
ii
Powering on the router ······································································································· 29
Logging in to the router through Telnet/SSH ·················································································· 29
Logging in to the router through the AUX port ················································································ 29
Displaying the initial configuration································································································ 30
Configuring basic settings ·········································································································· 31
Replacement procedures ································································· 32
Safety recommendations ··········································································································· 32
Replacing a power supply ·········································································································· 32
Replacing a FIP module ············································································································ 32
Replacing a HIM ······················································································································ 33
Replacing a MIM······················································································································ 34
Replacing a CF card················································································································· 34
Replacing a transceiver module ·································································································· 35
Replacing a fan tray·················································································································· 36
Replacing a memory module ······································································································ 37
Memory module structure···································································································· 37
When to replace a memory module ······················································································· 38
Replacing a memory module ······························································································· 38
Hardware management and maintenance ··········································· 40
Displaying hardware information of the router ················································································ 40
Displaying the software and hardware version information of the router········································· 40
Displaying the operational statistics of the router ······································································ 41
Displaying the detailed information about a module ·································································· 41
Displaying the electrical label information of a module ······························································· 42
Displaying the CPU usage of a module ·················································································· 43
Displaying the memory usage of a module·············································································· 43
Displaying the CF card information························································································ 43
Displaying the operational status of the built-in fan ··································································· 44
Displaying the operational status of power supplies ·································································· 44
Displaying the alarming thresholds of a module ·············································································· 45
Configuring a combo interface ···································································································· 45
Combo interface overview ··································································································· 45
Configuration prerequisites·································································································· 45
Configuring a combo interface······························································································ 46
Displaying transceiver module information and alarming information ··················································· 47
Introduction to transceiver modules ······················································································· 47
Displaying transceiver module information ·············································································· 47
Displaying the alarming information or fault detection parameters for a transceiver module ··············· 47
Solving system faults ················································································································ 48
Solving system faults ········································································································· 48
Viewing the system fault solving method ················································································ 48
Saving the current configuration of the router ················································································· 48
Rebooting the router················································································································· 49
Troubleshooting ·············································································51
Router failures························································································································· 51
Power status LEDs are off··································································································· 51
RUN LED is off ················································································································· 51
RUN LED fast flashes ········································································································ 51
ALM LED is steady on or flashes ·························································································· 51
FIP module failure···················································································································· 52
Power supply failures················································································································ 52
Fan failures ···························································································································· 53
Fan tray is absent·············································································································· 53
ALM LED is red················································································································· 53
HIM/MIM failures······················································································································ 54
Configuration system problems ··································································································· 54
No terminal display ············································································································ 54
Garbled terminal display ····································································································· 54
No response from the serial port··························································································· 55