On 25/01/2011, at 2:13 PM, Aaron Riemer wrote: > Hi Lincoln, > >> yes, >> swltch 2 would consider the interface to be operationally down (loss of > light). >> switch 1 is still receiving light. > > If the interface is considered to be operationally down why does it still > transmit light out its TX path?? This is what is confusing me.
because if it did not you'd have a chicken/egg situation. if switch #2 did not send light to switch #1 because it was not receiving it, you'd never get link-up in the first place. this is what protocols like UDLD, BFD, STP, routing protocols et al all confirm there is bidirectional connectivity. cheers, lincoln. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
