There are many technologies included in the z/OS Communications Server that enable you to design and implement highly available and scalable z/OS Sysplex networking scenarios, and most of you have been using those technologies for many years. How do you extend those capabilities to the zEnterprise environment, or more specifically, to the Inter-Ensemble Data Network (IEDN)? When a z/OS system is part of a z/OS Sysplex and needs to be connected to both a remote network and to the IEDN, some special considerations must be used when designing for high availability and workload management. This session will analyze those considerations and discuss a few selected network topologies to illustrate the design and implementation considerations. The session will cover topologies that include applications deployed on Power and X86 blades and also optimizers in the zBX, such as the IBM WebSphere DataPower Integration Appliance XI50 for zEnterprise (DataPower XI50z).