HP Cisco MDS 8/24c Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Rel - Page 17

Downgrading Your Cisco MDS SAN-OS Software Image Send documentation comments to [email protected] Use Table 12 to determine the nondisruptive upgrade path for FICON-certified releases. Find the image release number you are currently using in the Current Release with FICON Enabled column of the table and follow the recommended path. Table 12 FICON Nondisruptive Upgrade Path Current Release with FICON Enabled Upgrade Path NX-OS Release 4.2(1b) You can nondisruptively upgrade directly to NX-OS Release 4.2(7b). NX-OS Release 4.1(1c) You can nondisruptively upgrade directly to NX-OS Release 4.2(1b). SAN-OS Release 3.3(1c) You can nondisruptively upgrade directly to NX-OS Release 4.2(1b). SAN-OS Release 3.2(2c), First upgrade to SAN-OS Release 3.3(1c), and then upgrade to NX-OS 3.0(3b), 3.0(3), and 3.0(2). Release 4.2(1b). 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: • Downgrading Guidelines Specific to NX-OS Release 5.2(1), page 18 • General Downgrading Guidelines, page 19 Downgrading Guidelines Specific to NX-OS Release 5.2(1) The following guideline applies to a downgrade from Cisco MDS NX-OS Release 5.2(1): • You cannot nondisruptively downgrade from NX-OS Release 5.2(1) to NX-OS Release 5.0(x) if you installed NX-OS Release 5.2(1) on an MDS 9509 or MDS 9506 switch and you installed a Generation 4 module in the switch and performed a full switch reload. The reason for this restriction is the change in fabric mode that occurs following the switch reload with the Generation 4 hardware installed. The downgrade will be disruptive, even if you remove the Generation 4 module prior to starting the downgrade. If you do not install Generation 4 hardware or perform a full switch reload following the installation of NX-OS Release 5.2(1) on an MDS 9509 or MDS 9506 switch, then you can nondisruptively downgrade to NX-OS Release 5.0(x). • We recommend that you delete any SPAN configuration, Fibre Channel tunnel, or tunnel-ID map configuration from your switch before you downgrade from NX-OS Release 5.2(1) to a lower version. If any SPAN session, SPAN destination, SPAN target, or Fibre Channel tunnel interface is configured, the installer should detect it and prompt you to delete these configurations. To gather information about SPAN sessions and delete them, use the following commands in this order: - show incompatibility systems bootflash:image_name to display any incompatible configurations - show span session to check the current configuration for a SPAN session - no span session session-number to delete a SPAN session OL-25090-01 Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 5.2(1) 17