1. ISP Edge NAT 10/8 “Home” Network Upstreams and Peers 192.0.2.1/32
ISP-provided
Address
10/8
“Home” Network

2.
TCP Port 2000
TCP Port 3000
TCP Port 4000
NAT

3. ISP Edge NAT 10/8 “Home” Network 192.0.2.1/32 public address
/32
RFC 1918
Address
/32
public
address

4. ISP Network Large Scale NAT Upstreams and Peers Customer Edge NATs
Public Address
Domain
Private Domain
Partition A
Partition B
Partition C
Large Scale NAT
Customer
Edge NATs
ISP Network

5. IPv4 Internet D-S-Lite Home Gateway Carrier NAT
IPv4
Internet
D-S-Lite
Home Gateway
Carrier NAT
Src:
Dst:
TCP Port
Src: 10000
Dst: 80
IPv6
Src: 2001:0:0:1::1
Dst: 2001:0:0:2::1
Src:
Src: 5000 SP
IPv6 Network

6. IPv4 Internet CPE NAT A+P Router
IPv4
Internet
CPE
NAT
Src:
Dst:
TCP Port
Src: 2001
Dst: 80
Src:
Src: 10000
IPv6
Src: 2001:0:0:1::1
Dst: 2001:0:0:2::1
A+P Router SP
IPv6 Network

7. IPv4 Internet CPE A+P Carrier NAT A+P Router NAT
IPv4
Internet
CPE
A+P
Carrier NAT
A+P Router SP
Dual Stack
Network
IPv6 tunnel
IPv4 Private
Address Space
NAT

8. ISP Edge Equipment Encapsulated Tunnel [used in some models] CPE
IPv4 Internet
(Public Address)
ISP Edge
Equipment
Encapsulated
Tunnel
[used in some models]
CPE
Edge Network
(Private Address)