EVE-NG will fail to launch the node if file permissions are incorrect. Run the wrapper script to reset system-wide permissions: /opt/unetlab/wrappers/unl_wrapper -a fixpermissions Use code with caution. Step 4: Add the Node to a Topology Open the EVE-NG Web UI. Create a new lab or open an existing one. Right-click, select , and choose Cisco NX-OSv 9K . Set the template version to 9.3.9 . Adjust CPU to 4 and RAM to 8192 MB . Set the console type to telnet . Save and start the node. Deploying on Native KVM / QEMU
Create the target directory using the exact prefix required for Cisco Nexus: mkdir -p /opt/unetlab/addons/qemu/nexus9300v-9.3.9/ Use code with caution.
If you are using EVE-NG, the image must follow a strict naming convention to be recognized. nexus9300v.9.3.9.qcow2
How you deploy the qcow2 file depends on your hypervisor.
The nexus9300v.9.3.9.qcow2 file is a QEMU Copy-On-Write (QCOW) disk image designed for Linux Kernel-based Virtual Machine (KVM) hypervisors. This file contains the complete operating system and architecture definitions required to emulate a Cisco Nexus 9300 series fixed-configuration switch. Key Capabilities of Release 9.3.9 EVE-NG will fail to launch the node if
, this specific version (9.3.9) is a staple for those building high-fidelity data center labs, testing automation scripts, or preparing for Cisco certifications like the CCNP or CCIE Data Center. What is the Nexus 9300v?
The "Nexus9300v" component of the filename refers to the virtualized version of Cisco’s Nexus 9300 fixed-configuration switches. Unlike its physical counterparts, the 9300v is a software image designed to run as a Virtual Machine (VM) on generic x86 hardware or within cloud environments. This virtualization offers network engineers and DevOps practitioners a sandbox environment that mirrors the behavior of production hardware with high fidelity. Create a new lab or open an existing one
For bare-metal Linux servers or automated CI/CD pipelines, launch the image directly via the CLI:
: Software-based forwarding caps data plane traffic to low bandwidth speeds, making it unsuitable for production environments.
Verify that QEMU settings use at least , 8192MB RAM , and the network adapters are set to e1000 or virtio-net-pci . 5. First Boot and Initial Configuration
Enable KSM for better performance on systems with 32GB RAM or less: echo 1 > /sys/kernel/mm/ksm/run .