analysis of BGP updates
now we look at granularity of individual BGP updates
RouteViews started archiving October 2001
we analyze BGP updates over one month (Nov 2001)
15 min updates per file, 22 peers contribute
Contribution sizes span an order of magnitude
use 50K cutoff to avoid events like full-table transmission
leaves about 90% of all time intervals (2434 out of 2711)
and about 2/3 of all packets

Results:
Announcements more frequent than withdrawals
Many whole table transmissions, O(100K) prefixes
Weekly and diurnal variations clearly visible
Match traffic pattern on the 'Net
Traffic load translates into path fluctuations
Is it human intervention or automatic tools output?