Red Hat ENTERPRISE LINUX AS 2.1 Installation Manual page 108

108 Chapter 6:Linux Virtual Server Overview
6.4.1 NAT Routing
Figure 6–3, An LVS Cluster Implemented with NAT Routing, illustrates an LVS cluster utilizing NAT
routing to move requests between the Internet and a private network.
Figure 6–3 An LVS Cluster Implemented with NAT Routing
In the example, there are two NICs in the LVS router. The NIC for the Internet has a real IP address
on eth0 and has a floating IP address aliased to eth0:1. The NIC for the private network interface
has a real IP address on eth1 and has a floating IP address aliased to eth1:1. In the event of failover,
the virtual interface facing the Internet and the private facing virtual interface are taken-over by the