General Issues with Data


Changes in connectivity
IP renumbering sometimes breaks BGP sessions
Upstream providers change
Home-brew tools (sometimes buggy...keep raw files!)
Management
Continuous collection vs. archival (snapshots take space)
MySQL Table Corruption, Disk failures, etc.
Collection machine downtime (power outages, moves, etc.)
Complaints (pre-emption: DNS TXT record, mailing Nanog, etc.)
Collection subtleties
Keeping track of downtimes, session resets, etc.
hosts are not firewalled
Some hosts located in "core" (e.g., GBLX hosts)
iBGP sessions to border router on the same LAN