iii
Rebooting a module or router ······································································································································· 66
Replacement procedures ··········································································································································· 68
Safety recommendations ··············································································································································· 68
Replacing a power module ··········································································································································· 68
Replacing an MPU ························································································································································· 69
Prerequisites ··························································································································································· 69
Replacing an RPE-X1 MPU ··································································································································· 69
Replacing an RSE-X1 MPU ··································································································································· 69
Replacing an MCP ························································································································································· 70
Replacing a FIP module ················································································································································· 71
Replacing a SAP/OAP module ···································································································································· 71
Replacing a HIM ···························································································································································· 72
Replacing a MIM ··························································································································································· 73
Replacing a CF card ······················································································································································ 73
Replacing a transceiver module ··································································································································· 74
Replacing a fan tray ······················································································································································ 75
Replacing an air filter ···················································································································································· 76
Replacing a memory module ········································································································································ 77
When to replace a memory module ··················································································································· 78
Memory module structure ····································································································································· 79
Memory module slot ·············································································································································· 80
Replacing a memory module ······························································································································· 80
Troubleshooting ·························································································································································· 82
MPU failures ··································································································································································· 82
RUN LED is off ······················································································································································· 82
RUN LED fast flashes ············································································································································· 82
ALM LED is steady on or flashes ·························································································································· 82
FIP module failures ························································································································································· 83
RUN LED is off ······················································································································································· 83
RUN LED fast flashes ············································································································································· 83
Power module failures ··················································································································································· 84
Power LED is off ····················································································································································· 84
Red power LED is on ············································································································································· 84
Fan failures ····································································································································································· 84
Fan tray is absent ·················································································································································· 84
ALM LED is red ······················································································································································ 85
HIM/MIM failures ·························································································································································· 85
Configuration system problems ···································································································································· 85
No terminal display ·············································································································································· 85
Garbled terminal display ······································································································································ 86
No response from the serial port ························································································································· 86
Dealing with password loss ·········································································································································· 86
Examining the state of password recovery capability ······················································································· 87
Dealing with console login password loss when password recovery capability is enabled ························ 88
Dealing with user privilege level password loss when password recovery capability is enabled ··············· 89
Dealing with password loss when password recovery capability is disabled ··············································· 90
Cooling system failure ··················································································································································· 91
Interface module, cable, and connection failure ········································································································ 92
Software upgrade failures ············································································································································· 92
No response from the serial port of the MPU ····································································································· 92
TFTP upgrade failure ············································································································································· 92
FTP upgrade failure ··············································································································································· 93
System software image file missing errors ·················································································································· 93
