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Displaying memory usage information ············································································································ 4-4
Displaying the fan tray operating status ·········································································································· 4-5
Displaying the power supply operating status ································································································· 4-6
Displaying router temperature information ······································································································ 4-6
Displaying transceiver module information ····································································································· 4-7
Diagnosing transceiver modules ····················································································································· 4-7
Saving the running configuration ···················································································································· 4-7
Rebooting the router or a module ··················································································································· 4-8
5 Troubleshooting ······················································································· 5-1
Power supply failure ········································································································································ 5-1
Fan tray failure ················································································································································ 5-1
Configuration terminal display issues·············································································································· 5-1
No terminal display ·································································································································· 5-2
Garbled terminal display ························································································································· 5-2
No response from the serial port ············································································································· 5-2
Interface module, cable, and connection failure ····························································································· 5-2
Symptom ················································································································································· 5-2
Solution ··················································································································································· 5-3
System failure during operation ······················································································································ 5-3
Guidelines for using the reset button ······································································································ 5-3
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