Upgrading software by performing a warm reboot
You can perform a warm reboot only when the device is operating as a standalone device.
You can perform a warm reboot in the following situations:
Upgrade Comware images without upgrading the Boot ROM. The warm-reboot method directly loads and executes Comware software images in the memory instead of booting the Comware images from the Boot ROM. Compared to upgrading software through the boot-loader command, warm reboot reduces the service downtime.
Upgrade only a specific image, for example, upgrade only the system image. When you upgrade feature images through warm reboot, you only need to specify upgrade images for features you are upgrading. The warm-reboot method replaces the old images for the specific features instead of overwriting the entire software list as does the boot-loader command.
The system checks for software version incompatibility during the warm reboot. If any incompatibility exists, software upgrade fails.
Perform this task in user view.
Step | Command | Remarks |
---|---|---|
1. Save the running configuration. | save | This step ensures that any configuration you have made can survive a reboot. |
2. Specify main startup images for the device and perform a warm reboot. |
| Upgrade files must be saved in the root directory of the storage medium. If the storage medium is partitioned, save the files to the root directory of the first partition. If you do not specify upgrade files, the switch reboots without upgrading software. |
3. (Optional.) Verify the software image settings. | display boot-loader [ slot slot-number ] | Verify that the current software images are the same as the startup software images. |