DELL N20xx User Manual
48
Getting Started Guide
Figure 1-23.
Connecting a Stack of Switches
The stack in Figure 1-23 is connected in a ring topology and has the following
physical connections between the switches:
physical connections between the switches:
•
The bottom mini-SAS port on Unit 1 is connected to the top mini-SAS
port on Unit 2.
port on Unit 2.
•
The bottom mini-SAS port on Unit 2 is connected to the top mini-SAS
port on Unit 3.
port on Unit 3.
•
The bottom mini-SAS port on Unit 3 is connected to the top mini-SAS
port on Unit 1.
port on Unit 1.
Stacking Standby
The stacking feature supports a Standby or backup unit that assumes the
Master unit role if the Master unit in the stack fails. As soon as a Master
failure is detected in the stack, the Standby unit initializes the control plane
and enables all other stack units with the current configuration. The Standby
unit maintains a synchronized copy of the running configuration for the
stack. The Standby unit is automatically selected in the stack; however, you
can use the CLI to select a different stack member as Standby. See the User’s
Configuration Guide or the CLI Reference Guide for more information.
Master unit role if the Master unit in the stack fails. As soon as a Master
failure is detected in the stack, the Standby unit initializes the control plane
and enables all other stack units with the current configuration. The Standby
unit maintains a synchronized copy of the running configuration for the
stack. The Standby unit is automatically selected in the stack; however, you
can use the CLI to select a different stack member as Standby. See the User’s
Configuration Guide or the CLI Reference Guide for more information.
Unit 1
Unit 2
Unit 3