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Upgrade method
Upgrade object
Description
Software upgrade by
installing hotfixes
System software
•
Hotfix is a fast, cost-effective method to repair software
defects of a device.
•
Compared with software version upgrade, hotfix can
upgrade the software without interrupting the running
services of the device. In other words, it can repair the
software defects of the current version without rebooting
the device.
•
The patch files match the switch model and software
version. If they are not matched, the hotfixing operation
fails.
In-Service Software
Upgrade (ISSU)
System software
•
ISSU enables software upgrade and ensures continues
packet forwarding.
•
For more information, see the chapter “ISSU
configuration.”
Software upgrade through a system reboot
Upgrading Boot ROM through a system reboot
Follow these steps to upgrade Boot ROM:
1.
Copy the Boot ROM image to the root directory of the device's storage media by using FTP or
TFTP.
2.
Specify the Boot ROM image to be used at the next boot at the CLI.
3.
Reboot the device to make the specified Boot ROM image take effect.
The Boot ROM image of member switches varies with devices, so users are easily confused when
upgrading Boot ROM. With the validity check function enabled, the device can strictly check the Boot
ROM upgrade files for correctness and the version configuration information to ensure a successful
upgrade.
Follow these steps to upgrade Boot ROM:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enable the validity check function
when upgrading Boot ROM
bootrom-update security-check
enable
Optional
By default, the validity check
function is enabled at the time of
upgrading Boot ROM.
Return to user view
quit
—
Upgrade Boot ROM on member
switches
bootrom
update
file
file-url
slot
slot-number-list
Required
Available in user view.
CAUTION:
To execute the
bootrom
command successfully, save the Boot ROM image in the storage media’s root
directory on a member switch.