IBM SC41-5420-04 manual Example The Multihoming function, Multihoming TCP/IP Network

an Internet address of different TCP/IP networks. With these multiple Internet addresses, you take part in different TCP/IP networks (Figure 51).

This example is a combination of all of the previous examples discussed.

Figure 51. Multihoming - Multiple Hosts, Multiple Networks, Multiple Lines

Example: The Multihoming function

Assume servers SYSNAM02 and SYSNAM03 are connected with a public or private X.25 network. The Internet address of this network is 9.4.73.64.

In this example, the server SYSNAM03 connects with a service provider by using TCP/IP and the same X.25 network attachment (Figure 52). The Internet address assigned by the service provider for the server is 223.1.1.17.

Figure 52. Multihoming TCP/IP Network

The multihoming function supports multiple networks with the same adapter. Server SYSNAM03 must handle two different Internet addresses on the same attachment. To do this, an additional TCP/IP interface needed to be specified (Figure 53 on page 60).

Chapter 2. TCP/IP: Operation, Management, and Advanced Topics 59