Routing Theory
IPv6 Addressing
IPv6 Addressing
  • Introduction
  • Addresses
  • Addressing Model
    • GUA
    • Link Local
    • Site Local
    • ULA
    • Anycast
    • Multicast
      • Solicited Node Multicast Address
  • Subnetting
    • Example
  • The last 64 bits
  • Routing Protocols
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  1. Addressing Model

Link Local

PreviousGUANextSite Local

Last updated 1 year ago

Link local address space is fe80::/10, the first 10 bits give fe80, so other valid addresses include fe9, fea, feb. The next 54 bits are zero. The final 64 bits are unique per LAN.

Link local addresses are only meaningful on a single link or on a single layer 2 segment, packets from these addresses will not travel through a router. They are a little bit like the 169 addresses we see with IPv4.

For example, my Linux VM has auto-configured; fe80::bd8f:cd15:9492:e987. Every IPv6-enabled interface must contain at least one loopback (::1/128) and one link-local address.