Ipv6 Terms - Siemens SCALANCE XM-400 Configuration Manual

Relationship between the IPv4 address and default subnet mask
There is agreement in terms of the assignment of IP address ranges and so-called "default
subnet masks".
The first decimal number of the IPv4 address (from the left) determines the structure of the
default subnet mask with regard to the number of "1" values (binary) as follows:
IP address range
1.x.x.x to 126.x.x.x
128.0.x.x to 191.255.x.x
192.0.0.x to 223.255.255.x
Note
In the bit representation of the subnet mask, the "ones" must be set left-justified; in other
words, there must be no "zeros" between the "ones".
2.6.5

IPv6 terms

Network node
A network node is a device that is connected to one or more networks via one or more
interfaces.
Router
A network node that forwards IPv6 packets.
Host
A network node that represents an end point for IPv6 communication relations.
Link
A link is, according to IPv6 terminology, a direct layer 3 connection within an IPv6 network.
Neighbor
A network node located on the same link as the network node.
IPv6 interface
Physical or logical interface on which IPv6 is activated.
Path MTU
Maximum permitted packet size on a path from a sender to a recipient.
Path MTU discovery
Mechanism for determining the maximum permitted packet size along the entire path from a
sender to a recipient.
SCALANCE XM-400/XR-500 Command Line Interface (CLI)
Configuration Manual, 06/2016, C79000-G8976-C252-11
2.6 Interface identifiers and addresses
Class
A
B
C
Description
Default subnet mask
255.0.0.0
255.255.0.0
255.255.255.0
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