Redundant Cascade Stacking Feature
BayStack
Figure 6 shows an example of how a stack configuration reacts to a failed or powered down unit in the stack configuration:
a.As shown in Figure 6 unit 3 becomes nonoperational.
This can be the result of a failed unit, or simply because the unit was powered down.
b.Unit 2 and unit 4, directly upstream and downstream from unit 3, sense the loss of link signals from unit 3.
c.Unit 2 and unit 4 automatically loop their internal stack signals (A and B).
The Cas Up LED for unit 2 and the Cas Dwn LED for unit 4 turn on (yellow) to indicate the stack signals are looped.
d.The remaining stack units remain connected.
Although the example shown in Figure 6 shows a failed unit causing the stack to loop signals at the points of failure (A and B), the system reacts the same way if a cable is removed (either deliberately or accidently).
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