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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