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NNM Overview
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Network Management Functions
Reduced downtime of network systems and devices
Quick detection and correction of network problems without disrupting the network
The ability to monitor data to anticipate problems (predictive)
The ability to log information for historical analysis
The ability to perform an action when some pre-defined event or situation has occurred
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Fault/Problem Management
Automatically discover the IP and IPX nodes in your network.
Automatically monitor your network’s status through the map interface and the event browser interface
Manage any vendor device that supports the SNMP
Manage non-SNMP nodes that use IP or IPX protocols
Define event thresholds for MIB objects
Define actions to be taken upon receipt of an SNMP trap
Manage event storms and improve the information content of events by suppressing unwanted, redundant events
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Performance Management
Collect historical MIB information about MIB objects and events, store the data for trend analysis, and graph collected data.
Automatically set thresholds based upon standard deviations of historically collected data
Automatically collect data and generate General Availability and General Inventory reports
Manage and modify reports using the NNM Report Configuration Interface
Manage information being collected and stored in the data warehouse
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Configuration & Change Management
Store critical configuration information from devices such as routers and switches
Track inventory of the devices on the network
Generate snapshots of the network
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What does NNM do?
Maps out the network with map symbols changing color to indicate if something is wrong
Collects critical information about your network and maintains current log of alarms that you need to know about
Correlates collected information to help you quickly determine the probable cause of problems
Maintains a relational database from which data can be exported for historical analysis
Provides easy access to report generation
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How does NNM work?
NNM uses several protocols to maintain communication with each managed device– SNMPv1, SNMPv2– TCP/IP, IPX– UDP– ICMP– ARP/RARP
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NNM Management Model
Manager– A manager is an application that executes network
management operations– The manager monitors and controls agent systems
SNMP agent– Resides on a managed node– An application that acts on behalf of an object
Object– Anything that will be managed
Host, router, hub, application, database
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Manager-Agent Communication
Manager Agent MIB
SNMP Request withCommunity Name
Retrieve (get) management information
Alter (set) management information
SNMP Replies
SNMP Traps
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Automatic Discovery and Layout
All IP and Level 2 devices on the network are automatically discovered and mapped
IPX devices are also discovered Map is a logical representation of your
network Automatic discovery may take several
hours or even overnight
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Example
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Network Discovery
NNM discovers the following objects and put them on the default map– Internet-level submap
IP networks, gateways, routers and multihomed workstations
– Network-level submaps Bus, star and ring segments
– Segment-level submaps Hosts, gateways, routers, switches, hubs, and bridges
– Node-level submaps Network interface cards
Typical Submap Hierarchy
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Distributed Internet Discovery and Monitoring(DIDM)
Large networks may require this distributed model
Spreads discovery, monitoring, and polling across several Network Node Managers acting as collection stations
Collection stations monitor some portion of the network and inform the management station of changes
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DIDM
NNM – can serve as a management station, a
collection station, or both
Management stations– Role is to make the network management
functionality available to the users
Collection stations– Role is to be a collection point in the
overall network management system
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Simplified Distribution Model for NNM
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Management Consoles
NNM gives the ability to have 15 to 25 operators simultaneously monitoring the network
Operators can share one map , or have individual maps– Individual maps create area of responsibility
on the network for each operator– More efficient in large networks
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Multiple Management Consoles
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Sample map views
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Sample map views
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Sample map views
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Summary
HP OpenView NNM is a robust network management platform that can provide a graphical look into your network and provide many benefits like Fault and Problem management, Performance management, etc
Makes network management proactive instead of reactive
NNM uses SNMP to discover devices on the network and automatically manage and monitor them
NNM can play an integral role in achieving both the technical and business goals of an organization