: Minimum 2 GB (4 GB recommended for full routing tables or advanced features). vCPU : 1 to 2 cores.
: The native Linux kernel-based virtual machine hypervisor.
To understand this file, we must break down its naming convention, which reveals everything about its underlying architecture, version, and deployment format:
QCOW2 (QEMU Copy-On-Write), optimized for KVM virtualization. File Size: Approximately 368.5 MB. MD5 Checksum: d7a3609e506acdcb55f6db5328dba8ed . Resource Requirements
(QEMU Copy-On-Write), a space-efficient virtual disk format that only grows as data is added. Virtual Machine Requirements To run this image effectively in a simulator like , the following resources are typically allocated: license not matching TiMOS-B-13.0.R4 - Alcatel Unleashed Timos-sr-13.0.r4-vm.qcow2
Mastering the Nokia/Alcatel-Lucent 7750 SR Simulator: A Deep Dive into Timos-sr-13.0.r4-vm.qcow2
You may need to set the network interface type to e1000 or virtio-net-pci for the virtual interfaces to be recognized correctly.
virt-install --name nokia-sr1 --ram 8192 --vcpus 4 --disk path=./timos-sr-13.0.r4-vm.qcow2,format=qcow2 --network network=default,model=virtio --network network=default,model=virtio --graphics none --console pty,target_type=serial
qemu-system-x86_64 \ -m 4096 \ -smp 2 \ -drive file=Timos-sr-13.0.r4-vm.qcow2,if=virtio \ -netdev user,id=net0,hostfwd=tcp::2222-:22 \ -device virtio-net-pci,netdev=net0 \ -nographic : Minimum 2 GB (4 GB recommended for
Running Timos-sr-13.0.r4-vm.qcow2 requires proper resource allocation. Below are the typical minimum and recommended specs for this specific version.
Because it is a .qcow2 file, engineers utilize . The base file remains read-only (the pristine OS). If an engineer wants to test a dangerous configuration, they create a "overlay" or "snapshot" child of this file. If the configuration crashes the virtual router, they simply delete the overlay and revert to the original Timos-sr-13.0.r4-vm.qcow2 in seconds—a process that would take hours on physical hardware.
Timos-sr-13.0.r4-vm.qcow2 is more than a file; it is a philosophy. It encapsulates the shift from "bare metal" to "anything-as-a-service." By taking the complex, stateful logic of a carrier router and sealing it into a portable, efficient, and virtualizable disk image, Nokia and the open-source community have democratized access to high-end networking. For the network engineer of 2025, this single file is a sandbox, a classroom, and a production tool—all contained within 2 gigabytes of digital storage. It proves that in the modern era, the most powerful routers are no longer measured in rack units, but in megabytes.
Once the VM boots, you can access the console by telneting to localhost:3366 Critical Troubleshooting Tips The "60-Minute Reboot" To understand this file, we must break down
Once the VM is booted, you must apply a valid license. The process involves:
: Indicates the software is tailored for the Service Router (SR) series, predominantly emulating the Nokia 7750 SR architecture.
: Without a valid lic.txt file, the system may reboot automatically every 60 minutes . license not matching TiMOS-B-13.0.R4 - Alcatel Unleashed
: 13.0.r4 denotes major release 13, minor revision 0, maintenance release 4. While newer versions of SR-OS exist today, version 13 remains a foundational platform used in many legacy corporate environments, training programs, and certification tracks like the Nokia SRC (Service Routing Certification). Architectural Use Cases