Brocade Fabric OS Troubleshooting and Diagnostics Guide v7.1.0 (53-1002751-01, March 2013)

56 Fabric OS Troubleshooting and Diagnostics Guide

53-1002751-01

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.

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.

This example shows hardware-related messages for a downgrade:

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.