Network Management Networking Management Overview 1 Objectives Explain

Network Management Networking Management Overview 1

Objectives • • Explain term network management What is involved in network management Importance of network management Challenges posed by network management IT 4333/6723 Network Management 2

Defining Network Management • Activities associated with running a network, along with the technology required to support those activities – – operation administration (track of resources) maintenance (repairs and upgrades) provisioning (configuring resources, setting up new services) IT 4333/6723 Network Management 3

Network Management • Systems and Applications support use and control • Activities and Operational Procedures • Categories: – Network Management – Systems Management – Application Management • What is the reason to distinguish? IT 4333/6723 Network Management 4

Network Management: Goals • • Operate the network at the lowest cost Provide better customer experience Guarantee the highest quality of service Roll out services fast and efficiently • What is the ultimate goal of network management? IT 4333/6723 Network Management 5

Network Management: Cost • Minimize the total cost of ownership (TCO) – equipment cost (amortized over several years) – operational cost (operating personnel, electricity, etc) • Some reasons for high TCO (cisco. com): – – – Hardware diversity Configuration and support complexities Security and regulatory demands Conflicting performance criteria of equipment Higher costs for incremental services Higher recurring expenses: power, carrier tariff, cooling, and rack space – Multiple maintenance contracts IT 4333/6723 Network Management 6

Network Management: Tools • Types: – – Network testing and troubleshooting tools Systems that facilitate turn-up of services automate provisioning Performance reporting tools and bottleneck analysis • Benefits? IT 4333/6723 Network Management 7

Network Management: Quality • Bandwidth that it is effectively available • Reliability and the availability of a communication service • Ways to improve: – – redundant hardware redundant communication path rerouting traffic systems for end-to-end provisioning of a service – performance trend analysis – alarm correlation capabilities (identification of the root cause) IT 4333/6723 Network Management 8

How to quantify the return on investment in network (with respect to quality) • One possibility is to consider opportunity cost, the cost if quality is not met. • Examples: – lost revenue from customers taking their business elsewhere – increased networking cost from inefficient utilization or network resources – higher operational cost IT 4333/6723 Network Management 9

Network Management: Revenue • NM can open market opportunities that would not exist without it. • Examples: – reduced time between order and service setup (keep more customers) – offer management-related capabilities (attract more customers) – cost savings might make certain services feasible (e. g. DSL for residential customers) IT 4333/6723 Network Management 10

Who is interested in Network Management • Network Management Users – Service providers (make living out of running networks; many customers; generate revenue) – Enterprise IT department (provide services at the lowest cost possible; one customer; no revenue) – End users (network managers: plan, design, select equipment, etc) • Providers of Network Management – Equipment vendors (capability to manage networking equipment) – Third-party application vendors – System Integrator (management applications with a specific network and operations support environment) IT 4333/6723 Network Management 11

Network Management Complexities • More devices, more types of equipment, more users, more services -> more relevant network management • Network Management should not be an afterthought. Why? • Challenges that are not recognized imply risks. Why? IT 4333/6723 Network Management 12

Network Management: Technical Challenges • Application characteristics – transaction based systems (provisioning might include several units of work) – interrupt driven systems (monitoring alarms) – number crunching systems (traffic analysis and forecast) • Scale – Moore’s law http: //en. wikipedia. org/wiki/Image: Moores_law. svg • Does it still work? • • Moore's Law is dead, says Gordon Moore http: //www. techworld. com/news/operating-systems/moores-law-is-deadsays-gordon-moore-3576581/ The end of Moore's law http: //www. economist. com/blogs/economist-explains/2015/04/economist-explains-17 – – operations concurrency event propagation scoping distribution and addressing • Cross-Section of technologies – information modeling, databases, distributed systems, communication protocols, use interfaces, etc. • Integration IT 4333/6723 Network Management 13

Network Management: Organization and Operation Challenges • Tasks and functions – – – network planning network operations workforce management order management billing - network deployment - network maintenance - inventory management - customer help desk • Geographical distribution • Operational procedures – Example: quality standards ISO 9000 • procedures for key processes in the business; • monitoring processes to ensure they are effective; • documentation; • check the quality; • facilitating continual improvement; • Business continuity and disaster recovery planning IT 4333/6723 Network Management 14

Review Questions 1. Provide examples of how network management can help an enterprise IT department save money. 2. Provide examples of how network management can help a service provider to increase revenue. 3. Device goes offline for 5 min. How it affects availability % • • Month? Year? IT 4333/6723 Network Management 15