H3C Technologies H3C S5500 Series Switches - Manual (Page 63)

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Maintenance and troubleshooting
Software loading failure
The switch runs with the original software version after it has failed to load new version of software. To
identify and remove the loading failure cause, perform the following check procedure:
• Verify that the physical ports are correctly connected.
• If the physical connection is loose or incorrect, reconnect the physical ports and make another try
to load software.
• If the physical connection is secure and correct, view the loading procedure information displayed
on the HyperTerminal to check for input errors, and make another try to load software.
For example, when using XMODEM, verify that you have reset the baud rate of the HyperTerminal to
9,600 bps after loading the software with a baud rate other than 9,600 bps; when using TFTP, verify that
you have specified the correct server and switch IP addresses, the correct name of the software to be
loaded and the correct working path of TFTP server; when using FTP, verify that you have specified the
correct server and switch IP addresses, the correct name of the software to be loaded and the correct
username and password.
If software loading fails for any other cause than physical connection problems and input errors, please
contact your sales agent for help.
Power supply failure
Built-in power module failure
The S5500-28C-EI/S5500-52C-EI/S5500-28C-PWR-EI/S5500-52C-PWR-EI/S5500-28C-EI-DC use
built-in power modules.
• Each of the S5500-28C-EI, S5500-52C-EI, S5500-28C-PWR-EI and S5500-52C-PWR-EI has three
input modes, namely, AC input, RPS input and both.
• Each S5500-28C-EI-DC has three input modes, –48V DC input, RPS input, and both.
You can look at the system status LED and the RPS status LED on the front panel of the switch to identify
a power system failure. For relevant information, see
Table 29 .
Table 29 Built-in power module failure LEDs description
LED Mark Status Description
System status LED PWR Off The switch is powered off.