OpenView Network Node Manager: Designing and Implementing an by John Blommers

By John Blommers

* Architecting, designing, enforcing, and dealing with NNM options regarding networks, computing device pcs, and UNIX servers * All examples were utilized in real implementations * Covers potential making plans, firewall upkeep, cross-platform and best-practice issuesThe purely entire, sensible advisor to HP community Node Manager!HP's OpenView community Node supervisor (NNM) is the industry's strongest platform for enterprise-wide IP community administration in accordance with SNMP criteria. Now, one in all HP's top NNM experts has written the definitive, best-practices advisor to imposing and coping with OpenView NNM.OpenView community Node supervisor covers making plans, structure, deployment, configuration, management, staffing, functionality, firewalls, troubleshooting, and extra. additionally it is 8 varied case experiences, immediately from the author's broad NNM event in nearly each community setting: international brands, machine organisations, consultancies, engineering and medical businesses, schools, and lots of extra. insurance contains: * Enterprise-class NNM deployment making plans: requisites, operations agreements, sizing and choice, piloting, and past * Staffing, education, administration domain names, and organizing community administration for max potency * Deploying trustworthy, actual, constant and potential area identify providers * Autodiscovering your community, refining the consequences to mirror your topology, and dealing with community maps * NNM daily upkeep, occasion and function administration, optimization, and problem-solvingFrom daily management to long term concepts, protection to cross-platform concerns, John Blommers can provide particular solutions you could depend on to maximise the worth of OpenView NNM-and all of your firm community.

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The solution is to issue an xnmsnmpconf - clearCache command to clear the SNMP configuration cache. This should be done when the names and IP addresses of SNMP-managed devices change and NNM does not track the change. It may be necessary to delete the offending device from all maps before clearing the SNMP configuration cache. When the NNM database is deleted in preparation for a starting over discovery, it is also prudent to clear the SNMP configuration cache. I l@ve RuBoard I l@ve RuBoard Primary, Secondary, and Other Mysteries With the emergence of BIND (Berkeley Internet Name Daemon) version 8, terms like primary server and secondary server are replaced by master server and slave server, respectively.

NNM may have backed off its discovery aggressiveness, or the netmon configuration checks may be scheduled for a time later than you care to wait. Usually, you have a good idea which device has the necessary information and can direct NNM to poll the node at once. The Poll Node menu item, formerly called Demand Poll, brings up a GUI that is equivalent to the command line nmdemandpoll. It forces netmon to immediately interrogate the device for its basic configuration, interface table, routing table, and ARP cache.

Despite your best efforts at strategy during first discovery, many things will go very wrong. Among them: • unexpected devices will be discovered • faceless icons will appear • local network managers will say you re overloading equipment • devices will be undiscovered • subnets will be dangling and unconnected to anything • overlap with other domains 37 38 • rampant discovery of undesired devices • bad subnet masks will turn up • routing problems will present themselves • the netmon daemon may spin or core dump • X-sessions and GUIs will lock up Each of these mistakes, problems, and issues can be dealt with during the pilot project.

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