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Lifecycle of network management[]
This slide describes the lifecycle of network management}. D. Comer said that "Intuitively, network management encompasses tasks associated with planning, deploying, configuring, operating, monitoring, tuning, repairing, and changing computer networks."(p.26 of Automated Network Management Systems: Current and Future Capabilities, Pearson, 2007 )
In the previous slide( NM vs Network Tech}), it defines NM=everything needed other than the running.
The lifecycye of network management mainly have four different phases which are shown in Figure.1. Clearly, this is very basic life cycle and more sophisticated life cycles entail additional life cycle phases, such as maintenance cycles, network upgrades, etc.
Figure 1.
Planning
Planning is the fist basic phase based on current and forecasted user needs, it must plan the network topology, taking into account resilience and redundancy. There are some important factors which should be included in planning, i.e leasing lines to interconnect different sites, determining capacities and taking the possibility of future growth into account. For today's complex network, the most important initiatives are cost and budget constraints. An enterprise also must decide which aspects of the network to run itself and which services to buy from outside service providers.(e.g. HP software automated network lifecycle management solution})
Network planning does not occur only upon initial deployment. It should occur on an ongoing basis to ensure that the network is kept up-to-date. Planning should accordingly be supported not only by offline planning tools, but by management systems that feed back information about actual utilization and performance data in the current network. This type of information can provide important data points for planning subsequent network buildout.
Deployment
Deployment is the second stage of basis phases. After planning is completed, networks need to be deployed, which means equipment must be installed and turned up. Deployment can involve its own unique set of management procedures. Many companies use the software to automatic configuration and deployment. (e.g. Smart Business Architecture for Midsize Networks by solarwinds}
Operations
After planning and deployment, the regular operation of the network follows. This phase has many of the most typical activities that are associated with network management take place.(e.g. monitoring the network, troubleshooting, conducting performance tuning, collecting performance statistics and accounting data, etc.)
- Decommissioning
Ath the end, network equipment might have to decommissioned, which is the last phase. There are many different reasons for this phase. For instances, new technologies replace old ones and lead to a general network upgrade, or requirements might have changed and certain types of network equipment are no longer needed. Note that decommissioning needs to be carefully carried out and it is not just simply switching off power and hauling the old equipment to the dump.
- Reference
A. Clemm: Network Management Fundamentals, Cisco Press, 2006