Fabric OS Administrator’s Guide
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Firmware download process overview
9
Upgrading and downgrading firmware
Upgrading
means installing a newer version of firmware.
Downgrading
means installing an older
version of firmware.
In most cases, you will be
upgrading
firmware; that is, installing a newer firmware version than the
one you are currently running. However, some circumstances may require installing an older
version; that is,
downgrading
the firmware. The procedures in this section assume that you are
upgrading firmware, but they work for downgrading as well, provided the old and new firmware
versions are compatible. Always reference the latest release notes for updates that may exist
regarding downgrades under particular circumstances.
For details on Administrative Domains and the firmware download process, refer to
Chapter 17,
“Managing Administrative Domains”
for more information.
For details about testing and restoring firmware, refer to
“Testing and restoring firmware on
Backbones”
on page 270.
Passwordless firmware download
You can download firmware without a password using the sshutil command for public key
authentication when SSH is selected. The switch must be configured to install the private key, and
then you must export the public key to the remote host. Before running the firmwareDownload
command, you must first configure the SSH protocol to permit passwordless logins for outgoing
authentication as described in
“Configuring outgoing SSH authentication”
on page 181.
Considerations for FICON CUP environments
To prevent channel errors during nondisruptive firmware installation, the switch CUP port must be
taken offline from all host systems.
HA sync state
High Availability (HA) synchronization occurs when two CPs in a Backbone are synchronized. This
state provides redundancy and a nondisruptive firmware download. In order for a firmware
download to successfully occur, the two CPs in a Backbone must be in sync.
If the CPs have mixed versions when you enter the firmwareDownload command, the CPs may not
be in HA sync. In this case, you must enter the firmwareDownload –s command first to upgrade or
downgrade the standby CP to the same level as the active CP, and then upgrade the CPs to the
desired version of firmware.
NOTE
Do not run mixed firmware levels on CPs.
Table 49
shows the sync state of a Backbone that has different Fabric OS versions installed on the
active and standby CPs. Use the table to determine if you need to use the firmwareDownload -s
command.
Summary of Contents for Fabric OS 7.1.0
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Page 132: ...132 Fabric OS Administrator s Guide 53 1002745 02 Frame Redirection 4 ...
Page 194: ...194 Fabric OS Administrator s Guide 53 1002745 02 Ports and applications used by switches 6 ...
Page 254: ...254 Fabric OS Administrator s Guide 53 1002745 02 Brocade configuration form 8 ...
Page 274: ...274 Fabric OS Administrator s Guide 53 1002745 02 Validating a firmware download 9 ...
Page 302: ...302 Fabric OS Administrator s Guide 53 1002745 02 Creating a logical fabric using XISLs 10 ...
Page 344: ...344 Fabric OS Administrator s Guide 53 1002745 02 Concurrent zone transactions 11 ...
Page 374: ...374 Fabric OS Administrator s Guide 53 1002745 02 Setting up TI over FCR sample procedure 12 ...
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Page 490: ...490 Fabric OS Administrator s Guide 53 1002745 02 Ports on Demand 18 ...
Page 498: ...498 Fabric OS Administrator s Guide 53 1002745 02 Supported topologies for ICL connections 19 ...
Page 626: ...626 Fabric OS Administrator s Guide 53 1002745 02 Preparing a switch for FIPS B ...
Page 630: ...630 Fabric OS Administrator s Guide 53 1002745 02 Hexadecimal Conversion C ...
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