Stack Management
Stack Changes and Unit ID Assignment
Cisco 500 Series Stackable Managed Switch Administration Guide
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•
One or more duplicate unit IDs exist. Auto numbering resolves conflicts and
assigns unit IDs. In case of manual numbering, only one unit retains its unit ID
and the other(s) are shutdown.
•
Number of units in stack exceeds maximum number of units allowed. The
new units that joined the stack are shut down, and a notification is sent to
the SYSLOG server.
Figure 7
shows an example of auto numbering when a master-enabled unit joins
the stack. There are two units with unit ID = 1. The master selection process
selects the best unit to be the master unit (it was up longer than the original one).
The other unit is made the backup.
Figure 7 Auto-numbered Master-enabled Unit
Figure 8
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.
Figure 8 Auto Number Unit
