Data collection: routes Passive collection of network critical control protocol OSPF is link-state so collect link state adverts Completely passive, modulo configuration Process data to recover network events and topology Data collected for (local, backbone) areas (20 days) –LSA DB size: (700, 1048) LSAs ~ (21, 34) kB –Event totals: (2526, 3238) events ~ (5.3, 6.7) evts/hr Small, generally stable with bursts of activity
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