Fiber in a ring? Now you've given me flashbacks of FDDI (https://en.wikipedia.org/wiki/Fiber_Distributed_Data_Interface https://en.wikipedia.org/wiki/Fiber_Dist

Fiber in a ring? Now you've given me flashbacks of FDDI (https://en.wikipedia.org/wiki/Fiber_Distributed_Data_Interface https://en.wikipedia.org/wiki/Fiber_Distributed_Data_Interfa...). The nice thing about FDDI was it could tolerate one node failure, because it has two rings. (Each node has two fiberoptic cables to both its neighbors.) If a node fails, its neighbors just send traffic the other direction.