27 - lecture-week5a-corba in nm

8/2/2019 27 - Lecture-Week5a-CORBA in NM

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Telecom Network ManagementCORBA in Network Management

(Lecture Week-5a)

Aftab HussainDept. of Computer Science

CIIT [email protected]

CORBA

CORBA (Common Object Request BrokerArchitecture) allows software componentswritten in multiple computer languages andrunning on multiple computers to all worktogether.

CORBA is a standard which was defined bythe Object Management Group (OMG).


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CORBA Based Management

Common Object Request Broker Architecture (CORBA) is

an object oriented framework designed to support: A consistent programming model on a given platform and interoperability between different platforms

CORBA allows applications to communicate irrespective oflocation, or design specifics.

Object Request Broker (ORB) provides underlying platform. ORB provides access, location, failure, resource

transparency. Internet Interoperability Protocol (IIOP) specifies an RPC

over TCP/IP Interface Definition Language (IDL) for specifying

interfaces. Mapping of IDL specs exist for Java, C++, C,

SmallTalk Portable Object Adapter (POA), is a particular type of

object adapter that is defined by the CORBA specification.

CORBA Architecture


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ORB - Heart of CORBA

Object Request Broker (ORB) enables interaction between objects,hides implementation details

ORB

Applicationobjects

Horizontalfacilities

Verticalfacilities

Commonobject

services

CORBA Services

Naming Service

To access object uniquely

Trading Service

Objects can advertise interfaces

Synchronous and Asynchronous Communication

Request-response

Event Service


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CORBA Network Management

CORBA is similar to a translator in the middle of a room withpeople from all sides of the world. The translator translateseverything is said so that everyone in the room can understandwhat is being said. Every CORBA network management system,no matter how diverse it is from another, still can communicatetogether because of the CORBA software that is embedded intothe network management software.

The CORBA network management is the choice for a lot ofsmall to large businesses because it is embedded into theirnetwork devices and is capable of managing a large number ofclients at high hit rates on the internet. CORBA integratesmachines from many vendors, from sizes ranging frommainframes to desktops to hand-helds. It allows all of thesemachines to be able to communicate with each other very

easily.

Joint Inter-Domain Management (JIDM)

Joint Inter-Domain Management (JIDM) is a technology thatdefines how network management components based on CMIPand SNMP can interoperate with CORBA based components.

The JIDM specification focuses on the following points:

definition of translation algorithms between OSI orSNMP information models and CORBA IDL specifications

definition of CORBA interfaces proposing all interactionspossible in CMIP. These interfaces provide mechanismsencompassing, among others, filtering, scoping, multiple

replies, and asynchronous communication

definition of CORBA interfaces allowing all interactionspossible in SNMP


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JIDM Interworking Scenarios

CORBA

manager

CORBA

managerOSI/SNMP

agent

OSI/SNMP

agentGatewayGatewayIIOP CMIP/SNMP

OSI

manager

OSI

managerCORBA

agent

CORBA

agentGatewayGatewayCMIP IIOP

CORBA

manager

CORBA

managerCORBA

agent

CORBA

agentIIOP

CORBAmanager

CORBAmanager GatewayGatewayIIOP CMIP CORBA

agentCORBAagentGatewayGateway

IIOP

CORBA Gateway levels

Repeater: Transport translation

IIOP vs CMIP/SNMP

Bridge: Encoding

CDR vs BER

Gateway: Services and concepts

CORBA vs OSI mgmt/SNMP mgmt

Synchronous vs message-based

Single answer vs multi answer (to one operation)

Single operation vs multi operation (per message)

Connection transparent vs explicit (OSI)

Object model vs table model (SNMP)


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CORBA / OSI Interoperability

CORBA / OSI interoperability first requiresdefinition of model equivalencies between thetwo domains. This document defines howinformation models can be translated from onerepresentation to another:

