Release Notes

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22
)Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 5.0(1a)
OL-21012-01
Downgrading Your Cisco MDS SAN-OS Software Image
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.
– 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 “Upgrading with IVR Enabled” section
on page 19 for these instructions.
– FICON: If you have FICON enabled, the downgrade path is different. See the “FICON
Downgrade Paths” section on page 24.
Note A downgrade from NX-OS Release 4.2(1b) to SAN-OS Release 3.3(1x) is not supported on MDS
switches, when FC-Redirect based applications, such as Data Mobility Manager or Storage Media
Encryption, are configured in the fabric if either of the following conditions are satisfied:
1. A target for which FC-Redirect is configured is connected locally and there are Generation 1
modules with ISLs configured in the switch.
2. A host, for which FC-redirect is configured, is connected locally on a Generation 1 module.
If these conditions exist, remove the application configuration for these targets and hosts before
proceeding with the downgrade.