OSI Systems Management, Internet SNMP, and ODP/OMG CORBA as Technologies for Telecommunications Network Management [chapter]

2010 Telecommunications Network Management  
In this chapter, we compare the ISO/ITU-T OSI Systems Management (OSI-SM) [X701], Internet Simple Network Management Protocol (SNMP) [RFC1157][RFC1905/6] and ODP/OMG Common Object Request Broker Architecture (CORBA) [CORBA] approaches to network, service and distributed applications management. The chapter also provides a tutorial overview of those technologies, but it assumes a basic understanding of data network and distributed system principles. OSI and Internet management have adopted the
more » ... nager-agent paradigm. Manageable resources are modeled by managed objects at different levels of abstraction. Managed objects encapsulate the underlying resource and offer an abstract access interface at the object boundary. The management aspects of entities such as Network Elements (NEs) and distributed applications are modeled through "clusters" of managed objects, seen collectively across a management interface. The latter is defined through the formal specification of the relevant managed object types or classes and the associated access mechanism, that is the management access service and supporting protocol stack. Management interfaces can be thought of as "exported" by applications in agent roles and "imported" by applications in manager roles. Manager applications access managed objects across interfaces in order to implement management policies. Distribution and discovery aspects are orthogonal to management interactions and are supported by other means. Both OSI and Internet management are primarily communications frameworks. Standardization affects the way in which management information is modeled and carried across systems, leaving deliberately unspecified aspects of their internal structure. The manager-agent model is shown in Figure 2 .1. Note that manager and agent applications contain other internal objects that support the implementation of relevant functionality. Since these are not visible externally, they are depicted with dotted lines. M application in Manager role application in Agent role A performing operations emitting notifications management communication protocol managed object other internal object
doi:10.1109/9780470546536.ch2 fatcat:jmisbmopmffrxgmfoqlc2nn5we