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18-10
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-17256-03, Cisco MDS NX-OS Release 4.x
Chapter 18 Managing System Hardware
About Crossbar Management
Caution Taking the crossbar out of service may cause a supervisor switchover.
To perform a graceful shutdown of integrated crossbars on the supervisor module in a Cisco MDS 9509
or 9506 Director using Device Manager, follow these steps:
Step 1 Right-click the integrated crossbar switching module.
You see the context menu for that module.
Step 2 Select Out of Service to gracefully shut down the integrated crossbar switching module.
Note To reactivate the integrated crossbar module, you must remove and reinsert or replace the
crossbar module.
Caution Taking the crossbar out of service may cause a supervisor switchover.
Backward Compatibility for Generation 1 Modules in Cisco MDS 9513 Directors
To provide backward compatibility for a Generation 1 module in a Cisco MDS 9513 chassis, the active
and backup Supervisor-2 modules are associated to a specific crossbar module. The Supervisor-2 module
in slot 7 is associated with crossbar module 1 and Supervisor-2 module in slot 8 is associated with
crossbar module 2. You must plan for the following operational considerations before removing crossbar
modules:
• Whenever a crossbar module associated with the active Supervisor-2 module goes offline or is
brought online in a system that is already online, a stateful supervisor switchover occurs. This
switchover does not disrupt traffic. Events that cause a crossbar module to go offline include the
following:
–
Out-of-service requests
–
Physical removal
–
Errors
• Supervisor-2 module switchovers do not occur if the crossbar switching module associated with the
backup Supervisor-2 module goes offline.
Note Supervisor-2 module switchovers do not occur when removing crossbar switch modules on a Cisco MDS
9513 that only has Generation 2 modules installed.
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