Cisco 500 Series - Unit Failure in Stack

Administration: Stack Management
Unit Failure in Stack
Cisco 500 Series Stackable Managed Switch Administration Guide 80
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The following shows an example of auto numbering when a new unit joins the
stack. The existing units retain their ID. The new unit receives the lowest available
ID.
Auto Number Unit
The following shows what happens when a user-assigned, master-enabled unit
with Unit ID 1 joins a stack that already has a master unit with user-assigned unit ID
1. The newer Unit 1 does not join the stack and is shutdown.
User-assigned Master-enabled Unit
Unit Failure in Stack
Failure of Master Unit
If the Master fails, the backup unit takes over the master role and continues to
operate the stack normally.