Avaya BayStack Operating System Switching Software (BoSS 3.1) for BayStack 460, 470 Uwaga Pobierz pdf (Strona 44)

215148-D

Stacking enhancement

Faulty unit and cable detection

When the operation mode is pure, the stack manager can detect the scenario

whereby a unit appears good to its neighboring units (its up and downstream

clocks are good) but the data packets it transmits or receives are corrupted or

missing. In such a scenario, the stack falls apart and the ring check does not

succeed.

This triggers the “Ring Discovery” algorithm whereby units are polled both

downstream and upstream individually to isolate the point of failure. When the

failure is isolated, the bad unit or cables are wrapped out.

In the case where a cable has bad data pins, the stack ports where the cable is

connected are wrapped out. On a unit that has its IN port connected to the bad

cable, the system log shows “IN stack port wrapped; check for bad cable or unit”

and its downstream LED stays amber.

Similarly on the unit that has its OUT port connected to the bad cable, the system

log shows “OUT stack port wrapped; check for bad cable or unit” and its upstream

LED stays amber. When replacing a bad cable with a good one, at least one unit

should be rebooted so that the stack manager on the base unit detects a unit

coming in and re-runs the stack.

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Avaya BayStack Operating System Switching Software (BoSS 3.1) for BayStack 460, 470 Uwaga Strona 44