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T640 Field-Replaceable Units

 

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 down the router, but the routing functions of the system are interrupted when the component is removed.

Note

Before you replace most host subsystem components, such as a control board or Routing Engine, you must take the host subsystem offline. However, it is not necessary to halt the host subsystem to insert or remove a PC card.

You must power off the Routing Engine before replacing a CompactFlash card or solid-state disk in a Routing Engine.

Table 1 lists the FRUs for the router.

Table 1: Field-Replaceable Units

Hot-Removable and Hot-Insertable FRUs

Hot-Pluggable FRUs

Air filters

Craft Interface

Flexible PIC Concentrators (FPCs)

Front and rear fan trays

Physical Interface Cards (PICs)

Power supplies

Backup SONET Clock Generators (SCGs)

Switch Interface Boards (SIBs)

Master control board (if nonstop active routing is configured)

Backup control board

Backup Routing Engine

Connector Interface Panel (CIP)

Nonredundant control board

Master control board (if nonstop active routing is not configured)

Nonredundant Routing Engine

Master Routing Engine (if nonstop active routing is not configured)

Master and nonredundant SCGs