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Does anyone known of any good Linux tools for visualizing networks that change (quickly) with time. I'm interested in things like:
I have root access to all the nodes (so I can run daemons on them all). Also, assume that I either have a management network that is stable or I will collect data and then analyze it offline.
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OpenNMS runs on a LAMP stack has both manual and automatic mapping capability. I can't say it is trivial to setup up, but it's an incredibly flexible and featureful platform with a very active community. You could setup Threshold Alerts for things like latency between nodes, dropped routes, lost paths, etc.
Zenmap (the GUI version the famous namp) has a nice topology mapping feature. Although, it will only generate a one time map and will not automatically update or give you threshold alerting. It will however, with five minutes worth of time, give you a quick and dirty topology map.
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The best way to analyze that is imho to look at the statistic counters of the network devices involed (switches/routers). This is called netflow analysis - there seem to be free and commercial tools around for this. | |||
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