In the RES (Resident Memory) column, the image carves out its dedicated 2GB or 4GB of RAM, ensuring it has enough room to manage routing tables.
Now run a traffic generator (e.g., pktgen from another VM) pushing 1 Gbps of VXLAN traffic. Re-run top on the leaf. You should see:
This keyword typically appears in:
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Handled by the vQFX-20.2R1-10-re-qemu.qcow2 file. This controls the Junos OS control plane, handles routing protocols (OSPF, BGP), hosts the CLI/API, and manages configurations. vqfx202r110reqemuqcow2 top
Choose 1 or 2 (or provide clarification).
The power of the vQFX is realized when it’s integrated into a full lab topology. Here’s how to deploy it on the three most popular network emulation platforms. In the RES (Resident Memory) column, the image
qemu-system-x86_64 -drive file=vqfx202r110reqemuqcow2,format=qcow2 -m 4096 -net user -net nic
The file name represents a highly specific, standardized disk image used by network engineers to emulate a Juniper Networks vQFX virtual switch under the QEMU/KVM hypervisor. In network simulation circles, the suffix "top" commonly references root-level master image configurations, baseline templates, or top-of-rack (ToR) deployment simulations in virtual network topologies. You should see: This keyword typically appears in:
The vqfx202r110reqemuqcow2 image is a great resource for network engineers seeking to master Juniper’s JunOS. By following this guide, you can deploy a fully functional virtual data center switch for experimentation, training, and testing—all at no cost. Whether you’re using EVE-NG, GNS3, or Containerlab, the steps outlined here will get you up and running and empower you to build the network labs you need.