Pnetlab 5.3.11 Jun 2026

Build a 20-node topology with:

This update focuses on improving the user interface and resolving longstanding issues with consoles and device templates . What’s New in PNETLab 5.3.11? Pnetlab 5.3.11

| Aspect | Benefit | |--------|----------| | | Nodes that are idle for a configurable period are automatically powered down or placed in a lightweight “sleep” mode, freeing CPU, RAM, and storage for other labs. | | Instantaneous Scaling | When a lab’s traffic spikes (e.g., during a simulated DDoS or a large‑scale routing convergence test), Pnetlab instantly spins up additional instances of the required device types to handle the load. | | Policy‑Driven Control | Administrators can define policies per‑lab, per‑user group, or per‑device type (e.g., “always keep 2 routers online, but allow up to 5 when CPU > 70 %”). | | Cost‑Optimized Cloud Deployments | In cloud‑hosted environments (AWS, Azure, GCP), the feature ties into the provider’s auto‑scaling groups, reducing operational spend by scaling only when needed. | | Seamless Integration with Existing Workflows | The auto‑scaling engine works transparently with the classic “Start/Stop” UI, the API, and the CLI, so scripts and automation pipelines require no changes. | | Granular Monitoring & Alerts | Built‑in dashboards show real‑time scaling events, and you can hook into Prometheus or Grafana for custom alerts (e.g., “scale‑up event triggered on Lab‑A at 14:03 UTC”). | Build a 20-node topology with: This update focuses

PNETLab (Packet Network Emulator Tool Lab) is a network simulation and emulation tool designed for learning, testing, and validating network technologies and applications. It helps learners and professionals simulate real-world computer network systems through virtual environments. | | Instantaneous Scaling | When a lab’s traffic spikes (e

Ensure your images are correctly named (e.g., l2_iol-xxxx.bin for switches, l3_iol-xxxx.bin for routers) to ensure they work correctly with the GUI templates. Conclusion

This version introduced more aggressive memory ballooning. Disable it globally: System > Preferences > QEMU > Disable Memory Ballooning (Check) > Save .

Corrects issues where HTML5 capture failed when nodes were connected to internal or private clouds. RDP Stability: