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Is there an IP address range dedicated to example in documentations ? (Like for DNS)

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You mean like RFC 5737?

The blocks are: (TEST-NET-1), (TEST-NET-2), and (TEST-NET-3)

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Yes ! Thank you ! – user56295 Oct 6 '10 at 15:05

No, just use any of the RFC 1918 Addresses and you'll be fine. The other optino i've seen in documentation is the form: and

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I am not aware of an IP address equivalent to "foo" and "bar", but I could recommend using the 10-net range since it is not routable and reserved for internal networks. Since you can use the entire 10.x.x.x set, it would prove perfect for just about all scenarios.

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