ASN.1 to/from IDL

GDMO to/from IDL

SNMP SMI to IDL

CORBA BASED MANAGER

IIOP


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CORBA Manager, OSI Agent

CORBA ORB

FaultManagement

PerformanceManagement

ConfigurationManagement

CORBA Manager

IIOP

GDMOObjects

MOMO

MO

CMIP

OSI Agent

CORBA/CMIP

Gateway

OSI Stack

OSI Manager, CORBA Agent

OSI Manager

CMIS over

IIOP

CMIP

CORBA Agent

CORBA/

CMIPGateway

CORBA

Agent

Fault

Management

Performance

Management

Configuration

Management

OSI

Manager

GDMO

Objects

MOMO

MO


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CORBA Manager and Agent

CORBA Agent

CORBA

Agent

GDMO

Objects

MOMO

MO

CORBA ORB

Fault

Management

Performance

Management

Configuration

Management

CORBA Manager

CMIS over IIOP

Applying TMN, Web, CORBA, Java technologies to integrateexisting NMSs:

CORBA-based Inter-domain (CMIP, SNMP, CORBA, other)manager:

TMN management functions (alarm surveillance, trafficmonitoring, etc.)

Java-based management applications

Web server and browser

TMNTMN--based Integrated Networkbased Integrated Network

Management using Web TechnologyManagement using Web Technology


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CORBACORBA--based Interbased Inter--domain Manager Using Webdomain Manager Using Web

Agent

Agent

Agent

CORBA Sub-domainAgent

Agent

Agent

SNMP Sub-domainAgent

Agent

Agent

CMIP Sub-domain

CORBA/CMIP gateway

CORBA-based

Inter-domain Manager

HTML JAVA Applet JAVA Applet

HTTP

(CGI)

CORBA

(OrbixWeb)RMI

WEB

Browser

Object Request Broker (ORB)

CORBA/SNMP gateway

SNMP CMIP

CORBA

Web-browser

Java Applet

Object Request Broker (ORB)

Management

Functions

SNMP G/W

CMIP G/W

Other G/W

SNMP Devices

CMIP Devices

Other Devices

Protocol

Gateway

Fault

Configuration

Account

Performance

Security

Web

Server

HTTP

SNMP

CMIP

Other

Metadata

Repository

SMI

GDMO

Other

Specification

Gateway

(IDL Compiler)

Target System StructureTarget System Structure


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Detail Architecture

Systems Management Functions

TMN Functions

High-level Service Functions

CommonObject

Services

CommonObject

Services

Gateway Functions

Java Application ObjectsJava Application Objects

ManagementInformationRepository

ManagementInformationRepository

ObjectRequestBroker

ObjectRequestBroker

TransmissionPaths

Management

SwitchedSystem

Management

CustomerService

Management

AlarmSurveillanceManagement

Fault Configuration Account Performance Security

CORBA/SNMPProxy

CORBA/CMIPProxy

CORBA/Proprietary

Proxy

ObjectManagement

StateManagement

Event ReportingManagement

Accounting

Meter

LogControl

RelationshipManagement

AlarmReporting

Security AlarmReporting

SecurityAudit Trail

AccessControl

Workload

Monitoring

Test

ManagementSummarization

CommonFacilities

CommonFacilities

Proxy Coordinator

Example of Alarm Surveillance SystemWeb Browser

Web Server

Java Applets

ManagementApplication

ORB

ManagementInformation(log, html)

CORBA Objects

WBM Server

HTTP IIOP

SNMP Agent

Fault

Proxy Coordinator

SNMPGateway

CMIPGateway

OtherGateway

Config. Account Perform. Security

CMIP Agent ProprietaryAgent

Alarm Surveillance Service

Management Services


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Proposed TMN-Based Integrated Management System with CORBA

Proposed TMN-Based Integrated Management System Architecture with CORBA

Object Management Architecture

Object Request Broker

Application Objects

Common Facilities

Vertical Common Facilities

Horizontal Common Facilities

UserInterface

InformationManagement

SystemsManagement

TaskManagement

Naming PersistenceLife Cycle Properties Concurrency Collections Security Trader

Externalization Events Transactions Query Relationships TimeChange

ManagementLicensing

Common Object Services


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IDL


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CORBA Architecture


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Architecture

DII BOA

Client ORB Server ORB

ORB i/f ORB i/f

Client app. Object impl.

Client OS Server OS

Network

DII: Dynamic Invocation InterfaceBOA: Basic Object Adapter

27 - lecture-week5a-corba in nm

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