The supportsave command on RUCKUS ICX devices is a comprehensive utility designed to streamline the collection and submission of diagnostic data for technical support cases. Its primary advantage over the show tech-support command is its ability to bundle all relevant information into a compressed file and upload it directly to the RUCKUS support FTP server. This is typically done by specifying a support case number, which automates a critical step in the troubleshooting workflow. The show tech-support command, in contrast, only displays information to the console, requiring the administrator to manually capture the output and transfer it.

A. Uses fewer CPU cycles during execution.

Both commands are resource-intensive as they gather extensive system data; supportsave may even use more CPU due to file compression and network transfer operations.

B. Allows the transfer of collected data to TFTP.

While supportsave does support TFTP, this is not its most unique advantage. The direct-to-RUCKUS upload is a more significant differentiator from show tech-support, whose output can be manually captured and sent via TFTP.

D. Generates automatically after a system crash.

The supportsave command is executed manually by an administrator. Automatic data collection after a system crash is handled by a separate crash dump or post-mortem debugging mechanism.

1. RUCKUS FastIron Command Reference Guide, 8.0.90:

Section: "supportsave" command description: "The supportsave command collects RAS log, OS log, and other critical system information for troubleshooting and saves the information to a file. You can then use the FTP, SCP, or TFTP option to transfer the file to a server. You can also upload the file to the RUCKUS support FTP site." This text explicitly states the capability to upload directly to the RUCKUS support site.

Syntax example: supportsave case-id is shown as a primary use case, confirming the direct integration with the RUCKUS support workflow. In contrast, the show tech-support command description in the same guide only mentions displaying information.