Applying a License to a Juniper EX Series Switch

• Get the license file named <SerialNumber>.txt, e.g. TW1234567890.txt
• Open the license file in a text editor, the content will look something like this:

  JUNOS123456 abcdef abcdef abcdef abcdef abcdef abcdef
              ghijkl ghijkl ghijkl ghijkl ghijkl ghijkl
              uvwxyz uvwxyz uvwxyz uvwxyz uvwxyz ra

• Change it so that the whole key is in one single line:

  JUNOS123456 abcdef abcdef abcdef abcdef abcdef abcdef ghijkl ghijkl ghijkl ghijkl ghijkl ghijkl uvwxyz uvwxyz uvwxyz uvwxyz uvwxyz ra

• Connect to the JunOS device's serial console
• Get into command mode (root>), i.e. type cli or exit if you're in shell or configure mode
• Type show system license to check the licenses already installed
• Type show chassis hardware and check if the chassis' serial nuber matches the license file name
• Install the new license
  • Type request system license add trerminal
  • Paste the one-line license key (see above) from the license file into the terminal
  • Hit [ENTER] followed by [Ctrl-D]
  • In case of success, you should see the message add license complete (0 errors)
• Type show system license to check the new license has been applied