When compiled into a virtual disk format, the image name breaks down into specific technical identifiers:
: Studying for the NRS I (Network Routing Specialist I), NRS II, or SRA (Service Routing Architect) lab exams.
The default login credentials are:
: Represents the "Time-division Multiplexing Operating System" tailored for the Service Router (SR) product pipeline. Timos-sr-13.0.r4-vm.qcow2
Before deploying a complex Segment Routing policy, run it here. The vm.qcow2 image behaves exactly like a 7750 SR-12 line card—because the data plane is the same binary, just virtualized.
This configures serial console, disables default configurations, and sets the real-time clock to UTC.
: Graphical Network Simulator-3, a widely used open-source network emulator. Proxmox VE : An open-source server management platform. Minimum System Resource Requirements When compiled into a virtual disk format, the
If you want to dive deeper into configuring this specific Nokia image, tell me:
When working with the Timos-sr-13.0.r4-vm.qcow2 file, keep the following best practices in mind:
Version 13.0 introduces stable carrier-grade routing protocols into a virtual lab environment: The vm
Specifies the software release version. Version 13.0.r4 is a stable, maintenance release within the SR OS 13 major release train. While newer versions exist (such as SR OS 20.x through 24.x+), Release 13 remains a benchmark version for legacy certifications, fundamental architecture studies, and environments requiring lightweight resource consumption.
2 GB minimum (4 GB recommended if testing heavy BGP routing tables or complex telemetry).
In this post, we are taking a specific look under the hood of a popular image often circulated for lab environments: .