2.1.5 Planning for network connectivity The z/OS Linux virtualization layer gives virtual access to the z/OS TCP/IP network through  use of the  virtio  Linux interface. Figure 2-9 on page 33 shows you the general overview of  the zCX virtualization layer that exists inside the zCX virtual Docker server address space. In Figure 2-10 on page 34 a red arrow points to the dynamic virtual IP address (DVIPA),  named 10.1.2.1 for your Docker server inside a single zCX address space. This is a z/OS  owned, managed, and advertised DVIPA. In contrast to a static IP address, the DVIPA allows  you to restart your zCX instance on another z/OS system in your sysplex. This capability is an  advantage during planned or unplanned z/OS system outages. Figure 2-9 z/OS Linux virtualization layer Chapter 2. z/OS Container Extensions planning  33