Power On Sequence For Switch Stacks - Casio Catalyst 3750-E Installation Manual

Chapter 2 Switch Installation
Figure 2-7
In Figure
and does not have redundant connections. In
two stacks, and switch 1 and switch 3 are stack masters.
Figure 2-7
A
C
Figure 2-8
A

Power On Sequence for Switch Stacks

Consider these guidelines before you power on the switches in a stack:
•
•
•
•
For conditions that can cause a stack master re-election or to manually elect the stack master, see the
"Managing Switch Stacks" chapter in the switch software configuration guide on Cisco.com.
OL-9774-04
and Figure 2-8 show examples of stacks of Catalyst 3750-E switches with failover conditions.
2-7, the StackWise cable is bad in link B; therefore, this stack provides only half bandwidth
Example of a Stack with a Failover Condition
B
Example of a Partitioned Stack with a Failover Condition
B
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 become the stack master, power on that switch first. This switch
becomes the stack master and remains the stack master until a master re-election is required. After
1 minute, power on the other switches in the stack.
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.
Figure 2-8, link B is bad; therefore, this stack partitions into
Catalyst 3750-E and Catalyst 3560-E Switch Hardware Installation Guide
Stack Cabling Configurations
2-9