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
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 CLI command to determine what you need to disable.
Layer 2 switching traffic is not disrupted when downgrading to Cisco SAN-OS Release 2.1(2) or
•
later.
Use the show install all impact downgrade-image CLI command to determine if your downgrade
•
will be nondisruptive.
Be aware that some features impact whether a downgrade is disruptive or nondisruptive:
•
Use
Table 8
the SAN-OS image you want to downgrade to in the To SAN-OS Release column of the table and use
the path recommended.
Note
The software downgrade information in
Downgrading system software disrupts IP and SSM intelligent services traffic.
Table 8
To SAN-OS Release Nondisruptive Downgrade Path
SAN-OS 3.3(2)
SAN-OS 3.3(1c)
SAN-OS 3.3(1a)
SAN-OS 3.2(3a)
SAN-OS 3.2(3)
SAN-OS 3.2(2c)
OL-14116-11
Fibre Channel Ports: Traffic on Fibre Channel ports can be nondisruptively downgraded. See
–
Table 8
for the nondisruptive downgrade path for all SAN-OS releases.
SSM: Intelligent services traffic on the SSM, such as SANTap, NASB, and FC write
–
acceleration, is disrupted during a downgrade. SSM Fibre Channel traffic is not.
Gigabit Ethernet Ports: Traffic on Gigabit Ethernet ports is disrupted during a downgrade.
–
This includes IPS modules and the Gigabit Ethernet ports on the MPS-14/2 module, the
MSM-18/4 module, and the MDS 9222i switch. Those nodes that are members of VSANs
traversing an FCIP ISL are impacted, and a fabric reconfiguration occurs. iSCSI initiators
connected to the Gigabit Ethernet ports lose connectivity to iSCSI targets while the downgrade
is in progress.
iSCSI: If you are downgrading from SAN-OS version 3.0(x) to a lower version of SAN-OS,
–
enable iSCSI if an IPS module, MPS-14/2 module, MSM-18/4 module, or the MDS 9222i
switch is online. Otherwise, the downgrade will disrupt traffic.
IVR: With IVR enabled, you must follow additional steps if you are downgrading from Cisco
–
SAN-OS Release 2.1.(1a), 2.1(1b), or 2.1.(2a). See the
on page 17
for these instructions.
–
FICON: If you have FICON enabled, the downgrade path is different. See
to determine the nondisruptive downgrade path from Cisco SAN-OS Release 3.3(3). Find
Nondisruptive Downgrade Path from SAN-OS Release 3.3(3)
You can nondisruptively downgrade directly from SAN-OS Release 3.3(3).
You can nondisruptively downgrade directly from SAN-OS Release 3.3(3).
You can nondisruptively downgrade directly from SAN-OS Release 3.3(3).
You can nondisruptively downgrade directly from SAN-OS Release 3.3(3).
You can nondisruptively downgrade directly from SAN-OS Release 3.3(3).
You can nondisruptively downgrade directly from SAN-OS Release 3.3(3).
Cisco MDS 9000 Family Release Notes for Cisco MDS SAN-OS Release 3.3(3)
Downgrading Your Cisco MDS SAN-OS Software Image
"Upgrading with IVR Enabled" section
Table 8
applies only to Fibre Channel switching traffic.
Table
9.
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