Figure 1 shows a logical diagram of the example sysplex named PLEXOF2D. Note that in this example, the two signaling structures are allocated in two different coupling facilities (as determined by the CFRM policy). This is done to maintain availability in case of a coupling facility failure or loss of connectivity to a coupling facility, and is the recommended configuration. However, this separation is not required; the two signaling structures can be placed in the same coupling facility. The example also shows three CTC connections between SYSA and SYSB.

Figure 1. Example 5 — Diagram of PLEXOF2D