Arista currently posts separate EOS images for different CPU architectures: i686 (EOS.swi), x86_64 (EOS64.swi), and aarch64-based (EOSarm.swi, starting with EOS-4.35.0F). The universal SWI (EOSuni.swi) is a single file containing support for all CPU architectures, meant to simplify image management and provisioning. The universal SWI will be posted in addition to the existing architecture-specific SWIs and is not meant to fully replace them.

TOI EOS 4.34.2F Universal SWI