__exclusive__ — Vqfx202r110reqemuqcow2 Exclusive

Because the RE image handles intense database operations for Junos configuration, routing tables, and management logs, QEMU applies strict file-locking mechanisms to prevent data corruption. Why the "Exclusive" Lock Error Occurs

A Linux host system (Ubuntu 22.04 LTS or later recommended) with KVM hardware acceleration enabled. qemu-kvm and qemu-utils packages installed. vqfx202r110reqemuqcow2 exclusive

: This is the role of the vqfx-20.2R1.10-re-qemu.qcow2 image. It houses the primary Junos OS instance, runs all Layer 2 and Layer 3 protocols (OSPF, BGP, EVPN, etc.), maintains routing tables, and provides the management interface (CLI, SNMP, NETCONF). It is the "brains" of the switch. Because the RE image handles intense database operations

| Component | Meaning | |-----------|---------| | vqfx202 | Juniper vQFX model (e.g., vQFX 10k series, often used in EVE-NG or PnetLab for switching) | | r1 | Possibly revision 1 of the image or node identifier | | 10req | 10 requests? Or part of naming — likely indicates resource requirement (e.g., 10GB RAM or 10 requests?) More probably a lab filename convention | | emu | Emulation / QEMU | | qcow2 | QEMU Copy-On-Write version 2 disk image format | | exclusive | Access mode: the QEMU process has read/write access to the QCOW2 file; no other process can open it simultaneously | : This is the role of the vqfx-20

Powered by our target image, the RE runs standard Junos OS. It interfaces with the engineer via SSH, NETCONF, or console, building the Routing Information Base (RIB) and downloading the Forwarding Information Base (FIB) to the VFE.

virt-install \ --name vqfx-re \ --ram 4096 \ --vcpus 4 \ --disk path=/path/to/vqfx-20.2R1.10-re-qemu.qcow2,format=qcow2 \ --network bridge=br0,model=virtio \ --graphics none \ --console pty,target_type=serial