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  • Network management can be defined in general terms as the ability to have a single point of control to accomplish the tasks required to manage a network. Proactive, rather than reactive, network management will enhance network performance and availability By know the current state of your network, one can identify trends to determine how to optimize the network by changing configurations, replacing network devices, etc. NNM is an integrated tool that can manage multiple networked systems and applications from a single graphical representation of the network NNM is the foundation from which most HPOV products operate. NNM can function as solution on its own, but can also collect data for, and forward data to, other HP OpenView products.
  • When HPOV maps out your network, the map symbols change color to indicate something is wrong and provides a graphical representation of nodes on your network HPOV collects all of the information for you and maintains a current log of alarms on your network that you need to know about Information correlation helps you quickly determine the probable cause of problems Relational databases can be exported for historical analysis using your choice of statistical programs Provides report generation for an easy to understand look at your network. Great for providing Management personnel an organized view of you network trends and statistics.
  • Since SNMP is the primary protocol used for NNM’s communication, it is important to understand how the SNMP management model works.
  • The network management model consist of a network management station, managed nodes with agents, and a network management protocol. NNM uses SNMP as its standard protocol, and uses this protocol to communicate over other protocols, such as TCP/IP, IPX, and UDP A manager can retrieve management information from an agent ( The actual mechanism depends on the SNMP versions supported by the agent) A manager can also alter or set management information on the agents system ( set ) An agent can send information to the manager with an explicit request from the manager. This is called a trap or notification . Traps and notifications alert the manager to changes that occur on the agent system, such as a reboot.
  • There are six basic operations associated with SNMP - get request. Reads a value from a specific variable - getNext request. Traverse information from a table of specific variables - getBulk request. - get response. Replies to a get or a set request - set request. Writes a value into a specific variable - trap or notification . A message initiated by the agent without requiring the management station to send a request
  • Level 2 devices are those that support bridge, repeater Be aware that the map that is created through auto-discovery is not a physical representation of your network NNM uses a combination of SNMP requests and ICMP pings to find out about nodes on the network NNM needs access to the following information for node discovery -the subnet mask from the agent on the management station -the address of the default router in the management station’s route table -SNMP information from, at a minimum, the default router, and from other routers and nodes on the network -SNMP must be running for the nodes to be discovered automatically
  • A network management system can consume significant resources while performing discovery, topology monitoring, and status polling. HPOV NNM has the ability to move much of the load from the management station to one or more remote machines. HP recommends up to 5,000 objects per stand-alone management station and up to 60,000 objects for a management station with collection stations. The maximum practical number one management station can monitor is 15 to 20 collection stations.
  • Management and collection stations only refers to the role of the machine involved in the network management, and not to the software on them. A single NNM station can perform either role, or both at once. Regardless of the role it is playing (collection or management) every NNM station has the full capabilities of NNM The role of a management station is to make the network management functionality available to the users, either directly or via one or more management consoles. Must be designated as such The role of the collections station is to be a collection point in the overall network management system. A collection station typically performs topology and IP status monitoring, threshold data collection, local event correlation, and event forwarding or handling on behalf of one or more management stations. Must be designated as such
  • One of the main problems associated with managing large networks is providing access to enough operators to handle all of the objects in the map.
  • This particular view show different containers that were built, creating a specific organization to the view of the network.
  • This view grouped all routers onto a single submap so problems could be identified at a single glance
  • This view shows the capabilities of NNM – the device in the circle is an UPS that is SNMP enabled and is being actively monitored by NNM
  • In today’s technology-driven business environment, competitive advantage can be dependent upon a company’s ability to effectively implement emerging technologies. IT managers, network administrators and engineers are under increasing pressure to meet the business demands of their organizations.
  • As I said earlier, Network management can be defined in general terms as the ability to have a single point of control to accomplish the tasks required to manage a network.
