Siemens SCALANCE XM-400 Configuration Manual page 46

Description
2.6 Interface identifiers and addresses
IP addresses of the interface
Header
Fragmentation
Quality of service
Types of frame
Identification of DHCP cli-
ents/server
46
IPv4
4 IP addresses
Checksum
•
Variable length
•
Fragmentation in the
•
header
No security
•
Host and router
Type of Service (ToS) for
prioritization
Broadcast, multicast,
unicast
Client ID:
MAC address
IPv6
Multiple IP addresses
LLA: A link local address (formed automatically)
•
fe80::/128 per interface
ULA: Several unique local unicast addresses per inter-
•
face
GUA: Several global unicast addresses per interface
•
Checking at a higher layer
•
Fixed size
•
Fragmentation in the extension header
•
Only endpoint of the communication
The prioritization is specified in the header field "Traffic
Class".
Multicast, unicast, anycast
DUID + IAID(s) = exactly one interface of the host
DUID = DHCP unique identifier
Identifies server and clients uniquely and should not change,
not even when replacing network components!
IAID = Identity Association Identifier
At least one per interface is generated by the client and re-
mains unchanged when the DHCP client restarts
Three methods of obtaining the DUID
DUID-LLT
•
DUID-EN
•
DUID-LL
•
SCALANCE XM-400/XR-500 Command Line Interface (CLI)
Configuration Manual, 06/2016, C79000-G8976-C252-11