Stack Management
Types of Units in Stack
Cisco 500 Series Stackable Managed Switch Administration Guide
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The stacked system supports redundancy in the following ways:
-
The backup unit becomes the master of the stack if the original master
fails.
-
The stack system supports two types of topologies: chain and ring. In
ring topology, if one of the stack ports fails, the stack continues to
function in chain topology.
Types of Units in Stack
A Stack consists of a maximum of four units. A unit in a stack is one of the following
types:
•
Master—The master unit’s ID must be either 1 or 2. The stack is managed
through the master unit who manages itself, the backup unit and the slave
units.
•
Backup—If the master unit fails, the backup unit assumes the master role
(switchover). The backup unit’s ID must be either 1 or 2.
•
Slave
—These units are managed by the master unit.
In order for a group of units to function as a stack, there must be a master and/or
backup unit. When the master unit fails, the stack continues to function as long as
there is a backup unit (the active unit that assumes the master role).
