IOS XR


IOS XR

IOS XR is the latest train of Cisco Systems' widely deployed Internetworking Operating System (IOS), used on their high-end carrier-grade routers such as the CRS-1 and the 12000 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". [ [http://www.cisco.com/en/US/products/ps5845/prod_qandas_list.html Cisco IOS XR product literature] ] The microkernel is provided by QNX. [ [http://www.qnx.com/news/pr_1329_3.html QNX press release] confirming use of their microkernel in IOS XR]

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

* Improved high availability (largely through support for hardware redundancy and fault containment methods such as protected memory spaces for individual processes and process restartability)
* Better scalability for large hardware configurations (through a distributed software infrastructure and a two-stage forwarding architecture)
* A package based software distribution model (allowing optional features such as multicast routing and MPLS to be installed and removed while the router is in service)
* The ability to install package upgrades and patches (potentially while the router remains in service)
* A web-based GUI for system management (making use of a generic, XML management interface)

History

IOS XR was announced along with the CRS-1 in May 2004. [ [http://newsroom.cisco.com/dlls/2004/prod_052504.html?CMP=ILC-001 Cisco press release] announcing CRS-1 and IOS XR] The first generally available version was 2.0; the first version generally available for the 12000 router series was 3.2. The most recent release is version 3.7, released in June 2008. [ [http://www.cisco.com/en/US/products/ps5845/prod_release_notes_list.html Cisco's release notes] for the various IOS XR versions]

References

External links

* [http://www.cisco.com/en/US/products/ps5763/products_visual_documentation.html Cisco multimedia documentation] covering IOS XR and its supported systems
* [http://www.qnxzone.com/?q=node/view/131 Cisco reveals it uses QNX] to power its IOS XR software
* [http://www.cisco.com/en/US/products/products_security_advisories_listing.html Cisco Security Advisories] - complete history
* [http://www.cisco.com/web/Cisco_IOS_XR_Software/index.html Cisco IOS XR Software General Information]
* [http://www.uknof.org.uk/uknof11/Nisbet+Wilson-HEAnet.pdf HEAnet's New Network and Working with IOS-XR]


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • IOS XR — продолжатель ряда широко известных Cisco IOS, используемых в её high end маршрутизаторах, ориентированных на операторов связи, подобным сериям CRS 1, 12000 и ASR9000. Содержание 1 Архитектура 2 История 3 Ссылки …   Википедия

  • IOS — steht für: I/O Stream, eine Klassenhierarchie der C++ Standardbibliothek, die hauptsächlich den Datenstrom verwaltet Impulsoszillometrie, ein Messverfahren der Lungenfunktionsdiagnostik Informations und Objektsicherheit IOS, gehört zum… …   Deutsch Wikipedia

  • IOS — or IOS may refer to:*Ios Island, an island in the Cyclades group in the Aegean Sea *IOS Press, a Dutch publisher of scientific and medical research titles *Internet operating system, software containing sets of procedures and functions providing… …   Wikipedia

  • IOS — IOS: Cisco IOS  операционная система маршрутизаторов фирмы Cisco Apple iOS  операционная система мобильных устройств фирмы Apple Internet OS  вычислительная среда для облачных вычислений См. также IBM i (ранее называвшаяся «OS/400» …   Википедия

  • Ios — Ios,   Insel der südlichen Kykladen, Griechenland, 108 km2, 1 400 Einwohner; bergig und wasserarm; die Bewohner leben heute vorwiegend vom Tourismus. Im 5. Jahrhundert v. Chr. war Ios Mitglied des 1. Attischen Seebundes. Aus byzantinischem Besitz …   Universal-Lexikon

  • IOs — UK US noun [plural] FINANCE ► INTEREST ONLY STRIPS(Cf. ↑interest only strips): »Making money on IOs was possible even though interest rates fell last year …   Financial and business terms

  • IOS — ins. in mari Myrtoo. Plin. l. 4. c. 12. una Sporadum, Homeri sepulchro veneranda, et matris Homeri natalibus, dicta putatur ἀπὸ Ι᾿ώνων οἰκησάντων, ut et a Lydis Lydia, et Phoenice, a Phoenicibus. Quippe etiam his nominibus insignitur, apud Steph …   Hofmann J. Lexicon universale

  • Ios (C++) — ios is part of the C++ standard library. It defines several types and functions basic to the operation of iostreams. This header is typically included automatically by other iostream headers. Programmers rarely include it directly.Members… …   Wikipedia

  • Ios — (Nios), eine der Kykladen im Ägäischen Meer, südlich von Naxos,17 km lang, bis 8 km breit, 120 qkm groß und 735 m hoch, aus Granit und kristallinischen Schiefern aufgebaut, bringt Öl, Baumwolle, Wein und Getreide hervor und betreibt auch… …   Meyers Großes Konversations-Lexikon

  • Ios — Ios, jetzt Nió(s), griech. Zykladeninsel, bis 734 m hoch, 120 qkm, (1896) 2171 E …   Kleines Konversations-Lexikon


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.