2 1/15/ :37 Chapter 14Network Management2 Network Management Overview 0 Network Management Requirements: * Fault Management * Accounting Management * Configuration and Name Management * Performance Management * Security Management 0 Network Management Systems 0 Simple Network Management Protocol (SNMP): Basic Concepts and SNMP Protocol Specifications * SNMPv2 * SNMPv3 0 LAN-Specific Network Management 0 LAN Network Control Center
3 1/15/ :37 Chapter 14Network Management3 OSI Management Functional Areas
4 1/15/ :37 Chapter 14Network Management4 Elements of a Network Management System
5 1/15/ :37 Chapter 14Network Management5 Network Management Entity (NME) Tasks 0 Collect statistics on communications and network-related activities. 0 Store statistics locally. 0 Respond to commands from the Network Control Center (NCC), including commands to: 1. Transit collected statistics to Network Control Center. 2. Change a parameter (e.g., a timer used in a transport protocol). 3. Provide status information (e.g., parameter values, active links). 4. General artificial traffic to perform a test. 0 Send messages to the NCC when local conditions undergo a significant change.
6 1/15/ :37 Chapter 14Network Management6 Simple Network Management Protocol (SNMP) 0 Network Management Model includes the following: 0 Management Station: * MS serves as the interface for the human network manager into the network management system; * MS has a set of management applications for data analysis, fault recovery, etc. * An interface by which the NW manager may monitor and control the network. * The capability of translating the NW manager’s requirements into the actual monitoring and control of remote elements in the network. * A database of information extracted from the MIBs. 0 Management Agent: Key platforms (hosts, bridges, routers, hubs) may be equipped with SNMP so that they may be managed from a management station. 0 Management Information Base (MIB) is the collection of objects (resources or data variables) that represent aspects of the managed agent. 0 Network Management Protocol is used for linking the management station and agents. It includes the following key capacities: “Get”, “Set”, and “Notify.”
7 1/15/ :37 Chapter 14Network Management7 Network Management Protocol Specifications 0 Structure and Identification of Management Information for TCP/IP-Based Networks (RFC 1155): Describes how managed objects contained in the MIB are defined. 0 Management Information Base for Network Management for TCP/IP-Based Networks: MIB-II (RFC 1213): Describes the managed objects contained in the MIB. 0 Simple Network Management Protocol (RFC 1157): Describes the protocol used to manage these objects.
8 1/15/ :37 Chapter 14Network Management8 Role of SNMP
16 1/15/ :37 Chapter 14Network Management16 SNMPv3 Security Features
17 1/15/ :37 Chapter 14Network Management17 LAN Network Control Center Functions 0 Configuration Functions maintain a directory of names and addresses of resources (terminals, hosts, peripherals, application programs, or utility programs) available on the network. 0 Monitoring Functions (performance monitoring, network status, and accounting). 0 Fault-Isolation Functions.