To upgrade the EOS running on an Arista switch, which of the following commands copies the new EOS file from USB to flash?

The correct command to copy a file from a USB drive to the internal flash memory on an Arista switch is copy usb1:/ flash:/. In Arista's Extensible Operating System (EOS), physical storage devices are accessed using specific prefixes. The internal flash memory is designated as flash:, and the first USB port is identified as usb1:. The command structure follows the copy format, making option A the syntactically and functionally correct choice for this operation.

B. copy usb:/EOS-4.15.0.swi flash:/EOS-4.15.0.swi

This is incorrect because EOS requires a specific port number (e.g., usb1, usb2) to identify the USB drive; usb: is not a valid identifier.

C. copy drive0:/EOS-4.15.0.swi flash:/EOS-4.15.0.swi

This is incorrect as drive0: is not a recognized device prefix for a USB drive within the Arista EOS file system.

D. copy usb0:/EOS-4.15.0.swi flash:/EOS-4.15.0.swi

This is incorrect because Arista EOS numbers its physical USB ports starting from 1 (e.g., usb1), not 0.

1. Arista Networks EOS Configuration Guide: In the section on "Managing Files on a Switch," the guide specifies the syntax for file operations. It demonstrates that USB drives are referenced as usb1:, usb2:, etc., and the internal flash is flash:. The copy command examples confirm this structure.

Reference: Arista EOS 4.28.0F Configuration Guide, "File Transfers" section, subsection "Copying Files".

2. Arista Networks EOS Central - "EOS Upgrade": This official documentation article outlines the standard procedure for upgrading EOS. Step 1 of the process explicitly shows the command copy usb1:/EOS-x.y.z.swi flash: to transfer the new image from a USB stick to the switch's flash memory.

Reference: Arista EOS Central, "EOS Upgrade" article, section "Upgrading EOS".

3. Arista Networks Command Line Interface Reference Guide: The reference for the copy command details the valid source and destination file systems. It lists flash: and usb: (where n is the port number) as valid filesystem identifiers.

Reference: Arista Networks Command Line Interface Reference, copy command description.