The Research Of Policy Framework For Business Environments

Business environment is a type of computer network which consists of many kinds of network device that support different network technologies and by which business organizations operate theire business activities. To manage such a complex business environment, the traditional network management system meets many problems. For example, network administrator must acquire network technologies, learn device configuring and have to configurate devices one by one, which spend much time, manpower, and money. The traditional network management system can't configrate network quickly and consistently and change behavior of network dynamicly and in time. The effect of the traditional network management system can't meet the business requirements of business environments finally.This paper makes use of policy-based network management (PBNM) technology to resolve the business environments management problems by which are brought on by the combination between device-heterogeneous network and buseness requirements. At first, this paper introduces the IETF policy framework standard. Describe four basic components, that is, policy management tool (PMT), policy repository, policy decision point (PDP), policy enforcement point (PEP) and policy protocols which are used for communication between the components. Secondly analyse the business requirements, network tehnologies, network devices and network topologies of four classic organizations-enterprise intranet, enterprise extranet, internet service provider (ISP) and application service provider (ASP), and then from these characteristics abstract high-level policy, middle-level policy and low-level policy, and contract managed object models, policy models and other models of four business environments. Thirdly consider the context of four business environments, design the policy frameworks for PBNM system four business environments based on IETF policy framework.Finally, map object models to light directory access protocol (LDAP) directory system. Then, implement a PBNM system based on the policy framework for enterprise intranet.