kwe@bu-cs.BU.EDU (kwe@bu-it.bu.edu (Kent W. England)) (04/15/89)
In article <8137@boulder.Colorado.EDU> bobk@boulder.Colorado.EDU (Bob Kinne) writes: > >The purpose of the dual ring is to recover from a cut or damaged >connection between nodes. If a node fails or powers down, the >optical bypass permits the ring to continue to function in normal, >non-wrap mode, bypassing the failed or removed station. Any ring >architecture needs to provide this bypass functionality. I don't think it does. If a node fails, as opposed to a link, then the adjacent nodes wrap and the ring continues without the failed node. I guess I am just not convinced that optical bypass buys you that much. I think the hundreds and hundreds of workstations are going to be put on single ring FDDIs using star concentrators with bypass capability (not optical I think). These concentrators will be on the dual ring backbone. But that's enough on that. Just let me be in my own misguided world. I'll learn the truth soon enough.