Summary


Location 
Some links experience many path failures, but many experience some failures.
Failures appear more often inside ASes than between them.
Duration 
90% of failures last less than 15 minutes
70% of failures last less than 5 minutes
Correlation
BGP messages coincide with only half of the failures that reactive routing could potentially avoid.
When BGP messages and failures coincide, BGP messages most often follow failures by 4 minutes.
BGP sometimes precedes failures.