Activer serveur TFTP

  sudo launchctl load -w /System/Library/LaunchDaemons/tftp.plist

Sur le routeur

  en
    configure terminal
      interface f0/0
        ip address 10.0.0.1
        no shut
        exit
      exit
    copy tftp flash
      <ip>
      <file>
      <file>
      [confirm erase]