H3C AR 46 Series Routers Installation Manual
Chapter 1 Router Overview
1-8
Note:
Synchronous dynamic random access memory (SDRAM) is the memory where
communication data between the system and the CPU is stored when the system is
running.
Non-volatile random access memory (NVRAM) is the place where the alarm records
are stored.
Flash functions as the major file storage medium to store application program files,
anomaly information, and configuration files.
Boot ROM stores bootstrap files.
II. LED and button
Figure 1-8
Front panel of the RPU
Table 1-3
RPU LEDs and the button
LED and button
Description
RPU
System operating LED. Blinking means CPU is in normal
operation; steady ON or OFF means the CPU has failed.
FAN
Steady ON means the FAN module is operating normally.
PWR1
Steady ON means PSU 1 is operating normally, and steady
OFF means PSU 1 is not present or has failed.
RUN
(green)
PWR2
Steady ON means PSU 2 is operating normally, and steady
OFF means PSU 2 is not in place or has failed.
RPU
System fault LED. ON means the CPU has received an
alarm signal, such as a PWR or FAN alarm (due to
overtemperature, for example).
FAN
ON means the FAN module is not present or its rotation is
blocked.
PWR1
ON means PSU 1 has failed.
ALM
(red)
PWR2
ON means PSU 2 has failed.
RESET
The RPU hardware reset button.