Because this is a Junos image, the primary way to interact with it is via a serial console. In GNS3 or EVE-NG, ensure your "Console Type" is set to telnet .
While a split architecture mirrors a physical MX router chassis perfectly, it is resource-intensive. A modern dual-node setup easily requires 4 to 8 vCPUs and up to 8GB–16GB of RAM just to spin up a single router. Jinstall-vmx-14.1r4.8-domestic.img