Considerations For Downgrading Firmware; Preinstallation Messages - Brocade Communications Systems StoreFabric SN6500B Troubleshooting Manual

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Considerations for downgrading firmware

The pre-installation check of the firmwareDownload command detects all of the blocking
conditions that can prevent a successful downgrade, and warns you about all these conditions. The
error messages displayed by the firmwareDownload command states the blocking conditions and
the corresponding commands to correct them. You must address all of these blocking conditions
before proceeding. Refer to the Fabric OS Administrator's Guide for more information regarding
individual features and commands.
To avoid failure of a firmware downgrade, verify the firmware you are downgrading to supports all
the blades in the chassis, and that the switch, blades, or chassis supports all the features you are
currently using. If not, you must disable or remove those features that are not supported.

Preinstallation messages

The system messages in this section are displayed if an exception is encountered during firmware
download. The following examples show feature-related messages that you may see if you were
upgrading from v7.0.0 to v7.1.0:
NOTE
The system messages in this section are for illustration purposes only. They do not represent the
entire range of possible error messages appropriate to a wide variety of installation scenarios.
This example shows hardware-related messages for a downgrade:
56
Considerations for downgrading firmware
Cannot upgrade directly to 7.1. Please upgrade to 6.4 first and then upgrade
to 7.1.
Upgrade to 7.1 is not allowed because FC Fastwrite is not supported on this
version. Please use "fastwritecfg" to deconfigure FC Fastwrite for all slots
and try again.
Upgrade to 7.1 is not allowed due to the presence of ioddelay configuration.
Please reset the feature with "ioddelayreset" before upgrading to v7.1.
Upgrade to 7.1 is not allowed since base switch has R_RDY enabled ports.
Please disable the R_RDY enabled ports in base switch using portcfgislmode
command.
Firmware upgrade to Fabric OS 7.1.0 or higher is not allowed when there are
more than 4 chassis connected through Inter-Chassis Links (ICLs) and the
Enterprise ICL (EICL) license is not installed in the system. Note that even
with an EICL license installed, only 9 chassis are allowed to connect through
ICLs. You can either install an EICL license, or you must disable the
additional ICL links before performing a firmware upgrade.
ecp:admin> firmwaredownload
Type of Firmware (FOS, SAS, or any application) [FOS]:
Server Name or IP Address: 10.1.2.3
User Name: userfoo
File Name: /home/userfoo/v6.3.0
Network Protocol (1-auto-select, 2-FTP, 3-SCP) [1]:
Password: <hidden>
Checking System Settings...
Version compatibility check passed.
Fabric OS Troubleshooting and Diagnostics Guide
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