For most point-to-point links, a unique pair of IP addresses is needed for each stack within a sysplex. This requirement tends to use more IP addresses, and IP addresses can be saved by using dynamic XCF. Dynamic XCF creates a single IP address by which all other stacks in a sysplex can reach a stack. Dynamic XCF creates trusted, internal links to other stacks within a sysplex, generating dynamic definitions for TCP/IP stacks that are on another z/OS® host in a sysplex or for TCP/IP stacks that are on the same z/OS host.
Dynamic XCF automatically generates the appropriate DEVICE, LINK, HOME, INTERFACE, BSDROUTINGPARMS, and BEGINROUTES definitions, and activates the devices to enable a stack to communicate with other stacks in the sysplex. Dynamic XCF devices and links, when activated, appear to the stack as though they had been defined in the TCP/IP profile, and can be displayed using standard commands.
Dynamic XCF support is available for both IPv4 and IPv6, and is enabled with the DYNAMICXCF parameter on the IPCONFIG or IPCONFIG6 statement, respectively. Though not specifically mentioned throughout this topic, unless otherwise noted, this information applies to IPv6 as well as IPv4.