web-based 網路管理

Web-based Web-based 網路管理網路管理

陳彥錚陳彥錚 ((Yen-Cheng Chen)Yen-Cheng Chen)

暨南國際大學資訊管理學系暨南國際大學資訊管理學系[email protected]@ncnu.edu.tw

http://www.im.ncnu.edu.tw/ycchen/http://www.im.ncnu.edu.tw/ycchen/

大綱大綱

• WWWWWW技術與網路管理技術與網路管理• 網路管理實務網路管理實務

WWWWWW 技術與網路管理技術與網路管理• Web-Based Application ModelWeb-Based Application Model

HTTP HTTPHTTP

ServerServer

Applet

HTMLCGI,CGI,ASPASP App.

HSocket,RMI,

CORBA,DCOM

App.

App.

Applet

Database

WWWWWWClientClient

WWWWWWServerServer

Why Web-Based Applications?Why Web-Based Applications?

• Client-Server BaseClient-Server Base• Universal ClientUniversal Client• Rich Multimedia ContentRich Multimedia Content• Platform IndependencePlatform Independence• Open & Common Communication Protocol Open & Common Communication Protocol • Easy Maintenance & UpdateEasy Maintenance & Update• Executable Programs Embedded Executable Programs Embedded • Distributed & Network-Centric ComputingDistributed & Network-Centric Computing

Web-Based Web-Based 網路管理網路管理WWW Client Managed

Device (Agent)WWW Server

User Interface (UI) ManagerUser Interface (UI) Manager

UI/ManagerUI/Manager Proxy Agent Proxy Agent

UI/ManagerUI/Manager

UI Manager UI Manager

UI/ManagerUI/Manager

UIUI Manager/ORB Manager/ORB

UI/Manager/ORB (ORB) UI/Manager/ORB (ORB)

UI/ManagerUI/Manager Agent with Web Server Agent with Web Server

SNMPSNMP

Proprietary ProtocolProprietary Protocol(Java RMI, Socket,…)(Java RMI, Socket,…)

Objects/ORBObjects/ORB

ORB: Object Request Broker

SNMP Support in AgentSNMP Support in Agent

HTTP serverHTTP server

AA

MM

MMHH

PP

UU

MMUU

UU

HHHTTP

HTTP

SNMP

SNMP

SNMP

U

M

H

A

P

User

Interface

Manager

HTTP Server

Proxy Agent

SNMP Agent

WWW ClientWWW Client Managed DevicesManaged Devices

Agent with Web ServerAgent with Web Server

AAUU HHHTTP

MM

AAUU HHHTTP/SNMP

MMSNMP

Design Considerations of Design Considerations of Web-Based Network ManagementWeb-Based Network Management

• General Design ConsiderationsGeneral Design Considerations• System ArchitectureSystem Architecture• User Interface DesignUser Interface Design• Database Access DesignDatabase Access Design• Event ReportingEvent Reporting• Trouble TicketTrouble Ticket• Security Management Security Management

System ArchitectureSystem Architecture

• Support SNMP ?Support SNMP ?

• Integrated with Legacy Tools/Systems ?Integrated with Legacy Tools/Systems ?

• Maintenance and Update Task ?Maintenance and Update Task ?

• Single or Multiple Users ?Single or Multiple Users ?

• Require Client Mobility ?Require Client Mobility ?

• Support CORBA/DCOM ?Support CORBA/DCOM ?

User Interface DesignUser Interface Design

• Icons for Network DevicesIcons for Network Devices

• Status of Network DevicesStatus of Network Devices

• Network ConfigurationNetwork Configuration

– Network Topology

– Hierarchical Display

How to make GUI dynamic?How to make GUI dynamic?

Animated GIF. Change browser object’s properties by JavaScript, VBScript. Java Applet (AWT, JFC), ActiveX control. Interactively load web pages from server. AJAX HTML 5

NM Data RepresentationNM Data Representation

• Gauge/ThresholdGauge/Threshold

• PiePie

Table

NM Graph RepresentationNM Graph Representation

Still Image (GIF/JPEG)

Java

JavaScript

ActiveX

0

200

400

600

800

1000

1 4 7 10 13 16 19 22

0

200

400

600

800

1000

1 4 7 10 13 16 19 22

JavaScript ExamplesJavaScript Examples

Web Client-Server CommunicationWeb Client-Server Communication

• HTTP for normal client-req-server-resp HTTP for normal client-req-server-resp communication.communication.

• Application-specific TCP/UDP socket Application-specific TCP/UDP socket communication.communication.

• Socket for server-to-client communication Socket for server-to-client communication • Java Sand Box IssuesJava Sand Box Issues• Communication among clients.Communication among clients.• CORBA/IIOP or DCOM for distributed object CORBA/IIOP or DCOM for distributed object

communication.communication.

