Install Junos with USB
You discover that your Junos EX or SRX device does not complete normal boot up. The image seems to be corrupted for some reason, such as a continuous power failure. If this occurs, don’t worry, you can get it back up within few minutes using the USB port. Step 1. Get a USB flash drive. Copy the Junos image to the USB drive (without creating folders). Use FAT file format if the USB size is less than 2 GB. Use FAT32 if the USB size is greater than or equal to 4 GB. The example below uses the file image junos-srxsme-10.4R1.9-domestic .tgz. Step 2. Insert the flash into an EX/SRX USB port. Step 3. Reboot the device. When Junos boots up, you will see the message : Press Space to abort autoboot Do nothing. A little while later, you will see: Hit [Enter] to boot immediately, or space bar for command prompt. Press the space bar. You will be at loader mode; the prompt should be loader>. If the prompt is > , type >boot to make it loader>. Step 4. Now type the following command: lo...