Upgrading system software through a system reboot
Follow these steps to upgrade system software through a system reboot:
To do… | Use the command… | Remarks |
Save the system software image to
the root directory of the Flash of the — switch by using FTP, TFTP, or other approaches.
Required
For more information about FTP or TFTP, see the chapters “FTP configuration” and “TFTP configuration.”
Specify system software image to be used at the next boot of the switch
Required | |
{ main backup } | Available in user view. |
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| The slot keyword specifies the ID | |
Reboot the switch | reboot [ slot | of a switch. The switch ID can | |
only be 1. | |||
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| Available in user view. | |
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CAUTION:
•You must save the file to be used at the next switch boot in the root directory of the switch. You can copy or move a file to change the path of it to the root directory.
•To execute the
Software upgrade by installing hotfixes
Hotfix can repair software defects of the current version without rebooting the device, protecting the running services of the device from being interrupted.
Basic concepts in hotfix
Patch and patch file
A patch, also called “patch unit”, is a package used to fix software defects. Patches are usually released as patch files. A patch file may contain one or more patches for different defects. After loaded from the storage medium to the memory patch area, each patch is assigned a unique number, which starts from 1, for identification, management and operation. For example, if a patch file has three patch units, they are numbered as 1, 2, and 3 respectively.
Incremental patch
An incremental patch means that the patch is dependent on the previous patch units. For example, if a patch file has three patch units, patch 3 can be run only after patch 1 and 2 take effect. You cannot run patch 3 separately.
Currently released patches are all incremental patches.
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