IOS XR

"IOX" redirects here. For the remote sensing satellite package, see Ionospheric Occultation Experiment.
Line card running IOS XR.

IOS XR is a train of Cisco Systems' widely deployed Internetworking Operating System (IOS), used on their high-end carrier-grade routers such as the CRS series, 12000 series, and ASR9000 series.

Architecture

According to Cisco's product literature, IOS XR shares very little infrastructure with the other IOS trains, and is instead built upon a "preemptive, memory protected, multitasking, microkernel-based operating system".[1] The microkernel is provided by QNX.[2]

IOS XR aims to provide the following advantages over the earlier IOS trains:

History

IOS XR was announced along with the CRS-1 in May 2004.[3] The first generally available version was 2.0. The most recent release is version 5.3[4] which was released on 20 January 2015.

Other significant releases include the following.

References

  1. Cisco IOS XR product literature
  2. QNX press release confirming use of their microkernel in IOS XR
  3. Cisco press release announcing CRS-1 and IOS XR
  4. Cisco's release notes, for the various IOS XR versions
  5. Release notes for XR 5.0

External links

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