AJAXAJAX

• Asynchronous JavaScript And XMLAsynchronous JavaScript And XML• 在在 JavaScriptJavaScript 程式中，可以使用程式中，可以使用 httphttp 連至伺服器讀連至伺服器讀

取取 xmlxml檔案。檔案。• 讀取動作於背後進行，網頁維持原畫面正常運作。讀取動作於背後進行，網頁維持原畫面正常運作。• 一旦資料從伺服器讀取後，再更新網頁內容。一旦資料從伺服器讀取後，再更新網頁內容。

Ex: gmail, google maps,…Ex: gmail, google maps,…

Event ReportingEvent Reporting

• Requirement:Requirement:When a network event/fault occurs, networkmanagers should be notified as soon as possible.

• WWW Client should be capable of passively WWW Client should be capable of passively

receiving information from WWW Server.receiving information from WWW Server.


Applet

HTTP

TCP/UDP

SNMPICMP

Server-to-Client CommunicationServer-to-Client Communication


Applet

SNMPICMP

Applet

Applet

Communication mechanism? Standard message format? Which clients are running?

Types of Alarm ReportTypes of Alarm Report

• Pure Text EventPure Text Event

• Audio AlarmAudio Alarm

• Visible AlarmVisible Alarm

• PagerPager

• E-mailE-mail

WWWBrowser

Server

Java, JavaScriptHTML, Plug-in ...

RS-232, mail, ...

Trouble TicketTrouble Ticket


SNMP

ICMP

DB

TT

網路管理實務網路管理實務• HiNetHiNet網路管理系統網路管理系統

– HiViewHiView: A Web-Based Network Management System for HiNet Backbone Network.

– HiPOPHiPOP: A Web-Based Network Management System for HiNet POP Network.

• HiNetHiNet網管應用網管應用– Government Service Network (GSN)– Taiwan Internet Exchange (TWIX)– Chunghwa Telecomm. Intranet

MailServer

DNSServer

WWWServer

... HiNet ServersHiNet Servers

............

........台北

高雄

台中新竹

桃園

出國

台南

....RouterRouter

Internet

OtherISP

ModemPool

ModemPool

Modem

BackboneBackboneSwitch

HiNet網路示意圖PoPPoP

......

...... ...

End-UserPC

Switch

NM

T1Channel

T1Channel

HiView

HiPOP

NM

RemoteAccessServer

RemoteAccessServer

PoP: Point of Presence

HiNet

HiNetCisco Routers HiNet Servers

HiView ServerHiView Clients

. . .

HiNet網路管理系統硬體架構圖

MailServer

DNSServer

WWWServer

. . .......

..............

PC UNIX UNIX

Sybase Database

System ArchitectureSystem Architecture

Web Clients

HiView Client

Network Elements

Apache WebServer

Apache WebServer

JavaApplets

HTMLPages

CGIPrograms

CGIPrograms Sybase

ServerHiView

程式HiView

程式

HiView Server

SNMPICMP

SolarisHTTPSocketJDBC

NetscapeNavigator 4.04+ Java 1.1.4

Technologies for Developing HiViewTechnologies for Developing HiView• JavaJava

– Java Management API– JDBC– JFC (Java Foundation Class)– RMI (Remote Method Invocation)

• JavaScriptJavaScript• SNMP ProgrammingSNMP Programming• Web Server Authentication and Access ControlWeb Server Authentication and Access Control• Client-Side State MaintenanceClient-Side State Maintenance• CGICGI• C, C++, PerlC, C++, Perl• Sybase DB-librarySybase DB-library

Management Features:Management Features:

• Status DisplayStatus Display• QoS MonitoringQoS Monitoring• Alarm ReportingAlarm Reporting• Trouble TicketingTrouble Ticketing• Traffic MonitoringTraffic Monitoring• System AdministrationSystem Administration

LoginLogin

Main MenuMain Menu

Status DisplayStatus DisplayName: CHT-DNS&MailType: Domain Name ServerState: NormalPacket Loss Rate: 3%Round Trip Time: 21ms

State Critical Major Minor Warning Normal Unknown

Color

>80% >60% >40% >20% <20%PacketLoss Rate

RoundTrip Time

>Threshold

Interface InformationInterface Information

QoS MonitoringQoS Monitoring

Packet Loss Rate Round Trip Time

Alarm Alarm ReportingReporting

Round Trip Time Threshold Setting

Trouble Ticketing

Audio Alarm

Pager Alarm

E-Mail Alert

Trouble TicketTrouble Ticket

Traffic MonitoringTraffic Monitoring

Traffic Data GraphTraffic Data Graph

Weekly/Monthly Weekly/Monthly Traffic Monitoring ReportTraffic Monitoring Report

Weekly/Monthly Weekly/Monthly Traffic Monitoring Report Traffic Monitoring Report (cont.)(cont.)

Access Control for Access Control for Customer Network Traffic MonitoringCustomer Network Traffic Monitoring

On-Line Traffic MonitoringOn-Line Traffic Monitoring

WebNMSWebNMS

http://www.webnms.com/webnms/index.html

結語結語

• Web-based network management systems will be Web-based network management systems will be more popular in the near future. more popular in the near future.

• Network management from ISP’s viewpoint.Network management from ISP’s viewpoint.• Provide remote access of customer’s network traffic Provide remote access of customer’s network traffic

monitoring.monitoring.• More integration with HiNet’s operations and More integration with HiNet’s operations and

services.services.

web-based 網路管理

Documents