3
Maintaining the device
To check alarms, health status, and card status, and record failure information, log in to the device
through the console port, Telnet, or SSH. For how to log in to the device, see
Fundamentals
Configuration Guide
for the device. If you fail to log in to the device, see "
Figure 1 Maintenance flow
Checking the LED status
The device provides various LEDs to indicate the operating status of different objects. If a LED
indicates an abnormal state, record the failure information immediately and see the installation guide
for the router for how to troubleshoot and resolve the issue. If the issue persists, contact H3C
Support.
See the tables in this section to understand normal LED activity. The number and status of LEDs of
the same type for one type of card depend on the card model. For example, an MPU might provide
two fan tray status LEDs (OK and FAIL) or one fan tray status LED (OK/FAIL), depending on the
MPU model.
For more information about the descriptions of the LEDs, see the installation guide for the router.
Check LED status
Start
Check critical or minor alarms
Check card and subcard
status
An exception has
occurred?
Resolvable?
Collect information
and contact H3C
Support
Yes
No
Check device health
status
End
Yes
No
