I don't think your understanding is correct. I think they're supposed to be allowed to "optimize" the BGP routes that they advertise to their customer (Alleghen

I don't think your understanding is correct. I think they're supposed to be allowed to "optimize" the BGP routes that they advertise to their customer (Allegheny). I'm unclear on whether Allegheny should have relayed that advertisement to Verizon, but it's clear that Verizon should definitely not have then broadcasted that to everyone else.