Rules / simplifications:
● If one or more fields have the value 0, a shortened notation is possible.
The address fd00:0000:0000:ffff:02d1:7d01:0000:8f21 can also be shortened and written
as follows:
fd00::ffff:02d1:7d01:0000:8f21
To ensure uniqueness, this shortened form can only be used once within the entire address.
● Leading zeros within a field can be omitted.
The address fd00:0000:0000:ffff:02d1:7d01:0000:8f21 can also be shortened and written
as follows:
fd00::ffff:2d1:7d01:0000:8f21
● Decimal notation with periods
The last 2 fields or 4 bytes can be written in the normal decimal notation with periods.
Example: The IPv6 address fd00::ffff.125.1.0.1 is equivalent to fd00::ffff:7d01:1
Structure of the IPv6 address
The IPv6 protocol distinguishes between three types of address: Unicast, Anycast and
Multicast. The following section describes the structure of the global unicast addresses.
IPv6 prefix
Suffix
Global prefix:
n bits
Subnet ID
m bits
Interface ID
128 - n - m bits
Assigned address
range
Description of the location, also
subnet prefix or subnet
Unique assignment of the host in the net‐
work.
The ID is generated from the MAC address.
The prefix for the link local address is always fe80:0000:0000:0000. The prefix is shortened and
noted as follows: fe80::
IPv6 prefix
Specified in: RFC 4291
The IPv6 prefix represents the subnet identifier.
Prefixes and IPv6 addresses are specified in the same way as with the CIDR notation
(Classless Inter-Domain Routing) for IPv4.
Design
IPv6 address / prefix length
Example
IPv6 address: 2001:0db8:1234::1111/48
Prefix: 2001:0db8:1234::/48
Interface ID: ::1111
IP addresses
5.3 IPv6 address
SCALANCE W1780/W1740 according to IEEE 802.11ac Web Based Management
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