This figure shows a stack with a bad link B. This stack partitions into two stacks, and switch 1 and switch 3
are stack masters.
Figure 15: Partitioned Stack with a Failover Condition
Power-On Sequence for Switch Stacks
Consider these guidelines before you power on the switches in a stack:
•
The sequence in which the switches are first powered on might affect the switch that becomes the stack
master.
•
If you want a particular switch to be the stack master, power on that switch first. This switch becomes
the stack master and remains the stack master until a master reelection. After 2 minutes, power on the
other stack switches.
•
If you have no preference as to which switch becomes the stack master, power on all the switches in the
stack within a 1-minute timeframe. These switches participate in the stack master election. Switches
powered on after the 1-minute timeframe do not participate in the election.
•
Power off a switch before you add it to or remove it from an existing switch stack.
For conditions that can cause a stack master reelection or to manually elect the stack master, see the Catalyst
2960-X Switch Stacking Configuration Guide or Catalyst 2960-XR Switch Stacking Configuration Guide on
Cisco.com.
Installing the Switch
Rack-Mounting
Installation in other than 19-inch racks requires a bracket kit not included with the switch.
Catalyst 2960-X and 2960-XR Switch Hardware Installation Guide
OL-28309-02 33
Switch Installation
Power-On Sequence for Switch Stacks
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