V300R001C10 QoS Technical White Paper - Huawei QoS Technical White Paper Issue 01 Date 2013-12-10...

eSight V300R001C10

QoS Technical White Paper

Issue 01

Date 2013-12-10

HUAWEI TECHNOLOGIES CO., LTD.

Issue 01 (2013-12-10) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

i

Copyright © Huawei Technologies Co., Ltd. 2013. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior

written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective

holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and

the customer. All or part of the products, services and features described in this document may not be

within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements,

information, and recommendations in this document are provided "AS IS" without warranties, guarantees or

representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China

Website: http://enterprise.huawei.com

http://enterprise.huawei.com/

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QoS Technical White Paper About This Document



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About This Document

Purpose

This document describes the QoS key technologies and typical applications based on the

eSight QoS application background, functions, and typical application scenarios.

Intended Audience

This document is intended for:

Technical support personnel

Maintenance personnel

Symbol Conventions The symbols that may be found in this document are defined as follows.

Symbol Description

Indicates an imminently hazardous situation which, if not

avoided, will result in death or serious injury.

Indicates a potentially hazardous situation which, if not

avoided, could result in death or serious injury.


avoided, may result in minor or moderate injury.


avoided, could result in equipment damage, data loss,

performance deterioration, or unanticipated results.

NOTICE is used to address practices not related to personal

injury.

Calls attention to important information, best practices and

tips.

NOTE is used to address information not related to personal

injury, equipment damage, and environment deterioration.

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QoS Technical White Paper About This Document



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Change History

Changes between document issues are cumulative. The latest document issue contains all the

changes made in earlier issues.

Issue 01 (2013-12-10)

This issue is the first official release.

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QoS Technical White Paper Contents



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Contents

About This Document ....................................................................................................................... ii

1 Executive Summary ........................................................................................................................ 1

2 Introduction ..................................................................................................................................... 2

3 Solution ............................................................................................................................................ 3

3.1 Overview .......................................................................................................................................................... 3

3.2 Implementation ................................................................................................................................................ 4

3.2.1 Process of Collecting and Representing Service Quality Data ............................................................... 4

3.3 Function Constraints ........................................................................................................................................ 5

3.3.1 Applicable Device Types ......................................................................................................................... 5

3.4 Typical Applications ......................................................................................................................................... 6

3.4.1 QoS Performance Monitoring ................................................................................................................. 6

4 Experience...................................................................................................................................... 11

5 Conclusion...................................................................................................................................... 12

6 Acronyms and Abbreviations ....................................................................................................... 13

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QoS Technical White Paper Executive Summary



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1 Executive Summary

The quality of service (QoS) is the capability of a service provider to meet the demands of

users. For network services, the QoS relates to factors such as the bandwidth, latency, and

packet loss rate. The network service quality can be adjusted based on eSight QoS to reduce

network congestion and packet loss, implementing an appropriate QoS for different services

such as voice, video, and data services.

eSight QoS is a QoS-based traffic monitoring tool. It measures the network performance

counters such as the actually consumed traffic, discarded traffic, excess traffic, and traffic

efficiency for interfaces configured with traffic policies.

eSight QoS provides the following functions:

QoS traffic monitoring

Dashboard-based QoS data representation

Historical QoS data representation

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QoS Technical White Paper Introduction



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2 Introduction

The IP network bears an increasing number of various services. The enterprise network traffic

needs to be adjusted to implement the following purposes:

Prevent network congestion and packet loss

Provide dedicated bandwidth for enterprise users

Meet diversified QoS requirements of different services

Currently, the IP network is confronted with the following challenges in operation and

maintenance (O&M):

Network performance monitoring mechanisms are incomplete and cannot generate

performance deterioration prewarnings.

Proper QoS cannot be provided for different services.

eSight QoS periodically checks the QoS of services on the network and displays QoS data

through historical data diagrams, alarms, and reports. This provides quantitative network

quality data and helps network maintenance personnel to deploy QoS policies properly.

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QoS Technical White Paper Solution



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3 Solution

3.1 Overview

eSight QoS can monitor traffic performance data by QoS traffic classifier to provide better

network experience for users.

Figure 3-1 QoS solution

Voice

VideoData

Voice

VideoData

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Voice service

Data service

Built-in NQA probe

Counter collection

1. Maintenance personnel deploy the QoS policy for various services running on the IP

network such as voice, video, and data services based on the site scenario.

2. Maintenance personnel find network devices for which the QoS policy is deployed and

create QoS monitoring tasks in eSight.

3. eSight collects service quality data based on the configured interval.

4. Maintenance personnel view the historical data, alarms, and reports to check the service

quality.

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3.2 Implementation

3.2.1 Process of Collecting and Representing Service Quality Data

The traffic classifier, behavior, and policy have been configured for devices, and traffic policy

has been applied to interfaces.

