Siemens SCALANCE W1780 Configuration Manual page 55

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
Global prefix:
n bits
Assigned address
range
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
SCALANCE W1780/W1740 according to IEEE 802.11ac Web Based Management
Configuration Manual, 11/2019, C79000-G8976-C485-03
Subnet ID
m bits
Description of the location, also
subnet prefix or subnet
5.3 IPv6 address
Suffix
Interface ID
128 - n - m bits
Unique assignment of the host in the net‐
work.
The ID is generated from the MAC address.
IP addresses
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