Network Management 2. Learning Objectives. Centralized network management? School of Business Eastern Illinois University

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Antony Lawson
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1 School of Business Eastern Illinois University 2 (Week 16, Thursday 4/19/2007) Abdou Illia, Spring 2007 Learning Objectives 2 List main elements in Centralized network management Describe Centralized principles Describe Manager-Agent communications? 3 Remotely managing a network from a central point (for example a PC) : Gathering data about network performance Fine-tuning network performance Diagnosing problems Fixing problems Controlling security Etc. is possible with: Managed networking components, and Communication systems based on management protocols 1

3 Remotely managing a network from a central point (for example a PC) : Gathering data about network performance Fine-tuning network

2 Managed networking component? Software components inside Managed Switch Object Property Port 1 Port 2 Port 3 4 Value On On Off Managed ing components Have objects that can be managed remotely Include software components that gather data about their operation. Managed networking components can be printers, hubs, switches, routers, application programs, etc. 5 Switch The Manager (an application program) is used to communicate with managed components. The RMON is a stand-alone device or a software running in a switch or a router The RMON collects data on network traffic * RMON = Remote Monitoring 6 The Agents (software programs) acts on behalf of managed device The Manager doesn t communicate with the managed device, but rather with its Agent 2

components that gather data about their operation. Managed networking components can be printers, hubs, switches, routers, application programs, etc.

3 7 The MIB is a data base on objects and their characteristics (properties, etc.) There is a small MIB on managed device There is a complete MIB on the manager s computer. 8 Simple Protocol (SNMP) Command (Get, Set) Response Trap Summary Questions (Part 1) 9 1) List the main elements in centralized network management 2) Does the Manager communicate directly with the managed devices? Explain. 3) Explain the difference between a managed device and objects. 4) Where is the MIB (database) stored? 3

8 Simple Protocol (SNMP) Command (Get, Set) Response Trap Summary Questions (Part 1) 9 1) List the main elements in

4 Manager-Agent communications 10 Simple Protocol (SNMP) Communication between the Manager and Agents works through command-response cycles The Manager sends a command The Agent sends back a response Manager-Agent communications 11 Command (Get, Set) Get commands tell the Agent to retrieve certain information and return this information to the Manager. Example: Get status of port 1 and 2 on the switch Set commands tell the Agent to set a parameter (a property of an object) on the managed device. Example: Set the status of Port 2 on the switch to off. Manager-Agent communications 12 Trap Sometimes Agents do not wait for commands to send information If the Agent detects a condition the Manager should know about, it can send a Trap message to the Manager 4

Example: Get status of port 1 and 2 on the switch Set commands tell the Agent to set a parameter (a property of an object) on the managed device.

5 Summary Questions (Part 2) 13 1) In Manager-Agent communications, which device creates commands? Responses? Traps? 2) Explain the two types of commands. 3) What is a trap? 5

How To Manage A Network With Kepware

How To Manage A Network With Kepware Simple Network Management Protocol (SNMP) Products Kepware Product Offerings from Eternity Sales SNMP OPC Server: SNMP Manager used to poll SNMP Agents/Devices SNMP Agent: used to make KEPServerEX data