Concept Guide
Figure 115. Switch A1–1 is Down
Consider the following illustration where both stack ports on A1-1 are down. When it happens, A1-1 becomes a standalone Master unit and
A1-2 and A1-3 form a separate stack. A2-1 is not notied of this change because A1-1 continues to send LACP PDUs with the old stack
Master unit MAC address. As Server1 is not aware of the stack link failure in A1-1, it continues to send trac leading to trac loss.
Figure 116. Both Stack Links are Down
Stacking
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