You can assign one IPv4 address and one IPv6 address to each Ethernet port on the system  platforms. Each of these IP addresses can be shared between iSCSI host attach and the IP  partnership. The user must configure the required IP address (IPv4 or IPv6) on an Ethernet  port with a remote copy port group. The administrator might want to use IPv6 addresses for remote copy operations and use IPv4  addresses on that same port for iSCSI host attach. This configuration also implies that for two  systems to establish an IP partnership, both systems must have IPv6 addresses that are  configured.  Administrators can choose to dedicate an Ethernet port for IP partnership only. In that case,  host access must be explicitly disabled for that IP address and any other IP address that is  configured on that Ethernet port.  Note:  To establish an IP partnership, each IBM SAN Volume Controller node must have  only a single remote copy port group that is configured, 1 or 2. The remaining IP addresses  must be in remote copy port group 0. 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). Figure 11-98 Single link with only one remote copy port group configured in each system 556  Implementing the IBM Storwize V7000 with IBM Spectrum Virtualize V8.2.1