User's Manual

Configuring GRE, NAT, RIPSO, and BFE Services
2-10
308625-14.00 Rev 00
A router does not “own” a translation unless it receives traffic using that
translation. If a router does not own a translation, it cannot delete it unless it
receives a deletion update from a peer router.
The example in Figure 2-5
shows two NAT routers configured as peers.
Figure 2-5. NAT Routers in a Synchronized Configuration
NAT synchronization works between routers configured as client/servers and also
those serving in load-balancing configurations.
A NAT router synchronizes dynamic address translations only. Static address and
N-to-1 translations are not synchronized.
Boston
Atlanta
New York
Santa Clara
London
New York
Houston
10.0.0.15
10.0.0.1
10.0.0.50
50.1.1.52
192.100.20.2
15.0.0.45
15.0.0.20
Company A Company B
IP0051X
Springfield
(NAT router 2)
Springfield
(NAT router 1)