Backward Compatibility For Generation 1 Modules In Cisco Mds 9513 Directors; About Module Temperature - HP Cisco MDS 9020 - Fabric Switch Configuration Manual

Chapter 10 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
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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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Supervisor-2 module switchovers do not occur when removing crossbar switch modules on a Cisco MDS
Note
9513 that only has Generation 2 modules installed.

About Module Temperature

Built-in, automatic sensors are provided in all switches in the Cisco MDS 9000 Family to monitor your
switch at all times.
Each module (switching and supervisor) has four sensors: 1 (outlet sensor), 2 (intake sensor), 3 (onboard
sensor), and 4 (onboard sensor). Each sensor has two thresholds (in degrees Celsius): minor and major.
OL-16184-01, Cisco MDS SAN-OS Release 3.x
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.
Note To reactivate the integrated crossbar, you must remove and reinsert or replace the
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
– Physical removal
– Errors
Supervisor-2 module switchovers do not occur if the crossbar switching module associated with the
backup Supervisor-2 module goes offline.
About Module Temperature
Cisco MDS 9000 Family CLI Configuration Guide
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