11.8.8 Supported configurations Note:  For explanation purposes, this section shows a node with 2 ports available: 1 and 2.  This number generally increments when IBM SAN Volume Controller nodes model DH8 or  SV1 are used. The following supported configurations for IP partnership that were in the first release are  described in this section: GLYPH<SM590000> Two 2-node systems in IP partnership over a single inter-site link, as shown in  Figure 11-98 (configuration 1). – System A – System B As shown in Figure 11-98, two systems are available: A single remote copy port group 1 is created on Node A1 on System A and on Node B2 on  System B because only a single inter-site link is used to facilitate the IP partnership traffic.  An administrator might choose to configure the remote copy port group on Node B1 on  System B rather than Node B2.  At any time, only the IP addresses that are configured in remote copy port group 1 on the  nodes in System A and System B participate in establishing data paths between the two  systems after the IP partnerships are created. In this configuration, no failover ports are  configured on the partner node in the same I/O group.  Chapter 11. Advanced Copy Services  583 Figure 11-98 Single link with only one remote copy port group configured in each system