Cat4500es8-universalk9.spa.03.11.05.e.152-7.e5.bin

The .spa suffix means this image is packaged for SPA (Structured Package Architecture), the modern Cisco packaging format that includes digital signatures, metadata, and often multiple sub-packages (e.g., runtime, firmware, bootloader). This improves installation reliability and rollback capabilities.

Do not attempt to flash a non-SPA image on a supervisor that expects SPA format, or vice versa. cat4500es8-universalk9.spa.03.11.05.e.152-7.e5.bin

write memory reload

Despite security patches, some configurations restore SMI on reload. Manually disable it after upgrade: Despite security patches, some configurations restore SMI on

Switch(config)# no vstack
Switch(config)# no macro auto global-processing

✅ Yes, if:

❌ No, if: