Downgrading Your Cisco Mds San-Os Software Image; Performing A Disruptive Upgrade On A Single Supervisor Mds Family Switch - Cisco AJ732A - MDS 9134 Fabric Switch Release Note

Downgrading Your Cisco MDS SAN-OS Software Image

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

Performing a Disruptive Upgrade on a Single Supervisor MDS Family Switch

Cisco MDS SAN-OS software upgrades are disruptive on the following single supervisor Cisco MDS
Family switches:
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If you are performing an upgrade on one of those switches, you should follow the nondisruptive upgrade
path shown in
ensures that the binary startup configuration remains intact.
If you do not follow the upgrade path, (for example, you upgrade directly from SAN-OS Release 2.1(2)
or earlier version to NX-OS Release 4.1), the binary startup configuration is deleted because it is not
compatible with the new image, and the ASCII startup configuration file is applied when the switch
comes up with the new upgraded image. When the ASCII startup configuration file is applied, there may
be errors. Because of this, we recommend that you follow the nondisruptive upgrade path.
Downgrading Your Cisco MDS SAN-OS Software Image
This section lists the guidelines recommended for downgrading your Cisco MDS SAN-OS software
image and includes the following topics:
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If you plan to downgrade from NX-OS 4.1(1b) to a SAN-OS 3.x release, read the instructions in the
Note
"Downgrading from NX-OS 4.x to SAN-OS 3.x" section on page 31
General Downgrading Guidelines
Use the following guidelines to nondisruptively downgrade your Cisco MDS NX-OS Release 4.1(1b):
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Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 4.1(1b)
28
MDS 9120 switch
MDS 9140 switch
MDS 9216i switch
Table 11, even though the upgrade is disruptive. Following the nondisruptive upgrade path
General Downgrading Guidelines, page 28
Downgrading from NX-OS 4.x to SAN-OS 3.x, page 31
Downgrading the SSI Image on Your SSM, page 33
Install and configure dual supervisor modules.
Issue the system no acl-adjacency-sharing execute command to disable acl adjacency usage on
Generation 2 and Generation 1 modules. If this command fails, reduce the number of zones, IVR
zones, TE ports, or a combination of these in the system and issue the command again.
Disable all features not supported by the downgrade release. Use the show incompatibility system
downgrade-image command to determine what you need to disable.
Use the show install all impact downgrade-image command to determine if your downgrade will
be nondisruptive.
Be aware that some features impact whether a downgrade is disruptive or nondisruptive:
Fibre Channel Ports: Traffic on Fibre Channel ports can be nondisruptively downgraded. See
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Table 13 for the nondisruptive downgrade path for all SAN-OS releases.
before you begin.
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