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Network Management System Notes(In PPT'S)-Unit -8

VIEWS: 66 PAGES: 12

									             Web-Base Management
• Display on Web browser

• Economical displays

• Ubiquitous access

• Reduction in network load for non-polled
  configuration

• Web Interface vs Web-base management

• Web-based management
   • Desktop management interface
   • Web-based enterprise management
   • Java management extensions
                           Web Interface
                   Desktop PC

                  Web Browser




                    HTTP
                                       NMS Console




                   Web Server         SNMP Manager


                                          SNMP
                                NMS




              SNMP Agent              Managed Objects




               Figure 14.1 SNM P NM S with We b Inte rface




• SNMP-based NMS
• NMS database transferred to Web-server
• View with Web browser
• Protocol between NMS and network elements
  is SNMP
• HTTP between Web server and browsers
                         Proxy Server
                               Desktop PC

                              Web Browser




                                 HTTP
                                            Manager
                    Web Server
                                           Applications

                                              SNMP/
                               Proxy Server   Other




              SNMP / Other
                                        Managed Objects
                Agent




               Figure 14.2 Pr oxy Se rv e r with We b Inte r face




• Similar to Web interface
• No NMS monitor
• No GUI in manager applications
                       Embedded WBM
                                Workstation/PC

                                  Web Browser

                                   Manager
                                  Applications

                                     HTT P




          Web Server            Managed Objects




                    Figu re 14.3 Embe dd e d WBM Config uration




• Web servers are embedded in managed objects

• Data is pushed by the management agents in
  managed objects to the manager applications

• Smart agents

• Portable agents
 Desktop Management Interface
                Desktop-resident
             Management Application




            Management Interface API



    Desktop Management Interface software (DMI)     MIF
                                                  Database


             Component Interface API




                Component
                 Agents




         Figu re 14.5 DM I Infrastructure




• Industry standard generated by Desktop
  Management Task Force (DTMF)
• Started in 1992 to manage PCs
• Manages both hardware and software
• Two standards
     • Management information format (MIF),
       similar to MIB
     • Program interface with two APIs
                          DMI Functions
                     MI Interface    Indication    MI Interface   Indication
  Local Block           Client         Server         Client        Server
   Interface
  Application              RPC Support                     RPC Support

                                                                             RPC to/from
                                                                           Remote Systems
Data Block Mgmt                         RPC SUPPORT
   Interface       Management Interface Server         Indication Client


                          DMI Service Provider                                     SP/MIF
                                                                                  Database

Data Block Component
                                    Procedural Component Interface
      Interface




  Block CI            Procedural CI        Procedural CI      Procedural CI
Component               Hardware             Software           Firmware
 (HW/SW)               Component            Component          Component



                Figure 14.6 DM I Functional Block Diagram




 • Architecture has dual representation
      • Version 1 with data block component I/F
      • Version 2 with procedural component I/F
                         DMI MIB
                                      private
                                    {1 3 6 1.4}



                                    enterprises
                                        (1)



                                       dmtf
                                      (412)



                dmiMIB             dmtfStdMifs          dmtfDynOids
                  (1)                  (2)                  (3)



dmiObjects   dmiNotification    dmiConformance
   (1)            (2)                (3)


                               Figur e 14.7 DM I M IB




         • MIF specified using ASN.1 syntax
         • Can be managed by an SNMP manager
         • DMTF task expanded to specify WBEM -
           Web-based enterprise management
      Web-Based Enterprise Management
                                       Web Client




                                             Desktop PC

                                                                               SNMP Agent
                                            Web Browser
                                                                               DMI Agent
                                             Management
                                             Applications                      CIM Agent



                                                HTT P



                                                CIM
                                           Object Manager           CIM
                                             (CIMOM)               Schema



                               HTT P                               HTT P


                                                HTT P
             SNMP Provider                                                   DMI Provider


                 SNMP                                                           RPC




                 SNMP                          CIM                              DMI
             Managed Objects               Managed Objects                  Managed Objects




                                       Figur e 14.8 WBEM Archite ctur e




• WBEM based on Common Information Module,
  developed by Microsoft
• CIM is information-modeling framework intended
  to accommodate all protocols and frameworks
• Object-oriented
• Five components:
      • Web client
      • CIM object manager (CIMOM)
      • CIM schema
      • Management protocol
      • Managed objects with specific protocol
                                                 WBEM
                                         Web Client




                                               Desktop PC

                                                                                 SNMP Agent
                                              Web Browser
                                                                                 DMI Agent
                                               Management
                                               Applications                      CIM Agent



                                                  HTT P



                                                  CIM
                                             Object Manager           CIM
                                               (CIMOM)               Schema



                                 HTT P                               HTT P


                                                  HTT P
                SNMP Provider                                                  DMI Provider


                   SNMP                                                           RPC




                   SNMP                          CIM                              DMI
               Managed Objects               Managed Objects                  Managed Objects




                                         Figur e 14.8 WBEM Archite ctur e




• Web client is Web browser with management
  applications: Application requests use CIM schema
• Multiple instances of Web clients feasible
• CIM object manger mediates between Web clients,
  managed objects, and CIM schema
• Microsoft Windows Management Instrumentation
  uses Distributed Component Object Model (DCOM)
• Sun’s CIMOM uses JMX
• CIM modules:
     • Core model: high level framework
     • Common models: protocol-specific domains
     • Extension model: technology specific
              Common Information Module
                                                                                   Application Component
              ProductParentChild
                                                                                      Resource Component
    Product                                                               Com ponent
                                          ManagedSystemElement              (view s)
                                                                                         Network Component
 ProductSupport

                           ProductPhysicalElements
SupportAccess


                        C
                  System omponent


                                   PhysicalElement            LogicalElement

Realizes
                                                                        D
                                                              ServiceSAP ependency
           SystemDevi ce
                                                              ServiceAccessBySAP

Logical Device               System                   Service             ServiceAccessPoint

                                      HostedService
                                                     HostedAccessPoint



                                 Figure 14.9 WBEM CIM Co re M ode l




    • Solid lines indicate inheritances
    • Dashed lines indicate associations
    • PhysicalElement (e.g. interface card) and
      LogicalElement (IP address) subclasses of
      ManagedSystemElement
    • System is aggregate of managed system elements
    • Service access point is management, measurement,
      and configuration of a service
    • Managed system element considered as groups of
      components
               Storage Area Network: Jiro
                                        GUI
 Client Tier
                                     Web Browser




 Management Logic Tier               Jiro Platform




 Resources Tier   CIM    DMI       WMI         JMX       SNMP     Other



                               Figur e 14.14 Jiro Archite cture


• Jiro (pronounced gyro) is a platform for managing
  storage area network
• Three-tier architecture
• Jiro core specifies Jiro platform
     • Object model supports distributed objects based
       on Java object model
     • Component model is a set of core components
       used to build portable applications
                      Looking Ahead
• Future network and system management
  frameworks should accommodate well-established
  SNMP entities

• Web agents are intelligent and future points to
  the use of Web technology

• Web-based management offers two options

• WBEM is comprehensive and centralized approach
  to enterprise management; accommodates both
  scalar and object-oriented schemes

• JMX is decentralized and uses Java technology;
  agents embedded in objects and can be downloaded
  from NMS; platform independent

• Future NMS environment could be a merger of the
  old and the new - at least in the near future

								
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