G4 Flashnet Utility Download -

Get-FileHash g4_flashnet_v4.2.1.zip -Algorithm SHA256

Operational Guidance for the G4 FlashNet Utility: Download, Verification, and Application g4 flashnet utility download

Force flash in recovery mode:

./g4_flashnet --ping --target 192.168.1.100 Get-FileHash g4_flashnet_v4