IOS XRv is a virtual machine (VM) implementation of the 32-bit Cisco IOS XR software. Unlike traditional IOS, XR is built on a QNX microkernel, providing a modular and highly stable environment suited for large-scale routing. The "demo" tag in this filename indicates it is a trial or evaluation version, often used for:
: Perhaps the most popular tool for this specific file. You would place this image in a folder named iosxrvk9-6.1.3 inside the /opt/unetlab/addons/qemu/ directory. iosxrvk9demo613qcow2
: Denotes the "K9" crypto payload, meaning the image includes support for strong encryption (like SSH or IPsec). IOS XRv is a virtual machine (VM) implementation
The 6.1.3 release of IOS XRv is a widely used stable demo image for lab environments. Based on GNS3 community documentation , the file has the following characteristics: Specification iosxrv-k9-demo-6.1.3.qcow2 File Size MD5 Hash 1693b5d22a398587dd0fed2877d8dfac Recommended RAM 3072 MB (3 GB) Hypervisor Using the Image in Lab Environments You would place this image in a folder named iosxrvk9-6
: This denotes a demonstration or trial version. In the Cisco world, this usually means the image is free to download for lab purposes but has throughput throttling (typically limited to ~250 Kbps) or requires a license for production-level performance. 6.1.3 : The specific software release version.