Table21-1 Typesof maintenance for crossbar backplane unit
Configuration Active/hot Active/cold Inactive/hot Inactive/cold Systemstopped
Building block configuration
Unsupported Unsupported
(*1)
Unsupported Unsupported
(*1)
Supported(*2)
*1: Ifany physical partition is currently operating ,the cr ossbar box cannot be powered off.
*2: Allthe physical partitions must be powered off, an dthe s ystem must be completely shut down.
Table21-2 Maintenanceflow
Detailsof update process Replacement
1 Preparation 21.3
2 Removingthe crossbar backplane unit 21.4
3 Installingthe crossbar backplane unit 21.5
4 Restoringthe system 21.6
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.
XSCF> showlogs error

21.2.2 Maintenance flow

Table21-2 lists the sequence of the maintenance procedure for the crossbar backplane
unit.
21.3 Enabling the Removal of the Crossbar
Backplane Unit
Thissectio n describes the preparations that must be completed prior to removing the
crossbarbackplane unit.
1. Open the rack door.
2. LogintotheXSCFshell.
3. Executethe showlogs command to identify the component requiring
maintenance.
For details, see "3.3.5 Checking log information."
Chapter21 Maintainingthe Crossbar Backplane Unit of the Crossbar Box 345