M160 Internet Router Hardware Guide
HostModuleLEDs.............. .............................. ................. 31
FPC LEDs andOfflineButton................................................. 31
Connector InterfacePanel(CIP) ................................ ................... 32
RoutingEngineManagementPorts...........................................33
BITSInputPorts................................................................34
AlarmRelayContacts..........................................................34
Power System.......................................................................35
Power Supply...................................................................36
CircuitBreakerBox............................. .............................. .38
Fuses............................................................................39
CoolingSystem.....................................................................39
CoolingSystemComponents.................................................40
AirflowthroughtheChassis...................................................40
CableManagementSystem........................................................ 41
Chapter 3 JUNOS Internet Software Overview.. 43
RoutingEngineSoftware Components......................................... ...43
RoutingProtocolProcess......................................................44
IPv4Routing Protocols....................................................44
IPv6Routing Protocols....................................................46
RoutingandForwardingTables..........................................47
RoutingPolicy .............................................................47
VPNs............................................................................48
InterfaceProcess...................................... ......................... 49
ChassisProcess ................................................................49
SNMPandMIBIIProcesses...................................................49
ManagementProcess............................................. ............. 49
RoutingEngineKernel.........................................................49
Tools forAccessingandConfiguringtheSoftware ...............................50
Tools forMonitoringtheSoftware.................................................50
SoftwareUpgrades....................................................... ........... 50
Chapter 4 System Architecture Overview.. 51
PacketForwardingEngineArchitecture...........................................51
DataFlowthrough thePacket ForwardingEngine .......................... 52
RoutingEngineArchitecture.......................................................53
RoutingEngineFunctions.......................... ........................... 54
Part 2 Initial InstallationChapter 5 Preparing for Router Installation .. 59
RackRequirements...................................... ........................... 59
RackSizeandStrength......................... .............................. .60
SpacingofMountingHoles....................................................61
Connectionto BuildingStructure................ ............................. 62
Clearance RequirementsforAirflow andHardwareMaintenance.............. 62
RoutingNodeEnvironmental Specifications.. ................................ ...62
FireSafetyRequirements..........................................................63
vi Table of Contents