Reference Guide

Stacking S-Series Switches | 721
Recover from a Card Mismatch State on an S-Series Stack
A card mismatch occurs if the stack has a provision for the lowest available stack number which does not
match the model of a newly added unit (Figure 39-24). To recover, disconnect the new unit. Then, either:
• remove the provision from the stack, then reconnect the standalone unit, or
• renumber the standalone unit with another available stack number on the stack.