Ipv4 / Ipv6 - Siemens SIMATIC NET System Manual

Basics of communication with Industrial Ethernet
1.3 Technologies of Industrial Ethernet
1.3.2.3

IPv4 / IPv6

What are the essential differences?
IP configuration
Detecting duplicate IP ad-
dresses
Available IP addresses
Address format
Loopback (local computer)
32
IPv4
DHCP server
•
Manual
•
32-bit: 4, 29 * 10 ad-
9
dresses (32-bit)
Decimal: 192.168.1.1
with port: 192.168.1.1:20
127.0.0.1
IPv6
Stateless Address Autoconfiguration (SLAAC): Stateless
•
autoconfiguration using NDP (Neighbor Discovery Proto-
col)
– It creates a link local address for every interface that
does not require a router on the link.
– It checks the uniqueness of the address on the link
that requires no router on the link.
– It specifies whether the global addresses are obtained
via a status-free mechanism, a mechanism with status
or via both mechanisms. (Requires a router on the
link)
Manual
•
DHCPv6
•
Duplicate address detection
Procedure to ensure that an IP address is only assigned to
one interface within the framework of the Stateless Automatic
Address Configuration.
What happens if the address is duplicated? An LLA must
then be assigned manually.
128-bit: 3, 4 * 10 addresses
38
Hexadecimal: 2a00:ad80::0123
with port: [2a00:ad80::0123]:20
::1
System Manual, 09/2019, C79000-G8976-C242-10
Industrial Ethernet