Note: Please use the DB-9 to RJ-45 Console cable which we provide together with this
device. Use the DB-9 to RJ-45 Console cable from other vendors maybe can’t access
this device.
Data Center, Enterprise & ISP Network Solutions
Chapter 4 Maintenance and Troubleshooting
After loading fails, the system will keep running in the original version. At this time, users should
re-check if physical port connections are good firstly. If some ports are not connected, then
re-connect them to ensure that physical connections are correct, and begin re-loading. If physical
connections are correct, then check the loading process information displayed on the super
terminal to verify if there are input errors. If there are input errors, correct them and re-load.
For example, when using TFTP protocol, we enter incorrect IP addresses of Server and Switch,
name of loading software, do not specify the correct working path of correct TFTP server and
so on; if physical connections are good, and there are no input errors in the loading process
but the loading fails finally, please contact agents for help.
4.1 Loading Failure Processing:
4.2 User Password Lost:
If system password is lost or forgotten, the following method can be used to reset password:
1. Enter uBoot operation mode. (See the further information. Refer to the Chapter 7 of Switch
Installation Guide on website for how to enter.)
2. Input boot_flash_nopass command to start system in uBoot mode.
4.3 Power System Troubleshooting:
Switch can judge if its power system is faulty according to the PWR indicator on the front panel:
when power system works normally, the PWR indicator shall always keep lighting; when the PWR
indicator is off, please check if:
1. The power line of switch is connected correctly.
2. EPS of switch matches the power required by switch.
Not all models will have all of the features described.
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