The following figure presents a graphical representation of a stack and some of the terms that describe stack conditions.
A stack is the collection of all nodes that are cabled together in a stack.
A stack topology is the set of contiguous nodes that are powered up and communicating with each other. Switch 8 is not part of the stack topology in the above figure because it is not powered up.
An active topology is the set of contiguous nodes that are active. An active node is powered up, configured for stack operation, and communicating with the other active nodes. Switch 5 in the figure above has failed, and stacking is disabled on Switch 6 and Switch 7. Switch 8 has no power, so the active topology includes switches: Switch 1, Switch 2, Switch 3, and Switch 4.
For more information on SummitStack terminology, see SummitStack Terms.
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