vsphere-esxi-vcenter-server-55-storage-guide

Chapter 11 Configuring iSCSI Adapters and StorageIf you change the iSCSI name, it will be used for new iSCSI sessions. For existing sessions, new settings willnot be used until logout and re-login.Setting Up iSCSI NetworkSoftware and dependent hardware iSCSI adapters depend on VMkernel networking. If you use the softwareor dependent hardware iSCSI adapters, you must configure connections for the traffic between the iSCSIcomponent and the physical network adapters.Configuring the network connection involves creating a virtual VMkernel interface for each physicalnetwork adapter and associating the interface with an appropriate iSCSI adapter.For specific considerations on when and how to use network connections with software iSCSI, see theVMware knowledge base article at http://kb.vmware.com/kb/2038869.Multiple Network Adapters in iSCSI ConfigurationIf your host has more than one physical network adapter for software and dependent hardware iSCSI, usethe adapters for multipathing.You can connect the software iSCSI adapter with any physical NICs available on your host. The dependentiSCSI adapters must be connected only to their own physical NICs.NOTE Physical NICs must be on the same subnet as the iSCSI storage system they connect to.Figure 11‐1. Networking with iSCSITwo physical NICs connected tothe software iSCSI adapterTwo physical NICs with iSCSIoffload capabilitiessoftware iSCSI adaptervmhba#dependent hardware iSCSI adaptersvmhba33vmhba34virtualvmk1 vmk2 vmk1adaptersvSwitchvSwitchvmk2Host1Host1vmnic1 vmnic2 vmnic1 vmnic2Host2Host2virtualphysicalphysical NICsphysical NICswith iSCSIoffloadcapabilitiesIP networkiSCSI storageiSCSI storageThe iSCSI adapter and physical NIC connect through a virtual VMkernel adapter, also called virtualnetwork adapter or VMkernel port. You create a VMkernel adapter (vmk) on a vSphere switch (vSwitch)using 1:1 mapping between each virtual and physical network adapter.VMware, Inc. 83