History
IOS XR was announced along with the CRS-1 in May 2004. The first generally available version was 2.0; the first version generally available for the 12000 router series was 3.2. Version 3.9 was the first generally available version for the ASR9000 series. The most recent release is 4.2 which was released on December 23rd, 2011.
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“America is the only nation in history which, miraculously, has gone directly from barbarism to degeneration without the usual interval of civilization.”
—Attributed to Georges Clemenceau (1841–1929)
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Figuring the natures of the times deceased,
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With a near aim, of the main chance of things
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—Richard M. Nixon (1913–1995)