H3C S5120-SI Series Command Reference Manual page 750

Parameters
sysname: Name of the device, a string of 1 to 30 characters.
Description
Use the sysname command to set the name of the device.
Use the undo sysname demand to restore the device name to the default.
The default name is H3C.
Modifying device name affects the prompt of the CLI. For example, if the device name is Sysname, the
prompt of user view is <Sysname>.
Examples
# Set the name of the device to R2000.
<Sysname> system-view
[Sysname] sysname R2000
[R2000]
1-21