Summary of Errors Discovered in 9 ASes


Serious Errors (1st Class)
Incorrect or missing filters (~ 50 sessions)
iBGP signaling partitions (10 instances)	
Unintentional transit (3 instances)

Annoyances (2nd Class)
Inconsistent export (3 instances)
Nondeterministic settings (34 routers)
Failure to install valid routes (3 routers)

Cleanup (3rd Class)
Sessions with undefined policies (2 sessions)
Policies with undefined distribute lists, etc. (30 policies)
Incomplete iBGP sessions (76 sessions)