List of Figures
Figure 1: FrontofChassis........................................................................ 8
Figure 2: Rearof Chassis with ComponentCoverinPlace..................................... 9
Figure 3: Rearof Chassis with ComponentCoverRemoved.................................. 10
Figure 4:Midplane............................................................................... 13
Figure 5: FrontofChassiswithFour-PICFPCInstalledinSlotFPC0..........................15
Figure 6:FPC1andFPC2........................................................................18
Figure 7:PacketForwardingEngineClockGenerator.......................................... 19
Figure 8:SwitchingandForwardingModule................................................... 21
Figure 9:RoutingEngine........................................................................25
Figure 10:MiscellaneousControlSubsystem...................................................27
Figure 11: CraftInterface........................................................................28
Figure 12:LCDinIdle Mode .................................................................... 30
Figure 13:LCDinAlarmMode.................................................................. 30
Figure 14:ConnectorInterface Panel...........................................................33
Figure 15:Routing EngineInterfacePortsforHostModule0 ................................ 34
Figure 16:AlarmRelayContactsandBITS InputPorts........................................ 35
Figure 17:OriginalPowerSupply...............................................................37
Figure 18:EnhancedPowerSupply.............................................................37
Figure 19:Circuit BreakerBox.................................................................. 39
Figure 20:Airflow throughtheChassis.........................................................41
Figure 21:CableManagement System......................................................... 41
Figure 22:SystemArchitecture.............. ................................................... 51
Figure 23:PacketForwardingEngineComponentsandDataFlow...........................53
Figure 24:Routing EngineArchitecture................ ........................................ 54
Figure 25:Control Packet HandlingforRoutingandForwardingTableUpdates............. 55
Figure 26:TypicalCenter-MountRack.......................................................... 61
Figure 27:Chassis DimensionsandClearanceRequirements.................................62
Figure 28:PowerandGrounding CableLug....................................................67
Figure 29:TypicalSourceCabling totheRouter...............................................68
Figure 30:PowerandGrounding CableConnections.......................................... 70
Figure 31:Unpackingthe Router............................................................... 79
Figure 32:Removinga PowerSupply.................................................. ........86
Figure 33:RemovinganSFM........................................... ........................ 88
Figure 34:RemovinganMCS................................................................... 89
Figure 35:Removinga PCG.....................................................................90
Figure 36:Removinga Routing Engine......................................................... 91
Figure 37:RemovingtheRearUpper ImpellerAssembly..................................... 92
Figure 38:RemovingtheRearUpper ImpellerAssembly..................................... 92
Figure 39:RemovingtheRearLowerImpellerAssembly ..................................... 93
Figure 40:RemovingtheFan Tray.............................................................. 94
Figure 41:RemovinganFPC....................................................................96
Figure 42:RemovingtheFrontImpellerAssembly............................................ 97
Figure 43:Attachingthe LiftingHandle ........................................................ 98
Figure 44:Installing theChassisina Rack..................................................... 99
Figure 45:Reinstallingthe FrontImpellerAssembly....................... ..................101
Figure 46:ReinstallinganFPC.................................................................102
Figure 47:Reinstallingthe FanTray...........................................................103
Figure 48:Reinstallingthe Rear LowerImpellerAssembly...................................104
Figure 49:Reinstallingthe Rear UpperImpellerAssembly...................................105
List of Figures xiii