x TQZZA.

Command outputs shown in this guide are examples only; actual displays may differ depending on supported functionality and user configuration.

Note:

The SR OS CLI trees and command descriptions can be found in the following guides:

  • 7450 ESS, 7750 SR, 7950 XRS, and VSR Classic CLI Command Reference Guide

  • 7450 ESS, 7750 SR, 7950 XRS, and VSR Clear, Monitor, Show, and Tools Command Reference Guide (for both MD-CLI and Classic CLI)

  • 7450 ESS, 7750 SR, 7950 XRS, and VSR MD-CLI Command Reference Guide

Note: This guide generically covers Release 23.x.Rx content and may contain some content that will be released in later maintenance loads. See the SR OS R23.x.Rx Software Release Notes, part number 3HE 19269 000 x TQZZA for information about features supported in each load of the Release 23.x.Rx software.

QoS configuration process

Configuration process lists the tasks necessary to configure and apply QoS policies. This guide is presented in an overall logical configuration flow. Each section describes a software area and provides CLI syntax and command usage to configure parameters for a functional area.

Table 1. Configuration process
Area Task Section

Match lists in network, SAP ingress and SAP egress QoS policies

Configure a QoS match list

Match list for QoS policies

Network QoS policies

Configure a network QoS policy

Basic configurations

Service management

Service management tasks

Network queue QoS policies

Configure a network queue QoS policy

Basic configurations

Service management

Service management tasks

Service Ingress and Egress QoS policies

Configure a service ingress QoS policy

Service ingress QoS policy

Configure a service egress QoS policy

Service egress QoS policy

Service management

Service management tasks

Queue sharing and redirection

Configure ingress and egress queue groups

Basic configurations

Scheduler QoS policies

Configure a QoS scheduler policy

Basic configurations

Service management

Service management tasks

Slope QoS policies

Configure a slope QoS policy

Basic configurations

Service management

Service management tasks

Shared-Queue QoS policies

Configure a shared-queue QoS policy

Basic configurations

Advanced QoS policies

Configure advanced QoS policies

Basic configurations

Service management

Service management tasks

High Scale QoS IOM

Configure HSQ IOM

High scale QoS IOM

Class Fair Hierarchical Policing (CFHP)

Configure CFHP

Class fair hierarchical policing (CFHP)

Conventions

This section describes the general conventions used in this guide.

Precautionary and information messages

The following information symbols are used in the documentation.

DANGER: Danger warns that the described activity or situation may result in serious personal injury or death. An electric shock hazard could exist. Before you begin work on this equipment, be aware of hazards involving electrical circuitry, be familiar with networking environments, and implement accident prevention procedures.
WARNING: Warning indicates that the described activity or situation may, or will, cause equipment damage, serious performance problems, or loss of data.
Caution: Caution indicates that the described activity or situation may reduce your component or system performance.
Note: Note provides additional operational information.
Tip: Tip provides suggestions for use or best practices.

Options or substeps in procedures and sequential workflows

Options in a procedure or a sequential workflow are indicated by a bulleted list. In the following example, at step 1, the user must perform the described action. At step 2, the user must perform one of the listed options to complete the step.

Options in a procedure

  1. User must perform this step.
  2. This step offers three options. User must perform one option to complete this step.
    • This is one option.
    • This is another option.
    • This is yet another option.

Substeps in a procedure or a sequential workflow are indicated by letters. In the following example, at step 1, the user must perform the described action. At step 2, the user must perform two substeps (a. and b.) to complete the step.

Substeps in a procedure

  1. User must perform this step.
  2. User must perform all substeps to complete this action.
    1. This is one substep.
    2. This is another substep.