DELL N20xx User Manual

Page of 462
Getting Started Guide
23
4
If you are using a redundant or external DC power supply, such as the Dell 
Networking RPS720 or Dell Networking MPS1000, connect the DC power 
cable to the DC receptacle located on the back panel. In Figure 1-11 on 
page 23, the r
edundant power supply feed is in the middle and is labeled 
RPS.
Figure 1-11.
AC and DC Power Connection to an N2048 Switch
Booting the N20xx Switch
When the power is turned on with the local terminal already connected, the 
switch goes through a power-on self-test (POST). POST runs every time the 
switch is initialized and checks hardware components to determine if the 
switch is fully operational before completely booting. If POST detects a 
critical problem, the program flow stops. If POST passes successfully, valid 
firmware is loaded into RAM. POST messages are displayed on the terminal 
and indicate test success or failure. The boot process runs for approximately 
60 seconds.
You can invoke the Boot menu after the first part of the POST is completed. 
From the Boot menu, you can perform configuration tasks such as resetting 
the system to factory defaults, activating the backup image, or recovering a 
password. For more information about the Boot menu functions, see the CLI 
Reference Guide.
 
To DC Power Source (Optional)
 To AC Power Source