MX2020 Field-Replaceable Units
Field-replaceable units (FRUs) are router components that can be replaced at the customer site (see Table 1). 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.
Before you replace most host subsystem components, such as the Control Board and Routing Engine (CB-RE), you must take the host subsystem offline. You must power off the Control Board and Routing Engine (CB-RE) before replacing a CompactFlash card or solid-state drive in a Routing Engine.
Table 1 lists the FRUs for the MX2020 router.
Table 1: Field-Replaceable Units
Hot-Removable and Hot-Insertable FRUs