A QoS configuration example is as follows:

#

traffic classifier cos2 operator or

if-match acl 3202

traffic classifier cos3 operator and

if-match dscp default

traffic classifier cos1 operator or

if-match acl 3201

#

traffic behavior bh2

remark dscp af31

queue af bandwidth pct 60

statistic enable


remark dscp ef

queue ef bandwidth pct 20

statistic enable


remark dscp default

statistic enable

#

traffic policy dscp

classifier cos1 behavior bh1



#

interface GigabitEthernet0/0/1

ip address 192.168.20.3 255.255.254.0

qos gts cir 9000 cbs 225000

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traffic-policy qostestaf31 outbound

1. Add a device to eSight.

2. eSight reads the device MIB information to obtain the traffic policy, classifier, and

behavior information.

3. If the function of automatically creating the QoS template is enabled, eSight

automatically creates a task for collecting QoS counters.

4. eSight periodically accesses devices to obtain service performance data and stores the

obtained data to the eSight database.

5. eSight displays the collected top N data on the dashboard for maintenance personnel.

6. Maintenance personnel set the time segment and view historical data through line charts

and stack areas.

3.3 Function Constraints

3.3.1 Applicable Device Types

Device Device Type Device Version

Huawei NE NE40E All versions

Huawei AR AR150

AR200

AR1200

AR2200

AR3200

All versions

H3C device AR28

AR29

AR46

AR49

MSR

All versions

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3.4 Typical Applications

3.4.1 QoS Performance Monitoring

Figure 3-2 QoS performance monitoring

Voice Voice

VideoVideo

eSight

DataData

EF

BE

AF

Voice (cos1)

Video (cos2)

Data (cos3)

Built-in NQA probe

Counter collection

Router A Router B

Monitor service quality of

each QoS queue in each

channel

Two enterprise regions are connected to the wide area network (WAN) through routers A and

B. Routers A and B are configured with a QoS policy respectively. Voice streams are

transmitted through the EF queue to meet requirements of low latency. Video streams are

transmitted through the AF queue to ensure that they are transmitted with a high bandwidth.

Data streams are transmitted through the BE queue to send service data that does not impose

high requirements on QoS. The traffic and bandwidth efficiency of each queue can be

monitored based on eSight QoS.

To create a QoS performance monitoring task, perform the following steps:

Step 1 Choose Monitor > Monitoring Settings > Performance Collection Task, as shown in

Figure 3-3.

Figure 3-3 Performance tab page

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Step 2 On the Performance Collection Task page, click Create. The page for creating performance

tasks is displayed, as shown in Figure 3-4.

Figure 3-4 Creating a QoS monitoring task

Step 3 In the Set parameters step on the displayed page, set the collection task name, collection

period, and description.

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Step 4 Select a performance counter template. In the Select an index template step, select a

template from the Index template drop-down list. You can click View index details to view

the counters contained in the template.

Step 5 Select resources.

Based on the types of selected performance counter templates, resources can be selected By

group, By device, or By object. Buttons next to the resource selection mode also vary

according to the selected performance counter template.

The following uses the Preconfigured QoS CAR counter template as an example to describe

how to select resources. The Preconfigured QoS CAR counter template allows resources to be

selected by group and object.

To collect statistics on a specified QoS counter group, click Select group to select

resources.

a. In the Select resources step, click By group.

b. In the Select QoS counter group dialog box, select QoS counter groups.

c. Click OK.

Figure 3-5 Selecting resources by group to create a QoS monitoring task

Select object applies to a small number of resources or a large number of device types.

a. In the Select resources step, click the ROOT node in the navigation tree on the left.

b. In the Select Measurement Object dialog box, select devices and ports.

c. Click. OK.

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Figure 3-6 Selecting resources by object to create a QoS monitoring task

Step 6 On the Performance Collection Task page, click OK.

After the performance collection task is created, eSight collects QoS traffic data based on the

configured period. Users can query historical QoS traffic data or view QoS data in dashboards

on the QoS Management page.

Figure 3-7 Selecting the QoS counter to be displayed on the QoS dashboard

The QoS dashboard displays the top 5–20 tasks with the highest QoS performance counters,

which helps you find regions where network quality degrades.

Figure 3-8 Viewing historical QoS data

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3.5

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QoS Technical White Paper Experience



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4 Experience

QoS traffic monitoring

eSight QoS periodically generates network traffic monitoring and analysis reports based

on the traffic classifier. These reports help maintenance personnel to learn about the

network traffic distribution.

QoS configuration verification

eSight QoS can authenticate the consistency between the actual network configurations

and the network plan, and provide the configuration scheme effect report.

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QoS Technical White Paper Conclusion



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5 Conclusion

eSight QoS measures network performance counters such as the actually consumed traffic,

discarded traffic, excess traffic, and traffic efficiency for interfaces configured with traffic

policies. It periodically generates network traffic monitoring and analysis reports based on the

traffic classifier, which helps maintenance personnel to learn about the network traffic

distribution and optimize the network accordingly.

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QoS Technical White Paper Acronyms and Abbreviations



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6 Acronyms and Abbreviations

Table 6-1 Acronyms and abbreviations

Acronyms and

Abbreviations

Full Spelling

QoS Quality of Service

CAR Committed Access Rate

CBQ Class-Based Queuing

EF Expedited Forwarding

AF Assured Forwarding

BE Best-Effort

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