User's Manual

Configuring GRE, NAT, RIPSO, and BFE Services
2-6
308625-14.00 Rev 00
In Figure 2-3, the NAT router dynamically translates the source address,
10.0.0.15, to one of the available global addresses (in this case, 192.55.10.3) and
creates a new entry in the local/global translation entry list.
Figure 2-3. NAT Updates the Local/Global Translation Entry List
NAT router
Local address
range list
Global address
range list
Current local/global
mapping entry list:
10.0.0.1 192.55.10.1
10.0.0.2 192.55.10.2
10.0.0.15 192.55.10.3
10.0.0.15
IP packet
Source address Destination address
IP0053A
15.0.0.0 to 15.255.255.255
50.1.1.0 to 50.1.1.255
192.55.10.0 to 192.55.10.255
192.20.10.0 to 192.20.10.255
192.100.20.2
10.0.0.0 to 10.255.255.255