
iv
Displaying fan status ································································································································39
Displaying status of power supplies ·········································································································39
Displaying temperature alarm thresholds·································································································39
Port configuration and management················································································································40
Configuring a combo interface ·················································································································40
Displaying transceiver module information and alarm information···························································41
Active and standby MPU switchover················································································································42
Responding to system faults····························································································································43
Viewing the system fault solving method ·································································································43
Saving the current configuration ······················································································································43
Rebooting a module or router ··························································································································44
Replacement procedures·············································································· 46
Safety recommendations ·································································································································46
Replacing a power supply································································································································46
Hot-swapping a power supply ··················································································································46
Replacing an RPE-X1 MPU ·····························································································································47
Prerequisites ············································································································································47
Replacing an RPE-X1 MPU ·····················································································································47
Replacing an RSE-X1 MPU ·····························································································································48
Prerequisites ············································································································································48
Replacing an RSE-X1 MPU ·····················································································································48
Replacing an MCP-X1/X2 MPU ·······················································································································48
Replacing a FIP module···································································································································49
Replacing a SAP/OAP module ························································································································50
Replacing a HIM ··············································································································································51
Replacing a MIM ··············································································································································52
Replacing a CF card ········································································································································52
Replacing a transceiver module·······················································································································53
Replacing a fan tray ·········································································································································54
Replacing an air filter ·······································································································································55
Replacing a memory module ···························································································································56
When to replace a memory module ·········································································································56
Memory module structure ························································································································57
Memory module slot·································································································································58
Replacing a memory module ···················································································································58
Troubleshooting ···························································································· 60
MPU failures ····················································································································································60
RUN LED is off·········································································································································60
RUN LED fast flashes ······························································································································60
ALM LED is steady on or flashes ·············································································································61
No response from the MPU serial port·············································································································61
FIP module failures ··········································································································································61
RUN LED is off·········································································································································61
RUN LED fast flashes ······························································································································61
Power supply failures·······································································································································62
Power LED is off ······································································································································62
Red power LED is on ·······························································································································62
Fan failures ······················································································································································62
Fan tray is absent·····································································································································62
ALM LED is red ········································································································································63
HIM/MIM failures··············································································································································63
Configuration system problems ·······················································································································63
No terminal display···································································································································63
Garbled terminal display ··························································································································64
No response from the serial port··············································································································64
Dealing with password loss······························································································································64
Examining the state of password recovery capability ··············································································65
Dealing with user privilege level password loss when password recovery capability is enabled·············67
Dealing with password loss when password recovery capability is disabled ···········································68
Cooling system failure······································································································································69