# Check if file is locked by QEMU lsof | grep vqfx202r110reqemuqcow2
<disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='writeback' io='threads'/> </disk> vqfx202r110reqemuqcow2 exclusive
: It is where you apply all configurations. In simulation environments like EVE-NG or GNS3 , you connect your management terminal directly to the RE node. # Check if file is locked by QEMU
The term is the most critical modifier. Standard vQFX images are available via Juniper’s official download portal (requires a valid support contract). However, the exclusive tag typically refers to a community-curated, pre-tuned, or pre-licensed image. Why seek an exclusive release? Standard vQFX images are available via Juniper’s official
Physical QFX switches are expensive. The vQFX (especially the unique 20.2R1.10 build) replicates 95% of the CLI and control plane of the physical hardware. Candidate labs for (Data Center) rely on vQFX for EVPN/VXLAN troubleshooting.
Create a VM XML ( vqfx.xml ) with:
: The RE must be connected to the PFE image (often via the em1 interface) for the switch ports to become active.