●●● ●●●● ●●●●● ●●●● What is network management? Today, networks are larger and more complicated, so more demands on network manager How to monitor and control the network effectively and timely? Management tools are needed Network-based management tools: use the network to manage the network〔 remotely) To control Simple Network Management Protocol (SNMP) Management Information Base(MIB Network Management System(NMS) o monitor Remote Monitor(RMON1) COMP4690, by Dr Xiaowen Chu, HKBU
COMP4690, by Dr Xiaowen Chu, HKBU What is network management? ⚫ Today, networks are larger and more complicated, so more demands on network manager ⚫ How to monitor and control the network effectively and timely? ⚫ Management tools are needed ⚫ Network-based management tools: use the network to manage the network (remotely) ⚫ To control ⚫ Simple Network Management Protocol (SNMP) ⚫ Management Information Base (MIB) ⚫ Network Management System (NMS) ⚫ To monitor ⚫ Remote Monitor (RMON1)
●●● ●●●● ●●●●● ●●●● What is network management? Definition by Saydam(in Journal of Networks and System Management, published in Dec 1996) Network management includes the deployment, integration and coordination of the hardware, software and human elements to monitor, test, poll, configure, analyze, evaluate and control the network and element resources to meet the real-time, operational performance and Quality of service requirements at a reasonable cost In brief Network management is mostly a combination of local and remote configuration and management with software Remote network management is accomplished when one computer is used to monitor, access, and control the configuration of other devices on the network
COMP4690, by Dr Xiaowen Chu, HKBU What is network management? Definition by Saydam (in Journal of Networks and System Management, published in Dec. 1996): Network management includes the deployment, integration and coordination of the hardware, software, and human elements to monitor, test, poll, configure, analyze, evaluate, and control the network and element resources to meet the real-time, operational performance, and Quality of Service requirements at a reasonable cost. In brief: Network management is mostly a combination of local and remote configuration and management with software. Remote network management is accomplished when one computer is used to monitor, access, and control the configuration of other devices on the network
●●● Network management ●●●● ●●●●● ●●●● ●●●●● vocabulary ●●●● agent do managing managed devices contain dato en tity managed device managed objects whose data is gathered into a network agent data) Management Information management Base miB) managed device protocol agent data agent data managed device managed device COMP4690, by Dr Xiaowen Chu, HKBU
COMP4690, by Dr Xiaowen Chu, HKBU Network management vocabulary agent data agent data agent data agent data managed device managed device managed device managed device managing entity data network management protocol managed devices contain managed objects whose data is gathered into a Management Information Base (MIB)
●●● Network management ●●●● ●●●●● ●●●● ●●●●● vocabulary ●●●● e Managed Device o Devices to be monitored/controlled, e.g., router, switch, hub, bridge workstation A managed device may have several managed objects to be managed A software(agent) is installed to provide access to information/parameters(data)about the device, which is called Management Information Base(MIB) ● Managing Entity o Used by the manager/ admin to do network management e PC, notebook terminal etc. installed with a software called Network Management System(NMS) NMs displays/analyzes data from management agents COMP4690, by Dr Xiaowen Chu, HKBU
COMP4690, by Dr Xiaowen Chu, HKBU Network management vocabulary ⚫ Managed Device ⚫ Devices to be monitored/controlled, e.g., router, switch, hub, bridge, workstation. ⚫ A managed device may have several managed objects to be managed ⚫ A software (agent) is installed to provide access to information/parameters (data) about the device, which is called Management Information Base (MIB) ⚫ Managing Entity ⚫ Used by the manager/Admin to do network management ⚫ PC, notebook, terminal, etc., installed with a software called Network Management System (NMS) ⚫ NMS displays/analyzes data from management agents
●●● Network management ●●●● ●●●●● ●●●● ●●●●● vocabulary ●●●● o Network Management Protocol Runs between the managing entity and the managed devices The managing entity can query the status of the managed devices and take actions at the devices via its agents Agents can use the protocol to inform the managing entity of exceptional events E.g., SNMP: Simple Network Management Protocol Managing agents located at managed devices are periodically queried by the managing entity through a network management protocol COMP4690, by Dr Xiaowen Chu, HKBU
COMP4690, by Dr Xiaowen Chu, HKBU Network management vocabulary ⚫ Network Management Protocol ⚫ Runs between the managing entity and the managed devices ⚫ The managing entity can query the status of the managed devices and take actions at the devices via its agents ⚫ Agents can use the protocol to inform the managing entity of exceptional events ⚫ E.g., SNMP: Simple Network Management Protocol ⚫ Managing agents located at managed devices are periodically queried by the managing entity through a network management protocol