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Software Upgrade Methods
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 .
To preserve the FC IDs in your configuration, verify that the persistent FC ID feature is enable before
Note
rebooting. This feature is enable by default. In earlier releases, the default is disabled. See the
FC IDs" section on page
Software Upgrade Methods
You can upgrade software without any disruptions using the Cisco MDS SAN-OS software designed for
mission-critical high availability environments. To realize the benefits of nondisruptive upgrades on the
Cisco MDS 9500 Directors, we highly recommend that you install dual supervisor modules.
You can upgrade any switch in the Cisco MDS 9000 Family using one of the following methods:
•
•
The install all command compares and presents the results of the compatibility before proceeding with
Tip
the installation. You can exit if you do not want to proceed with these changes.
In some cases, regardless of which process you use, the software upgrades may be disruptive. These
exception scenarios can occur under the following conditions:
•
•
Determining Software Compatibility
If the running image and the image you want to install are incompatible, the software reports the
incompatibility. In some cases, you may decide to proceed with this installation. If the active and the
standby supervisor modules run different versions of the image, both images may be HA compatible in
some cases and incompatible in others.
Compatibility is established based on the image and configuration:
•
•
Cisco MDS 9000 Family Configuration Guide
6-4
14-9.
Automated, one-step upgrade using the install all command. This upgrade is nondisruptive for
directors in the Cisco MDS 9500 Series (see the
Quick, one-step upgrade using the reload command. This upgrade is disruptive (see the
Upgrade" section on page
A single supervisor system with kickstart or system image changes.
A dual supervisor system with incompatible system software images.
Image incompatibility—The running image and the image to be installed are not compatible.
Configuration incompatibility—There is a possible compatibility if certain features in the running
image are turned off as they are not supported in the image to be installed. The image to be installed
is considered incompatible with the running image if one of the following statements is true:
–
An incompatible feature is enabled in the image to be installed and it is not available in the
running image and may cause the switch to move into an inconsistent state. In this case, the
incompatibility is strict.
An incompatible feature is enabled in the image to be installed and it is not available in the
–
running image and does not cause the switch to move into an inconsistent state. In this case, the
incompatibility is loose.
"Automated Upgrades" section on page
6-25).
Chapter 6
Software Images
"Persistent
OL-6973-03, Cisco MDS SAN-OS Release 2.x
6-5).
"Quick
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