The auto-suggest option in the CLI provides available values on pressing tab on your keyboard. Use skip_warnings option to skip any warnings and optional must checks.
The following are the various options available for NSX Advanced Load Balancer system upgrade:
Use the upgrade system image_ref <image name> command to upgrade the system to a base image.
[admin:-controller]: >upgrade system image_ref 18.2.6-9000-20191031.063017
Use the following to upgrade the system to a base image and a controller patch.
[admin:-controller]: >upgrade system image_ref 18.2.6-9134-20191101.042535 controller_patch_ref 18.2.6-9134-2p1-20190806.011824
Use the following to upgrade the system to a base image and an SE patch.
[admin:-controller]: >upgrade system image_ref 18.2.6-9134-20191101.042535 se_patch_ref 18.2.6-9134-2p1-20190806.011824
Use the following to upgrade the system to a base image, an NSX Advanced Load Balancer Controller patch, and an SE patch.
[admin:-controller]: >upgrade system image_ref 18.2.6-9134-20191101.042535 controller_patch_ref 18.2.6-9134-2p1-20190806.011824 se_patch_ref 18.2.6-9134-2p1-20190806.011824