User's Manual Part 1

3: Detailed Description
APCD-LM043-8.0 (DRAFT C) 33
3.4.1 Addressing of Packets
Figure 21 shows how the source and destination MAC and IP addresses are sent in packets
travelling between the end-user’s PC and the Internet network servers.
Figure 20 Addressing of Packets—Routed Mode
Network Server
NAP Router
(no NAT)
EUM CCU BackhaulSwitch
End-user PC
Internet Router
(several)
Network Server IP Address
End-user PC IP Address
End-user PC MAC
Address
CCU Radio MAC
Address
Destination IP
Address
Source IP
Address
Destination
MAC Address
Source MAC
Address
AABB
Destination IP
Address
Source IP
Address
Destination
MAC Address
Source MAC
Address
Destination IP
Address
Source IP
Address
Destination
MAC Address
Source MAC
Address
Destination IP
Address
Source IP
Address
Destination
MAC Address
Source MAC
Address
NAP Router MAC
A
Address
CCU Ethernet MAC Address
Internet Router
MAC
A
Address
Network
Server MAC
Address
NAP Router
MAC
B
Address
Internet
Router MAC
B
Address
End-user PC IP Address
Network Server IP Address
CCU Radio MAC
Address
End-user PC MAC
Address
CCU Ethernet MAC Address
NAP Router MAC
A
Address
NAP Router
MAC
B
Address
Internet
Router MAC
B
Address
Internet Router
MAC
A
Address
Network
Server MAC
Address
End-user PC to Network Server
Network Server to End-user PC
Backhaul