Figure 8. C1048P Stack in a Ring Topology
1.
C1048P stack
2.
Mini-SAS cables attached in a ring topology
The C1048P stack in Figure 8 is connected in a ring topology with the following physical connections
between port extenders. The PEs are numbered Unit 0 to Unit 2. After you power on the stack units, the
Stack Master LED on the C1048P that is elected master displays solid green.
• The bottom mini-SAS port on the top unit is connected to the top mini-SAS port on the middle unit.
• The bottom mini-SAS port on the middle unit is connected to the top mini-SAS port on the bottom
unit.
• The bottom mini-SAS port on the bottom unit is connected to the top mini-SAS port on the top unit.
C1048P Standby
A C1048P stack supports a standby or backup unit that assumes the stack master role if the master unit in
the stack fails. The parent C9010 maintains a synchronized copy of the running configuration for the
stack. When the system detects a stack-master failure, the C9010 initializes the standby unit and enables
all other stack units with the current configuration.
Although the standby unit is automatically selected in the stack, you can use the command-line interface
on the C9010 or C1048P console to manually configure a different stack member as standby. For more
information, see the
Dell Networking Configuration Guide for C9000 Series Switches
.
Powering up the C1048P
CAUTION: Read the safety information in the
Safety and Regulatory Information
manual and the
safety information for C9000 Series switches that connect to the C1048P.
Installing the Hardware
17
