HUAWEI esight. QoS White Paper. Issue 01. Date HUAWEI TECHNOLOGIES CO., LTD.

Transcription

1 HUAWEI esight QoS White Paper Issue 01 Date HUAWEI TECHNOLOGIES CO., LTD.

2 2014. 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: Website: Huawei Industrial Base Bantian, Longgang Shenzhen People's Republic of China i

3 About This Document 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 DANGER WARNING CAUTION Alerts you to a high risk hazard that could, if not avoided, result in serious injury or death. Alerts you to a medium or low risk hazard that could, if not avoided, result in moderate or minor injury. Alerts you to a potentially hazardous situation that could, if not avoided, result in equipment damage, data loss, performance deterioration, or unanticipated results. TIP NOTE Provides a tip that may help you solve a problem or save time. Provides additional information to emphasize or supplement important points in the main text. ii

4 About This Document Change History Changes between document issues are cumulative. The latest document issue contains all the changes made in earlier issues. This issue is the first official release. iii

5 Contents Contents About This Document... ii 1 Executive Summary Introduction Solution Overview Implementation Process of Collecting and Representing Service Quality Data Function Constraints Applicable Device Types Typical Applications QoS Performance Monitoring Experience Conclusion Acronyms and Abbreviations iv

6 Executive Summary 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 1

7 Introduction 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. 2

8 Solution 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 esight Voice Voice Video Data Video Data Voice service Data service Counter collection Built-in NQA probe 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. 3

9 Solution 3.2 Implementation 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 traffic behavior bh1 remark dscp ef queue ef bandwidth pct 20 statistic enable traffic behavior bh3 # remark dscp default statistic enable traffic policy dscp # classifier cos1 behavior bh1 classifier cos2 behavior bh2 classifier cos3 behavior bh3 interface GigabitEthernet0/0/1 ip address qos gts cir 9000 cbs

10 Solution 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 Applicable Device Types Device Device Type Device Version Huawei NE NE40E NE80E V600R003C00 Huawei AR AR150 AR160 AR200 AR500 AR1200 AR2200 AR3200 All versions Huawei Switch S1700 S2300 S2700 S3300 S3700 S5300 S5700 S6300 S6700 S7700 S9300 S9700 S12700 V200R003C00 Huawei CE CE5800 CE6800 CE12800 V100R003C00 H3C device AR28 A29 A46 AR49 MSR 5

11 Solution 3.4 Typical Applications QoS Performance Monitoring Figure 3-2 QoS performance monitoring EF AF BE Voice (cos1) Video (cos2) Data (cos3) esight Router A Router B Voice Monitor service quality of each QoS queue in each channel Voice Video Data Video Data Counter collection Built-in NQA probe 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 > Performance Management >Monitoring Settings as shown in Figure 3-3. Figure 3-3 Performance tab page 6

12 Solution 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. Step 4. Select a performance counter template. In the Select an index template step, select a template from the Index template drop-down list. 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. 7

13 Solution 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. 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. 8

14 Solution Figure 3-5 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 3-6 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. 9

15 Solution Figure 3-7 Viewing historical QoS data 10

16 Experience 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. 11

17 Conclusion 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. 12

18 Acronyms and Abbreviations 6 Acronyms and Abbreviations Table 6-1 Acronyms and abbreviations Acronyms Abbreviations QoS CAR CBQ EF AF BE and Full Spelling Quality of Service Committed Access Rate Class-Based Queuing Expedited Forwarding Assured Forwarding Best-Effort 13