  • Its easy to see how the technical advantages can translate into benefits for the business as a whole. Reduced downtime means that systems and resources are available more often which could translate into increase productivity. Historical trends could be used to chart growth in particular areas of the business. Technical and business goals work hand-in-hand
  • Hp open view

    1. 1. Network Management Presentation HP Openview Christopher Scott December 10, 2004
    2. 2. OpenView Network Node Manager (NNM)
    3. 3. OpenView Network Node Manager <ul><li>Overview </li></ul><ul><li>How it works </li></ul><ul><li>Capabilities </li></ul><ul><li>Technical and business benefits </li></ul><ul><li>Summary </li></ul>
    4. 4. <ul><li>Network management tool </li></ul><ul><li>Proactive network management </li></ul><ul><li>Provides a solid solution for managing dynamic IP networks </li></ul><ul><li>NNM is starting point for implementing a network management solution </li></ul>Network Node Manager Overview
    5. 5. What does it do? <ul><li>Dynamically maps out your network </li></ul><ul><li>Collects critical information about you network </li></ul><ul><li>Correlates the information it collect </li></ul><ul><li>Maintains a relational database </li></ul><ul><li>Provides report generation </li></ul>
    6. 6. How does it work? <ul><li>NNM uses several protocols to maintain communication with each managed device </li></ul><ul><ul><li>SNMPv1, SNMPv2 </li></ul></ul><ul><ul><li>TCP/IP, IPX </li></ul></ul><ul><ul><li>UDP </li></ul></ul><ul><ul><li>ICMP </li></ul></ul><ul><ul><li>ARP/RARP </li></ul></ul>
    7. 7. SNMP Network Mgmt Model <ul><li>Manager </li></ul><ul><ul><li>A manager is an application that executes network management operations </li></ul></ul><ul><ul><li>The manager monitors and controls agent systems </li></ul></ul><ul><li>SNMP agent </li></ul><ul><ul><li>Resides on a managed node </li></ul></ul><ul><ul><li>An application that acts on behalf of an object </li></ul></ul><ul><li>Object </li></ul><ul><ul><li>Anything that will be managed </li></ul></ul><ul><ul><ul><li>Host, router, hub, application, database </li></ul></ul></ul>
    8. 8. Manager-Agent Communication through SNMP Manager Agent MIB SNMP Request with Community Name Retrieve (get) management information Alter (set) management information SNMP Replies SNMP Traps
    9. 9. Automatic Discovery and Layout <ul><li>All IP and Level 2 devices on the network are automatically discovered and mapped </li></ul><ul><li>IPX devices are also discovered </li></ul><ul><li>Map is a logical representation of your network </li></ul><ul><li>Automatic discovery may take several hours or even overnight </li></ul>
    10. 10. Example of network discovery and layout
    11. 11. Network Discovery (cont’d) <ul><li>NNM discovers the following objects and put them on the default map </li></ul><ul><ul><li>Internet-level submap </li></ul></ul><ul><ul><ul><li>IP networks, gateways, routers and multihomed workstations </li></ul></ul></ul><ul><ul><li>Network-level submaps </li></ul></ul><ul><ul><ul><li>Bus, star and ring segments </li></ul></ul></ul><ul><ul><li>Segment-level submaps </li></ul></ul><ul><ul><ul><li>Hosts, gateways, routers, switches, hubs, and bridges </li></ul></ul></ul><ul><ul><li>Node-level submaps </li></ul></ul><ul><ul><ul><li>Network interface cards </li></ul></ul></ul>
    12. 12. Typical Submap Hierarchy
    13. 13. Distributed Internet Discovery and Monitoring (DIDM) <ul><li>Large networks may require this distributed model </li></ul><ul><li>Spreads discovery, monitoring, and polling across several Network Node Managers acting as collection stations </li></ul><ul><li>Collection stations monitor some portion of the network and inform the management station of changes </li></ul>
    14. 14. DIDM (cont’d) <ul><li>NNM </li></ul><ul><ul><li>can serve as a management station, a collection station, or both </li></ul></ul><ul><li>Management stations </li></ul><ul><ul><li>Role is to make the network management functionality available to the users </li></ul></ul><ul><li>Collection stations </li></ul><ul><ul><li>Role is to be a collection point in the overall network management system </li></ul></ul>
    15. 15. Simplified Distribution Model for NNM
    16. 16. Management Consoles <ul><li>NNM gives the ability to have 15 to 25 operators simultaneously monitoring the network </li></ul><ul><li>Operators can share one map , or have individual maps </li></ul><ul><ul><li>Individual maps create area of responsibility on the network for each operator </li></ul></ul><ul><ul><li>More efficient in large networks </li></ul></ul>
    17. 17. Multiple Management Consoles
    18. 18. Sample map views
    19. 19. Sample map views
    20. 20. Sample map views
    21. 21. Challenges to IT Service Management <ul><li>User dissatisfaction / increased user expectations </li></ul><ul><li>Deploying network services, while maintaining productivity </li></ul><ul><li>Keeping networks and systems operational 24/7/365 </li></ul><ul><li>Producing faster, more predictable response times </li></ul><ul><li>Integrating and managing complex systems in a multi-vendor environment </li></ul>
    22. 22. Technical benefits <ul><li>Network Management can help achieve those goals by: </li></ul><ul><li>Fault and Problem Management </li></ul><ul><ul><li>Reduced downtime of network systems and devices </li></ul></ul><ul><ul><li>Quick detection and correction of network problems </li></ul></ul><ul><li>Performance Management </li></ul><ul><ul><li>Ability to monitor data to anticipate problems </li></ul></ul><ul><ul><li>Log information for historical analysis </li></ul></ul>
    23. 23. Business Benefits <ul><li>Network Management can help achieve those goals through: </li></ul><ul><li>Accounting Management </li></ul><ul><ul><li>Obtains statistical information on network use </li></ul></ul><ul><ul><li>Track individual resource utilization </li></ul></ul><ul><li>Security Management </li></ul><ul><ul><li>Protects the network and its systems from unauthorized access, use, and harm </li></ul></ul>
    24. 24. Summary <ul><li>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 </li></ul><ul><li>Makes network management proactive instead of reactive </li></ul><ul><li>NNM uses SNMP to discover devices on the network and automatically manage and monitor them </li></ul><ul><li>NNM can play an integral role in achieving both the technical and business goals of an organization </li></ul>