RE: Vulnerbilities of Interconnection

What kind of implact on the global internet would we see
should we observe
nearly simultaneous detonation of 500 kilogramms of high
explosives at N of the
major known interconnect facilities?

Not knowing how much damage would result from 500kg of explosives..

What is the typical size of pipe a carrier would pull into an interconnect
facility, how many carriers, how much traffic? Now how much traffic would
shift to other facilities if one went down? How many would it take to
saturate the pipes? And at what point would congestion be bad enough to
render them useless?

At some point traffic will shift over to private interconnects either
through complete loss of peering in third party facilities, or through
manual intervention.