ii
Logging in to the router and configuring basic settings··························································································26
Login methods································································································································································· 26
Logging in through the console port ···························································································································· 26
Setting up a configuration environment ·············································································································· 26
Creating a hyperterminal connection and setting terminal parameters ·························································· 27
Powering on the router ·················································································································································· 30
Checking before power-on··································································································································· 30
Checking after power-on ······································································································································ 30
Displaying boot information································································································································· 30
Logging in to the router through Telnet························································································································ 31
Logging to the router through the AUX port ················································································································ 31
Configuring basic settings············································································································································· 32
Hardware management and maintenance ··············································································································33
Displaying hardware information of the router··········································································································· 33
Displaying software and hardware version information of the router····························································· 33
Displaying operational statistics of the router ···································································································· 34
Displaying detailed information about interface modules ················································································ 34
Displaying the electrical label information of the router ··················································································· 35
Displaying the CPU usage of the router·············································································································· 36
Displaying the memory usage of the router········································································································ 36
Displaying the CF card information ···················································································································· 36
Displaying the operational status of the fans ····································································································· 37
Displaying the operational status of a power module······················································································· 37
Displaying the temperature alarm thresholds for an interface module····································································· 38
Configuring a combo interface ···································································································································· 38
Displaying transceiver module information and alarming information ···································································· 39
Solving system faults ······················································································································································ 40
Solving system faults ············································································································································· 40
Viewing the system fault solving method ············································································································ 41
Saving the running configuration of the router ··········································································································· 41
Rebooting the router ······················································································································································ 41
Replacement procedures ···········································································································································43
Safety recommendations ··············································································································································· 43
Replacing a HIM ···························································································································································· 43
Replacing an MIM ························································································································································· 44
Replacing a CF card······················································································································································ 44
Replacing a transceiver module ··································································································································· 45
Replacing a memory module ········································································································································ 46
When to replace a memory module ··················································································································· 46
Replacement procedure ········································································································································ 46
Opening the router chassis cover························································································································ 47
Memory module structure ····································································································································· 49
Memory module slot·············································································································································· 50
Removing a memory module································································································································ 50
Installing a memory module ································································································································· 50
Troubleshooting··························································································································································52
Power supply system failure·········································································································································· 52
Fan failure······································································································································································· 52
Configuration terminal problems·································································································································· 53
No terminal display ·············································································································································· 53
Garbled terminal display······································································································································ 53
No response from the serial port························································································································· 53
Password loss ································································································································································· 53
