IPv6 prefixes and address planning
Read IPv6 address types, count and number subnets inside a prefix, and build a clean /64-per-LAN plan.
- Level
- Intermediate
- Length
- About 50 minutes
- Contents
- 3 lessons · 1 video · final exam
- Status
- Published · updated 1 Oct 2026
Skills you'll practise
- Identify global unicast, link-local, unique local and multicast addresses
- Calculate how many /64 subnets fit in a delegated prefix and name the Nth subnet
- Explain why LAN segments use /64 and why ICMPv6 must not be blocked wholesale
- Review an IPv6 address plan and find entries that break it
Course outline
- 1.Planning IPv6 prefixesVideo · 2 min
- 2.Address types and notationLesson · 20 min
- 3.Planning prefixesLesson · 20 min
- 4.How hosts get IPv6 addresses: SLAAC, DHCPv6 and privacyLesson · 20 min
- 5.IPv6 prefixes and address planning: knowledge checkKnowledge check · 20 questions
- 6.Final exam8 questions · passing it completes the course, so people who already know the material can test out
Sources it draws on
The lessons and questions are written from these references, so learners can go back to the original.
- RFC 4291: IP Version 6 Addressing Architecture
- RFC 5952: A Recommendation for IPv6 Address Text Representation
- RFC 4193: Unique Local IPv6 Unicast Addresses
- RFC 4861: Neighbor Discovery for IP version 6
- RFC 4890: Recommendations for Filtering ICMPv6 Messages in Firewalls
- RFC 3849: IPv6 Address Prefix Reserved for Documentation
See it with your own jobs and topics
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