One thought on “Which address block identifies all link-local address”
RFC 1884 reserved the block FEC0::/10 for site local address but this has since been deprecated and replaced with FC00::/7 for used in private networks as defined in RFC 4193.
FC00::/7 is further divided into two /8 subnets:
FC00::/8 – the usage of this block has not been clearly defined.
FD00::/8 – the routing prefix is formed by appending 40-bit of randomly-generated bit string in the format of FDxx:xxxx:xxxx::/48 leaving the network administrator with 16 bit for subnetting and 64 bit for network identifier.
RFC 1884 reserved the block FEC0::/10 for site local address but this has since been deprecated and replaced with FC00::/7 for used in private networks as defined in RFC 4193.
FC00::/7 is further divided into two /8 subnets:
FC00::/8 – the usage of this block has not been clearly defined.
FD00::/8 – the routing prefix is formed by appending 40-bit of randomly-generated bit string in the format of FDxx:xxxx:xxxx::/48 leaving the network administrator with 16 bit for subnetting and 64 bit for network identifier.