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Table 23: Field-Replaceable Units
Hot-Pluggable FRUsHot-Removable and Hot-Insertable FRUs
Master Switch Control Board (SCB) (if
redundant)
Master Routing Engine (if redundant)
Switch Control Board (SCB) (nonredundant)
Routing Engine (nonredundant)
Air filter
Craft interface
Backup Switch Control Board (SCB) (if
redundant)
Backup Routing Engine (if redundant)
Dense Port Concentrators (DPCs)
AC and DC power supplies (if redundant)
Fan tray
Tools and Parts Required
To replace hardware components, you need the tools and parts listed in
Table 24 on page 88.
Table 24: Tools and Parts Required
ComponentsTool or part
Cables and connectors
DC power supply
3/8-in. nut driver or socket wrench
SCB
DPC
Power supply
Routing Engine
Blank panels (if component is not
reinstalled)
Craft Interface
SCB
DPC
Routing Engine
Electrostatic bag or antistatic mat
AllElectrostatic discharge (ESD)
grounding wrist strap
Cables and connectors
DPC
Flat-blade (–) screwdriver
88 ■ Tools and Parts Required
MX240 Ethernet Services Router Hardware Guide