Juniper Networks MX240 manual Replacing Hardware Components, Field-Replaceable Units FRUs

Chapter 13

Replacing Hardware Components

This chapter explains how to replace hardware components on the router. It discusses the following topics:

■Field-Replaceable Units (FRUs) on page 87

■Tools and Parts Required on page 88

■Replacing the Craft Interface on page 89

■Replacing Cooling System Components on page 92

■Replacing Host Subsystem Components on page 96

■Replacing a Routing Engine on page 102

■Replacing Connections to Routing Engine Interface Ports on page 104

■Replacing DPCs and Transceivers on page 106

■Replacing Power System Components on page 112

■Replacing the Cable Management System on page 121

Field-Replaceable Units (FRUs)

Field-replaceable units (FRUs) are router components that can be replaced at the customer site. Replacing most FRUs requires minimal router downtime. The router uses the following types of FRUs:

■Hot-removable and hot-insertable FRUs—You can remove and replace these components without powering off the router or disrupting the routing functions.

■Hot-pluggable FRUs—You can remove and replace these components without powering off the router, but the routing functions of the system are interrupted when the component is removed.

Table 23 on page 88 lists the FRUs for the MX240 router. Before you replace an SCB or a Routing Engine, you must take the host subsystem offline (see “Taking the Host Subsystem Offline” on page 96).

Field-Replaceable Units (FRUs) ■ 87