CalculatorsLesson 152Free preview

IPv6 ULA Generator

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Summary

The ULA IPv6 generator creates a unique local address prefix with an fc00::/7 range, generally starting with fd, for internal networks not connected to the internet. The resulting/48 prefix contains 40 random bits as Global ID, so it is unlikely to collide with other networks. ULA addresses are suitable for laboratories, home networks, or corporate internal subnets.

Key points

ULA is at fc00::/7 and common practice is to use fd00::/8
The 40 bit Global ID is randomly generated, not from the ISP.
The prefix/48 leaves 16 bits for the subnet and 64 bits for the interface ID
ULA should not be streamed on the public Internet
The local link address fe80::/10 is different from the ULA

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