Table17-1 Typeof maintenance for XSCF unit
Configuration Active/hot Active/cold Inactive/hot Inactive/cold Systemstopped
Building block configuration
Supported(*1) Unsupported
(*2)
Supported Unsupported
(*2)
Supported(*3)
*1: TheXSCF must be configured as a slave beforemaintenance is started. If the XSCF is operating as the master XSCF,switch it to a
standbyXSCF.
*2: Ifany physical partition is currently oper ating, the crossbar box cannot be powered off.
*3: Allthe physical partitions must be powere d off, and the system must be completely shut down.
Table17-2 Maintenanceflow
Detailsof update process Replacement
1 Preparation 17.3
2 RemovinganXSCFunit 17.4
3 Installing an XSC F unit 17.5
4 Restoring th e system 17.6
Caution- Tocompletely shut down the system, all the power cords must be
removed. If the power cords are not removed, an electrical failure may occur.

17.2.2 Maintenance flow

Table17-2 lists the sequence of the mai ntenance procedure for the XSCF unit.
17.3 Enabl ing the Removal of the XSCF
Unit
Thissectio n describes the preparations that must be completed prior to removing an
XSCF unit. The preparation procedure differs depending on the maintenance type as
follows:
■Active/Hot maintenance
■Inactive/Hot maintenance
■System-stopped maintenance
Chapter17 MaintainingtheXSCF Unit of the Crossbar Box 309