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Another important topic to discuss is the impact of the network topology on your network monitoring.

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If an interface goes down does it impact the ability of the enemies to collect data from your network

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devices so as an example if you viewed the network topology in something as simple as Visio or within

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one of your management tools.

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How would an outage affect the ability of your network management system to collect data from devices

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in your network.

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If you had devices at a remote site and you wanted to collect statistics from those devices how will

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a link down affect your ability to get to those statistics.

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If there was only a single link to the remote site and you had a central network management system and

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the link went down the enemies would no longer be able to access those devices to collect data you may

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need to deploy a network management collector on the remote site to collect data remotely rather than

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trying to collect everything from a central site so this would mean as an example that you deploy a

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distributed network management architecture rather than having a single centralized network management

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system.

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This is especially true where you have multiple data centers.

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In that case you might want to deploy multiple copies of NPM one in each data center that then forwards

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data to an enterprise operation console or EOC.

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So remember if you can't get to it you can't monitor it so it's important that you keep track of your

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network topology because you need to ensure that you have reach ability status when the topology changes.