To use the built-in Packet Forwarding Engine (PFE) without a second VM, users often edit the /boot/loader.conf file within the image. this image into a specific lab environment like Need EOL software image | Training and Certification
: If your company has an active support contract, you can open a support ticket to request access to EOL software images . jinstallvmx141r48domesticimg download link
Early leaked engineering copies of vMX (like 14.1R1 and 14.1R4) were compiled as unified .img files. To use the built-in Packet Forwarding Engine (PFE)