2.6.3
IPv4 / IPv6
What are the essential differences?
IPv4
IPv6
IP configuration
● DHCP server
● Manual
● Stateless Address Autoconfiguration (SLAAC): Stateless
autoconfiguration using NDP (Neighbor Discovery
Protocol)
– Creates a link local address for every interface that
does not require a router on the link.
– Checks the uniqueness of the address on the link that
requires no router on the link.
– 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 (status dependent)
Available IP addresses
32-bit: 4, 29 * 10
9
address‐
es
128-bit: 3, 4 * 10
38
addresses
Address format
Decimal: 192.168.1.1
with port: 192.168.1.1:20
Hexadecimal: 2a00:ad80::0123
with port: [2a00:ad80::0123]:20
Loopback
127.0.0.1
::1
IP addresses of the interface
4 IP addresses
Multiple IP addresses
● LLA: A link local address (formed automatically) fe80::/128
per interface
● ULA: Several unique local unicast addresses per interface
● GUA: Several global unicast addresses per interface
Header
● Checksum
● Variable length
● Fragmentation in the
header
● No security
● Checking at a higher layer
● Fixed size
● Fragmentation in the extension header
Fragmentation
Host and router
Only endpoint of the communication
Quality of service
Type of Service (ToS) for
prioritization
The prioritization is specified in the header field "Traffic Class".
Types of frame
Broadcast, multicast, uni‐
cast
Multicast, unicast, anycast
Description
2.6 Interface identifiers and addresses
SCALANCE W770/W730 acc. to IEEE 802.11n Command Line Interface
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Configuration Manual, 09/2017, C79000-G8976-C324-08