The Juniper vMX is a virtualized version of the powerful MX Series router, which can be deployed in x86 server environments. It consists of two virtual machines that work in tandem:

I’m unable to directly download files or access specific external databases, software repositories, or version releases like vmxvcp-17.1r1.8-domestic-vcp . That appears to be a specific internal or versioned filename—potentially related to a proprietary, academic, or regulated software component.

Inside the folders you just created, the image files must be renamed to specific names that EVE-NG expects ( virtioa.qcow2 , virtiob.qcow2 , etc.).