T320 Field-Replaceable Units

• 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.

If the router contains a redundant host subsystem, the backup control board (), and the backup Routing Engine are hot-removable and hot-insertable. Before you replace a control board or Routing Engine, you must take the host subsystem offline.

Table 1 lists the FRUs for the T320 Core Router.