Network management is important for proactively detecting failures, monitoring traffic and resources, detecting misconfigurations, and monitoring service level agreements and intrusions. It involves managing elements like the enterprise network, servers, databases, applications, and remote access. Common network management frameworks include fault, configuration, performance, security, accounting, and more. Effective network management must address the challenges of interconnected yet separately managed systems across the IT infrastructure. It relies on agents that monitor devices and report to a central network management system which stores data and provides alerts and reports. Key protocols for communication include SNMP while newer approaches involve web-based management.

1. Network Management A Network is a complex mixture of hardware and software technologies linked by networking technologies

2. Desktop Admin LAN Infrastructure Net Mgmt WAN Net Mgmt

3. Reasons for Network Management Proactively detecting failures of equipment before the users are aware. Monitoring traffic to aid in resource deployment Detecting mis-configured elements Monitoring for SLA’s Intrusion Detection

5. Distributed IT Infrastructure Architecture Define the Components? Servers & Networks that connect Servers to each other & to the clients they serve No right/wrong way to divide processes/responsibility System Administration: Mgmt of Clients, servers, OS’s & NOS’s that allow computers to communicate Enterprise Network Management

6. Elements of IT Infrastrucuture that must be managed Enterprise network LAN Management Server Management Desktop Management Database Management Application Management Remote Access Management

7. OSI Network Management Framework Fault Management Configuration Management Performance Management Security Management Accounting Management

8. TMN Model Telecommunication Management Network standards from ITU Business Management Service Management Network Management Element Management

9. IT Infrastructure Management A Challenge as IT Infrastructure is made up of a combination of separately managed and Monitored Elements Different management tools often do not interoperate or share Data

11. Architecture Agents are S/W that runs on networking devices to monitor and report Must be compatible with the NMS NMS Compiles, Displays, Reports and Alarms Stores data in a Database Database has an Index and standardised field definitions = MIB Fields within MIBs known as Objects

12. From: SUN Solstice TMN manager White Paper

13. Protocols Protocol used to communicate between agents & NMS is SNMP Management traffic can be up to 30% Affects network you are monitoring Now available: Distributed Management sub-NMSs

14. Protocols New: Web Based Management = WBEM uses HMMP - Hypermedia Management protocol Replace SNMP and DMI? Advantages: Common Interfaces for all devices NMS is Platform Independent

15. RMON Remote Monitoring RMON Probes - An Agent that collects and reports performance statistics to an NMS

16. Network Analysers Ie Sniffer, Lanwatch Monitor at a single point on a network Can display data from most of the OSI layer separately I do not consider Physical layer testers such as cable scanners, signal quality monitors, BERT testers.

17. References Goldman Chapter 12 Kurose & Ross Stallings Chapter 19 Tanenbaum Chapter 7.3