Service Manual

During the firmware upgrade, the configuration file uploaded from firmware versions Fabric OS 7.2.x
and Fabric OS 7.3.x is allowed to download to Fabric OS v7.4.0.
During the firmware downgrade, the configuration file uploaded from v7.4.0 is allowed to download to
previous firmware versions Fabric OS 7.2.x and Fabric OS 7.3.x.
For details on Administrative Domains and the firmware download process, refer to the Managing
Administrative Domains chapter in the Fabric OS Administrator's Guide for more information.
For details about testing and restoring firmware, refer to Testing and restoring firmware on Backbones
on page 34.
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 the Configuring outgoing SSH authentication section in the Fabric OS
Administrator's Guide.
Staging the firmware download
The firmware that has been downloaded to the secondary partition using the firmwareDownload –r
command can be activated later using the firmwareActivate command. You can also download the
firmware with local mode (current CP) using the firmwareDownload –lr command and activate it later
using the firmwareActivate –l command. After the firmware is downloaded, it is incomplete until the
new firmware is activated. Perform any configuration changes before activating the new firmware. If
the switch reboots or panics, the firmware does not get affected as it is downloaded to the secondary
partition. The firmwareRestore or firmwareCommit does not start until the firmware is activated. The
firmwareActivate command can be used in both single-CP and dual-CP environments.
1. Download the firmware with any of the previously mentioned options.
2. Enter the firmwareShow command to know the status of the download.
sw0:FID128:admin> firmwareshow
Slot Name Appl Primary/Secondary Versions Status
--------------------------------------------------------------------------
4 CP0 FOS v7.4.0 ACTIVE *
v7.4.0
5 CP1 FOS v7.4.0 STANDBY
v7.4.0
* Local CP
Firmware download completed. Please activate using firmwareactivate.
3. Activate the firmware using the firmwareActivate command.
sw0:FID128:admin>firmwareactivate
This command will activate the firmware on the secondary partition
but will require that existing telnet, secure telnet or SSH sessions to be
restarted.
Do you want to continue (Y/N) [Y]:
Passwordless firmware download
20 Fabric OS Upgrade Guide
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