Network Management Presentation
HP Openview
Christopher Scott
December 10, 2004
OpenView
Network Node Manager
(NNM)
OpenView
Network Node Manager
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Overview
How it works
Capabilities
Technical and business benefits
Summary
Network Node Manager
Overview
• Network management tool
• Proactive network management
• Provides a solid solution for managing
dynamic IP networks
• NNM is starting point for implementing a
network management solution
What does it do?
• Dynamically maps out your network
• Collects critical information about you
network
• Correlates the information it collect
• Maintains a relational database
• Provides report generation
How does it work?
• NNM uses several protocols to maintain
communication with each managed device
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SNMPv1, SNMPv2
TCP/IP, IPX
UDP
ICMP
ARP/RARP
SNMP Network Mgmt 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
Manager-Agent Communication
through SNMP
SNMP Request with
Community Name
Manager
SNMP Replies
SNMP Traps
Retrieve (get)
management
information
Agent
MIB
Alter (set)
management
information
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
Example of network discovery
and layout
Network Discovery (cont’d)
• 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
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
DIDM (cont’d)
• 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
Simplified Distribution Model for NNM
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
Multiple Management Consoles
Sample map views
Sample map views
Sample map views
Challenges to IT Service Management
• User dissatisfaction / increased user
expectations
• Deploying network services, while
maintaining productivity
• Keeping networks and systems operational
24/7/365
• Producing faster, more predictable response
times
• Integrating and managing complex systems
in a multi-vendor environment
Technical benefits
• Network Management can help achieve
those goals by:
• Fault and Problem Management
– Reduced downtime of network systems and
devices
– Quick detection and correction of network
problems
• Performance Management
– Ability to monitor data to anticipate problems
– Log information for historical analysis
Business Benefits
• Network Management can help achieve
those goals through:
• Accounting Management
– Obtains statistical information on network use
– Track individual resource utilization
• Security Management
– Protects the network and its systems from
unauthorized access, use, and harm
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