Cisco IOS XR
| Developer | Cisco Systems |
|---|---|
| OS family | Unix-like |
| Working state | Current |
| Source model | Closed source |
| Latest release | 24.4.2 / March 21, 2025 |
| Platforms | NCS 5x0, NCS 5x00, 8000, ASR 9000 and XRv 9000 Series Routers |
| Userland | Linux |
| Official website | Cisco 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.