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Redundant Cascade Stacking Feature
BayStack 400-ST1 Cascade Modules allow you to connect
up to 8 units into a redundant cascade stack. If any single
unit fails or if a cable is accidently disconnected, other
units in the stack remain operational, without interruption.
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
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
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).
Figure 6
unit 3 becomes
Figure 6
14
shows a failed
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