You'll need the disk image (ISO file) so that you can create a bootable Vyatta NOS LiveCD disk.

1. Go to the Ciena Portal at https://my.ciena.com/CienaPortal/s/login/ and sign in.
2. Select Software, and then Browse Downloads.
3. At the Select Product drop-down, select Vyatta.
4. From the list of Vyatta NOS downloadable files, locate the disk image file (ISO). Click on the file to proceed with the download.
   You are prompted with compliance and license agreement statements.
5. Review the statements and, if you agree, accept them to proceed. Otherwise you cannot download the file.
6. When you are prompted, choose where you wish to save the file and download it.