Cisco IOS XR

Cisco IOS XR
DeveloperCisco Systems
OS familyUnix-like
Working stateCurrent
Source modelClosed source
Latest release24.4.2 / March 21, 2025 (2025-03-21)
PlatformsNCS 5x0, NCS 5x00, 8000, ASR 9000 and XRv 9000 Series Routers
UserlandLinux
Official websiteCisco IOS XR

IOS XR is a release train of Cisco Systems' widely deployed Internetwork Operating System (IOS), used on their high-end Network Convergence System (NCS) and carrier-grade routers such as the ASR 9000 series and Carrier Routing System series of routers.