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Iosxrv-k9-demo-6.1.3.qcow2 May 2026

Deep Dive into iosxrv-k9-demo-6.1.3.qcow2: The Cisco IOS XRv Demo Image for Network Engineers

Switch to XR environment

sysadmin-vm:0_RP0# run XRv-1# admin

b. Feature Depth vs. Resource Footprint

Later versions (7.x) require massive RAM (16-32GB per node) and multiple vCPUs. Version 6.1.3 can operate with 4GB-6GB of RAM and 2 vCPUs, making it ideal for modest EVE-NG or GNS3 setups.

Minimum resource requirements (recommended)

  • vCPU: 2–4 (minimum 2; 4 recommended for reasonable performance)
  • RAM: 4–8 GB (4 GB minimum; 8 GB for larger topologies or features)
  • Disk: 8–16 GB free disk for the image and working files
  • Virtualization: KVM/QEMU recommended; may work with VMware after conversion
  • Network: 1–4 virtual NICs (tap/virtio recommended) depending on topology

Part 7: Security and Legal Considerations

The "k9" in the name indicates strong cryptography. Depending on your jurisdiction (e.g., export restrictions under EAR in the USA), distributing this specific binary may be prohibited. Iosxrv-k9-demo-6.1.3.qcow2

  • Legal Use: You are permitted to download this image from Cisco.com if you have a valid support contract for a physical ASR9000 or NCS device.
  • Illegal Distribution: Do not upload iosxrv-k9-demo-6.1.3.qcow2 to public torrents, cloud drives, or file sharing sites. Unauthorized distribution violates Cisco's software licensing and can lead to legal action.
  • Safe Practice: Use it within a disconnected lab environment. When posting configs online, scrub the k9 cryptographic keys from your show running-config output.

Deep Dive into IOS XRv: Analyzing "Iosxrv-k9-demo-6.1.3.qcow2"

In the world of network engineering, the shift from hardware-centric labs to software-defined environments was largely fueled by the availability of virtual routing platforms. For many engineers cutting their teeth on Service Provider architectures, the file Iosxrv-k9-demo-6.1.3.qcow2 represents a specific, pivotal era in Cisco IOS XR virtualization.

Whether you found this file in an older lab repository or are trying to understand the evolution of Cisco virtualization, this post covers everything you need to know about this specific image, its architecture, and how it fits into modern network simulation. Deep Dive into iosxrv-k9-demo-6

Method 2: Raw QEMU/ KVM (Linux CLI)

For a single router lab:

# Create a bridge interface for connectivity
sudo brctl addbr virbr0
sudo ip link set virbr0 up

Typical Lab Topology with 5x demo nodes:


[Client PC] --- [PE1 - XRv 6.1.3] --- [P1 - XRv 6.1.3] --- [PE2 - XRv 6.1.3] --- [Client PC2]
                 |                    |                     |
                 [ASBR1] ------------ [ASBR2] (E-BGP over IPv4)



You can easily spin this up in EVE-NG. Configure ISIS Level-2 only on core links, enable MPLS globally, and establish LDP or SR. vCPU: 2–4 (minimum 2; 4 recommended for reasonable


5. Key Features and Protocols in Version 6.1.3


Why choose 6.1.3 over older or newer versions? Here are standout capabilities present in this build:


| Protocol/Category | Support Level | Use Case |
|-------------------|---------------|-----------|
| BGP | Full (4-byte AS, Add-Path, Link-State) | ISP peering, MPLS VPN |
| OSPFv2/v3 | Full with TE extensions | Traffic Engineering |
| IS-IS | Full, multi-topology | Large SP backbone |
| MPLS | LDP, RSVP-TE, Segment Routing (SR-MPLS) | Core networking |
| EVPN | Basic (Type 2, Type 5 routes) | Data center interconnect |
| Netconf/YANG | Native (SSH subsystem) | Automation with Python/Napalm |
| Telemetry | Model-driven (gRPC, UDP) | Streaming analytics |
| ACLs | Standard/Extended with object groups | Security filtering |


A critical note: This is an XRv (Route Processor only) image, not XRv 9000. It does NOT support line card emulation or high-scale forwarding. Throughput is limited to ~10 Gbps in software.