The file is a virtual disk image containing version 13.0.R4 of the Nokia (formerly Alcatel-Lucent) Service Router Operating System (SR OS) . Known as TiMOS (Terabit Interactive Model-driven Operating System), this software powers high-performance carrier-grade routers such as the 7750 SR and 7950 XRS. Purpose and Architecture
If the VM appears to be "stuck" or hangs during boot, ensure that the KVM acceleration is correctly enabled ( kvm-ok command). Additionally, confirm that the QEMU machine type ( -machine pc ) matches the hardware expectations of the TiMOS kernel.
Users have reported that starting multiple virtual routers simultaneously can cause some nodes to appear frozen or unresponsive. This is often a resource bottleneck. To mitigate this:
It is important to distinguish between two Nokia products. The Timos-sr-13.0.r4-vm.qcow2 runs , which is the classic, highly mature carrier-grade OS. It is distinct from SR Linux , a newer, modern, cloud-native NOS based on Linux. While SR OS is run as a QEMU VM, SR Linux is distributed as a free, lightweight container image ( ghcr.io/nokia/srlinux ) that is native to Docker and Containerlab. Timos-sr-13.0.r4-vm.qcow2
Without KVM support (fallback to software emulation):
Physical service routers (such as the Nokia 7750 SR or 7950 XRS) are expensive, high-throughput hardware platforms. The virtualized counterpart, often referred to as the Virtual Service Router (VSR) or simulator, serves several non-production purposes:
This corrects file permissions for the EVE-NG environment. The file is a virtual disk image containing version 13
If you want, I can produce:
After the system finishes initialization, log in using the factory default credentials: : admin Password : admin Common Troubleshooting Scenarios License Expiration Loops
Deployment steps (quick)
Network engineers use this image to build complex network topologies in GNS3 to test configuration changes before deploying them on live hardware.
Alcatel-Lucent Virtualized Simulator on GNS3 - Brezular's Blog
Running a full SR OS instance is resource-intensive. For version 13.0.R4, standard requirements include: Additionally, confirm that the QEMU machine type (
The naming convention of the image reveals key parameters about its purpose and compatibility:
: Specifies that the image is optimized out-of-the-box as a Virtual Machine guest operating system.