Figure 3-8 Storwize V7000 iSCSI overview Both onboard Ethernet ports of a Storwize V7000 node can be configured for iSCSI. For each  instance of an iSCSI target node (that is, each Storwize V7000 node), you can define two  IPv4 and two IPv6 addresses or iSCSI network portals: GLYPH<SM590000> Decide whether you implement authentication for the host to Storwize V7000 iSCSI  communication. The Storwize V7000 supports the Challenge Handshake Authentication  Protocol (CHAP) authentication methods for iSCSI. GLYPH<SM590000> iSCSI IP addresses can be configured for one or more nodes. GLYPH<SM590000> Generally, enable jumbo frames in your iSCSI storage network. GLYPH<SM590000> If the optional 10 Gbps Ethernet feature is installed, you can use them for iSCSI traffic. 3.7.1 iSCSI protocol 3.7.2 Topology and IP addressing The iSCSI connectivity is a software feature that is provided by the Storwize V7000 code. The  iSCSI protocol is a block-level protocol that encapsulates SCSI commands into Transmission  Control Protocol/Internet Protocol (TCP/IP) packets. Therefore, iSCSI uses IP network rather  than requiring the Fibre Channel infrastructure. The iSCSI standard is defined by Request For  Comments (RFC) 3720. For more information about iSCSI protocol, see  iSCSI Implementation and Best Practices on  IBM Storwize Storage Systems , SG24-8327. For more information about examples of topology and addressing schemes that can be used  for iSCSI connectivity, see 3.5, “Pla nning IP connectivity” on page 48.  If you plan to use node’s 1 Gbps Ethernet ports for iSCSI host attachment, dedicate Ethernet  port one for the Storwize V7000 management and port two for iSCSI use. This way, port two  can be connected to a separate network segment or virtual local area network (VLAN)  dedicated to iSCSI traffic. Chapter 3. Planning  61