Iosxrv-k9-demo-6.1.3.qcow2 ((better)) -

This is a specific file name for a Cisco IOS XRv (Virtual Router) K9 demo image, version 6.1.3, in qcow2 format (used with KVM/QEMU).

Since you asked to "come up with a feature" — I assume you want to invent or suggest a new feature for this platform (or for a hypothetical demo image like this). If you meant something else (e.g., extract existing features, enable a feature), let me know.

Here is a plausible, useful new feature proposal for iosxrv-k9-demo-6.1.3.qcow2:

✅ Why this fits the -demo- image

• Real hardware/VM routers don’t auto-learn topology — but a demo image can safely cheat for faster prototyping.
• Helps new Cisco engineers understand virtual network layout instantly.
• Zero config required — matches “demo” expectation.

Would you like me to:

• Show how to enable an existing feature in that image (e.g., MPLS, segment routing)?
• Extract all features already present in 6.1.3?
• Propose a different feature (security, telemetry, automation)?

iosxrv-k9-demo-6.1.3.qcow2 a virtual disk image for Cisco IOS XRv , a virtualized version of Cisco's high-end IOS-XR software

. It is typically used by network engineers and students to simulate network topologies for testing or learning purposes. Usage and Installation This specific image is designed to run in a Iosxrv-k9-demo-6.1.3.qcow2

hypervisor environment and is widely used with network emulation platforms: : Users often create a specific directory (e.g., /opt/unetlab/addons/qemu/xrv-k9-6.1.3 ) and rename the file to to make it compatible with the GNS3 registry

includes this file in its appliance configuration for easy import into the GNS3 network simulator : It can also be packaged as a "box" for

to spin up quick, single-node virtual instances for development. Key Specifications : 6.1.3 (Demo version).

(QEMU Copy-On-Write), which is a standard disk image format for virtual machines. MD5 Checksum 1693b5d22a398587dd0fed2877d8dfac Typical Filesize : Approximately 408 MB. step-by-step commands

to set this up in a particular lab environment like EVE-NG or GNS3? This is a specific file name for a

gns3-registry/appliances/cisco-iosxrv.gns3a at master - GitHub

e. ARM Hosts

This image is compiled for x86_64. It will not run on Apple Silicon (M1/M2/M3) without full x86 emulation (very slow).

3. System Requirements for Running iosxrv-k9-demo-6.1.3.qcow2

To run this image smoothly, your virtualization platform must meet certain specifications:

1. Control Plane Only

The "demo" image has no data plane. Every packet that enters a physical/virtual interface is punted to the CPU.

• Implication: You cannot run iPerf or actual throughput tests. Ping and traceroute work because they generate slow path control plane traffic. A traffic generator sending 1 Mbps will crash the virtual router.
• Workaround: Use pings and traceroutes for reachability; use show commands for verification.

🎯 Goal

Simplify network emulation and testing by allowing the IOS XRv demo image to automatically discover directly connected virtual neighbors (other demo nodes or Linux bridges/OVS) and generate a running inventory + basic L3 adjacency map — without manual configuration. ✅ Why this fits the -demo- image

Purpose and use cases

• Lab and learning: practice IOS XR configuration, routing protocols (BGP, OSPF, IS-IS), MPLS, segment routing, and high-availability features without physical hardware.
• Development and testing: validate automation, telemetry, YANG models, NETCONF/RESTCONF integrations, and configuration management tools.
• Demos and proof-of-concepts: showcase IOS XR capabilities to stakeholders.

Part 6: Common Pitfalls and Troubleshooting

Even with the right image, things go wrong. Here are the fixes for the most frequent issues.

Pitfall 1: System gets stuck at Loading kernel modules...

• Cause: Insufficient RAM.
• Fix: Allocate exactly 3GB to 4GB. Giving it 2GB causes a hang; giving it 8GB is wasteful and may confuse the demo's memory detection.

Pitfall 2: Interfaces are always down/up (no carrier) even when connected.

• Cause: The demo image requires the QEMU virtio-net-pci driver and a specific vhost setting.
• Fix in GNS3: In the QEMU configuration, ensure "Use as a legacy network device" is unchecked. Enable "VirtIO" net driver.

Pitfall 3: Losing configuration after reboot.

• Cause: The demo image may not commit configuration to disk on a dirty shutdown.
• Fix: Always run commit replace followed by copy running-config harddisk:/demo.cfg. Then set boot system harddisk:/demo.cfg.