Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 5.2(1) (OL-25090-01, July 2011)

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Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 5.2(1)
OL-25090-01
Downgrading Your Cisco MDS SAN-OS Software Image
FICON Downgrade Paths
Table 14 lists the downgrade paths for FICON releases. Find the image release number that you want to
downgrade to in the To Release with FICON Enabled column of the table and follow the recommended
downgrade path.
Table 13 Nondisruptive Downgrade Path from NX-OS Release 5.2(1)
To NX-OS or SAN-OS
Release Nondisruptive Downgrade Path
NX-OS:
All 5.0(x) releases You can nondisruptively downgrade directly from NX-OS Release 5.2(1).
1,2
1. If you install a Generation 4 module in an MDS 9509 or MDS 9506 switch and perform a full switch reload following the
installation of NX-OS Release 5.2(1), then you cannot nondisruptively download from NX-OS Release 5.2(1) to NX-OS
5.0(x).
2. A downgrade from NX-OS Release 5.2(1) disrupts and stops all FCoE traffic because FCoE requires Cisco NX-OS Release
5.2(1).
All 4.2(x) and 4.1(x)
releases
Downgrade to any NX-OS Release 5.0(x) and then downgrade to NX-OS
Release 4.2(x) or 4.1(x)
1
SAN-OS:
All 3.3(x) releases Downgrade to NX-OS Release 4.2(x) or Release 4.1(x) first, and then
downgrade to SAN-OS Release 3.3(x).
All 3.2(x), 3.1(x),
3.0(x) releases, and all
2.1(x) releases.
Downgrade to NX-OS Release 4.2(x) or Release 4.1(x) first, then downgrade
to SAN-OS Release 3.3(x), and then downgrade to Release 3.2(x), Release
3.1(x)., Release 3.0(x), or Release 2.1(x).
All 2.0(x) releases. Downgrade to NX-OS Release 4.2(x) or Release 4.1(x) first, then downgrade
to SAN-OS Release 3.3(x), then downgrade to Release 2.1(2x), and then
downgrade to Release 2.0(x).
Release 1.x Downgrade to NX-OS Release 4.2(x) or Release 4.1(x) first, then downgrade
to SAN-OS Release 3.3(x), then downgrade to SAN-OS to Release 2.1(2b),
then to Release 1.3(4a), and then downgrade to your SAN-OS 1.x release.
Table 14 FICON Downgrade Path
To Release with FICON Enabled Downgrade Path
NX-OS Release 4.2(1b) You can nondisruptively downgrade directly from NX-OS Release 4.2(7b).
NX-OS Release 4.1(1c) You can nondisruptively downgrade directly from NX-OS Release 4.2(1b).
SAN-OS 3.3(1c) You can nondisruptively downgrade directly from NX-OS Release 4.1(1c).
SAN-OS 3.2(2c) First downgrade to SAN-OS Release 3.3(1c) and then downgrade to Release
3.2(2c).
SAN-OS 3.0(3b) First downgrade to SAN-OS Release 3.3(1c) and then downgrade to Release
3.0(3b).
SAN-OS 3.0(2) First downgrade to SAN-OS Release 3.3(1c) and then downgrade to Release
3.0(2).