Cisco MDS 9000 Family Release Notes for Cisco MDS SAN-OS Release 3.3(2) (OL-14116-10 C0, November 2008)

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Cisco MDS 9000 Family Release Notes for Cisco MDS SAN-OS Release 3.3(2)
OL-14116-10
Downgrading Your Cisco MDS SAN-OS Software Image
– 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 “Upgrading with IVR Enabled” section
on page 18 for these instructions.
– FICON: If you have FICON enabled, the downgrade path is different. See Table 10.
Use Table 9 to determine the nondisruptive downgrade path from Cisco SAN-OS Release 3.3(2). Find
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 Table 9 applies only to Fibre Channel switching traffic.
Downgrading system software disrupts IP and SSM intelligent services traffic.
Table 9 Nondisruptive Downgrade Path from SAN-OS Release 3.3(2)
To SAN-OS Release Nondisruptive Downgrade Path
SAN-OS 3.3(1c) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.3(1a) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.2(3a) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.2(3) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.2(2c) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.2(1a) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.1(4) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.1(3a) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.1(2b) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.1 You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.1(2) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.1(1) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.0(3a) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.0(3) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.0(2a) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.0(2) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 3.0(1) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 2.1(3) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).
SAN-OS 2.1(2e) You can nondisruptively downgrade directly from SAN-OS Release 3.3(2).