If you prioritize I/O performance over snapshot features, convert the image to raw:
qemu-img convert -f qcow2 -O raw vqfx202-r1.1.0.qcow2 vqfx202.raw
Then update your VM definition to point to the .raw file. You will see lower wa values in top.
The keyword vqfx202r110reqemuqcow2 top encapsulates a daily reality for network virtualization engineers: deploying a complex virtual switch requires equal parts networking knowledge and system administration acumen. vqfx202r110reqemuqcow2 top
Key takeaways:
Next time you type vqfx202r110reqemuqcow2 top into your terminal, you will know exactly what to look for – and how to fix what you find. If you prioritize I/O performance over snapshot features,
Symptom: top shows total memory ~99% used, and the junos-main process disappears.
Cause: The VM has insufficient RAM for the vQFX control plane plus forwarding tables.
Fix: Increase VM memory to 6 or 8 GB. Live resize is possible:
virsh setmem vqfx202-lab 8G --config --live
Cpu(s): 15.0%us, 3.5%sy, 0.0%ni, 81.0%id, 0.5%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 8189432k total, 3892132k used, 4297300k free
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: Then update your VM definition to point to the
If you see %st suddenly appear, it means your host CPU is saturated – scale down or dedicate cores.
The Juniper vQFX is a virtual switch that emulates the behavior of a physical QFX Series switch. It is widely used for:
When running top on your vQFX 20.2R1.10 QCOW2 image, you may encounter: