CANOGA PERKINS 9171 Metro Ethernet Routing Switch - Manual (Page 23)

Chapter 7 Maintenance and Troubleshooting
7.1 Loading Failure Processing:
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.
7.2 User Password Lost
If system password is lost or forgotten, the following method can be used to reset password:
 Enter uBoot operation mode; see Chapter 5 for how to enter;
 Input boot_flash_nopass command to start system in uBoot mode;
Note: After using boot_flash_nopass command, system will clear up the startup-config files; before
starting this operation, the startup-config files will be stored in flash: / startup-config.conf.old file.
7.3 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:
 The power line of switch is connected correctly.
 EPS of switch matches the power required by switch .

7.4 Configuration System Troubleshooting:
After the switch is powered on, if system is normal, the startup information will be displayed on the
configuration terminal; If the configuration system is faulty, the configuration terminal may display no
information or hashes.
 No information on the terminal: After power-on, if no display information on configuration terminal
appears, please check if: