Gracefully Shutting Down A Crossbar; Backward Compatibility For Generation 1 Modules In Cisco Mds 9513 Directors - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Chapter 11 Managing System Hardware
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
You can mix and match Generation 1 and Generation 2 hardware on the Cisco MDS 9500 Series
Directors running Cisco MDS SAN-OS 3.0(1) or later without compromising the integrity and
availability of your SANs based on Cisco MDS 9500 Series Directors.
To realize these benefits, you must consider the following operational requirements when removing
crossbars for maintenance activities:
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•

Gracefully Shutting Down a Crossbar

You must perform a graceful shutdown of a crossbar (integrated or external) before removing it from the
MDS 9500 Series Director.
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•
Taking the crossbar out-of-service may cause a supervisor switchover.
Caution

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:
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OL-18084-01, Cisco MDS NX-OS Release 4.x
Gracefully Shutting Down a Crossbar, page 11-15
Backward Compatibility for Generation 1 Modules in Cisco MDS 9513 Directors, page 11-15
You must enter the EXEC mode out-of-service xbar command for a graceful shutdown of external
crossbar modules in a Cisco MDS 9513 Director.
out-of-service xbar slot
Where slot indicates the external crossbar module slot number.
To reactivate the external crossbar module, you must remove and reinsert or replace the
Note
crossbar module.
You must enter the EXEC mode out-of-service module command for a graceful shutdown of
integrated crossbars on the supervisor module in a Cisco MDS 9506 or 9509 Director.
out-of-service module slot
Where slot indicates the chassis slot number on either the Supervisor-1 module or the Supervisor-2
module in which the integrated crossbar resides.
To reactivate the integrated crossbar, you must remove and reinsert or replace the
Note
Supervisor-1 module or Supervisor-2 module.
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
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About Crossbar Management
Cisco MDS 9000 Family CLI Configuration Guide
11-15