This section presents a sample configuration for a connection between WEST and EAST, where EAST has a dynamic IP address (it is configured as a DHCP client) and is configured for dynamic DNS. In this example:

• EAST has a dynamic IP address from WEST's point of view but WEST can initiate connections to EAST because EAST's hostname remains constant even though its IP address may change.
• WEST retains its fixed IP address.

When you have finished, these systems will be configured as shown in the following figure.

Before you begin:

• This example assumes that you have already configured a basic site-to-site connection using a pre-shared key between WEST and EAST, as explained in the section Basic site-to-site connection. Only the relevant changes to that configuration are presented here.