Like its physical counterpart, IOS XR does not apply network adjustments immediately. It uses a non-volatile, target configuration layout that separates the creation of commands from activation:
While cutting-edge SR features might be limited compared to newer versions, basic Segment Routing is functional.
router isis 1 net 49.0001.1921.6800.1001.00 segment-routing mpls srgb 16000 17000 interface GigabitEthernet0/0/0/0 address-family ipv4 unicast metric 10 ! !
Despite being a "demo" image, it supports most BGP, IGP, and MPLS features required for CCIE Service Provider studies. iosxrvk9demo613qcow2
: Erases the uncommitted staging configuration pool safely. Known Limitations of the Demo Image
. This image is a primary tool for network engineers to simulate Cisco’s carrier-grade IOS XR operating system in virtual environments like without requiring physical hardware. Technical Profile File Format: (QEMU Copy-On-Write), optimized for KVM-based hypervisors. 6.1.3 (Classic IOS XRv). Image Size: Approximately Verification (MD5): 1693b5d22a398587dd0fed2877d8dfac Core Use Cases Cisco IOS XRv - GNS3
Since includes K9 encryption, it can run SSH, IPsec, and secure management protocols. However, because it is a demo image, some best practices are relaxed by default: Like its physical counterpart, IOS XR does not
The Cisco IOS XRv 9000 image is widely supported by popular network emulation platforms.
The string iosxrvk9demo613qcow2 appears to be a combining valid elements ( iosxrv , k9 , qcow2 ) with ambiguous or custom elements ( demo , 613 ). It does not match any official Cisco naming scheme.
Unlike production images, this "demo" version is optimized for lab scenarios. While it allows full control plane configuration (routing protocols, MPLS, etc.), it typically has limitations on data plane throughput and feature support compared to full production XRv images. Known Limitations of the Demo Image
Router> enable Router# show version
Create a new image folder: mkdir -p /opt/unetlab/addons/qemu/xrv-6.1.3/