Sysloader And Dual Boot - Nokia ESB26 User Manual

Sysloader and Dual Boot

Dual Boot
ESB26 supports the dual boot feature that allows booting from either of two available images.
Dual boot is used when you want to store two different software versions on the device.
When it is needed to upgrade the software version, the old version may remain on the device.
This feature enables the switch to start when the download of a new image version has failed
and defected the internal FLASH . The boot procedure could be set to three modes of booting:
• Primary
Starts the primary application that is saved on the first internal FLASH memory.
If the application is missing or it is corrupt, the boot process stops and the device
enters the Sysloader CLI.
• Secondary
Starts the secondary application that is saved on the second internal FLASH
memory. If the application is missing or it is corrupt, the boot process stops and
the device enters the Sysloader CLI.
• Auto
Starts first the primary application and if it fails the second application is
activated. If both applications fail to start, the device enters the Sysloader CLI.
Images
Images that are provided to customers contain system loader and application image at the
same time. When upgrading from a single boot version the image is downloaded as an
ordinary image and after rebooting it upgrades the system to dual boot. After the upgrade only
the primary image will persist. The upgrade procedure includes the Sysloader and the
application using the same image.
SysLoader
When starting, the Sysloader counts down 5 seconds, allowing the user an entry point into the
Sysloader's Command Line Interface (CLI). The Sysloader then passes to interactive mode,
requests a login password, and starts a CLI session. If no key is pressed, the auto-startup of
the switch application is performed.
While the switch reboots you will see numbers on the console terminal after the line "Press
any key to stop auto-boot...". To enter the Sysloader mode press any key while the numbers
are running.
device_name#reload no-save
Proceed with reload ? [y/n] : y
Rebooting ...mu
MN700004 Rev 01
APPENDIX
Loader, Sysloader and Dual Boot
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