What are the effects of disconnecting a link on a DAS or SAS connection?
If either conductor (fiber or wire) in a link is broken or disconnected or loses a transmitter or receiver the link is removed from the ring. • SAS connecting to concentrator: • Same as above. • DAS dual-homed to concentrator(s): • If A-port link breaks, usually no effect since A port is generally the backup port. (And SMT will NOT send out alert msg.) • If B-port fiber breaks, A-port will be joined into the ring after a short disruption. • DAS on trunk rings, with no bypass: • If one link breaks, then the ring will wrap. • If both links break, ring will wrap, station won’t be able to communicate. • DAS on trunk rings, with bypass: • When a bypass is switched it breaks its connections before making the new ones. This causes a temporary wrap when either inserting or removing a station from the ring. The A and B ports of the inserting station will usually be added serially, though it may appear to be simultaneous. • If any one of the four link entering the bypass breaks, the ring will wr
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- What are the effects of disconnecting a link on a DAS or SAS connection?