Nxosv9k-7.0.3.i7.4.qcow2 -
# For EVE-NG Community cd /opt/unetlab/addons/qemu/ mkdir nxosv9k-7.0.3.i7.4 cd nxosv9k-7.0.3.i7.4 # Rename the image to the required format mv /path/to/downloaded/nxosv9k-7.0.3.i7.4.qcow2 virtioa.qcow2 EVE-NG requires proper ownership:
| Area | Limitation | | :--- | :--- | | | Software-only switching. Max ~500 Mbps per vCPU. | | Port Count | Only 8 virtual Ethernet interfaces (Eth1/1 to Eth1/8). | | MACsec | Virtual MACsec is supported but consumes high CPU. | | FEX | No Virtual FEX support (physical FEX pinning required). | | Warm Reboot | reload works; reload location does not. | | Memory Leak | In some long-running labs (>30 days), the bgp process may leak memory. Schedule weekly reboots. | | POAP | Zero-touch provisioning is disabled by default; you must manually configure mgmt0. | Critical Bug: vpc domain vs vPC If you use vPC (virtual Port Channel), avoid version 7.0.3.I7.4 with feature vpc on more than two v9ks. Use 7.0.3.I7.6 or later for multi-chassis vPC. This image is best for standalone or VXLAN EVPN labs, not classic vPC. 6. Upgrading from 7.0.3.I7.4 to a Newer Version If you need VXLAN EVPN Multisite or MPLS Segment Routing, you will eventually upgrade. The process is straightforward because the .qcow2 is just a disk. Method A: In-Place Upgrade (via CLI) Copy the new .bin file (e.g., nxos.9.3.10.bin ) to bootflash: nxosv9k-7.0.3.i7.4.qcow2
Below, we break down every component of this filename, its technical specifications, deployment best practices, and common troubleshooting pitfalls. Before deploying the image, you must understand the nomenclature. Cisco follows a strict pattern for virtual NX-OS images. | | MACsec | Virtual MACsec is supported
This file is more than just a random string of characters and extensions. It is a fully functional, virtualized instance of Cisco’s Data Center Network Operating System (NOS). Whether you are preparing for the CCIE Data Center lab, validating a VXLAN EVPN fabric, or testing automation scripts, understanding what this file is, how to use it, and its internal versioning is crucial. | | Memory Leak | In some long-running
| Component | Meaning | Specifics of this version | | :--- | :--- | :--- | | | Product Family | Nexus 9000v (Virtual Switch for KVM/EVE-NG/VDC) | | 7.0.3 | Major Release Train | Long-lived 7.0(x) series; stable for DC features | | I7.4 | Maintenance Version | Gold Star (I7) build, specific patch level .4 | | .qcow2 | Disk Format | QEMU Copy-On-Write v2 (native for KVM/libvirt) | The "I7.4" Significance The I7.4 portion indicates a Gold Star build. In Cisco terminology, an "I" suffix typically denotes a rebuild or a specific patch integrated into the base software. Version 7.0.3.I7.4 is historically significant because it represented a mature, stable point in the NX-OS 7.x lifecycle—just before the massive architectural shift to the 9.x/10.x releases.
