6.0.1

Table Of Contents
Figure 101. Networking with iSCSI
physical NICs
vmnic1 vmnic2 vmnic1 vmnic2
physical NICs
with iSCSI
offload
capabilities
Host1
Host1
Host2
Host2
virtual
adapters
software iSCSI adapter dependent hardware iSCSI adapters
vSwitch
vmk1 vmk2 vmk1
vmhba33vmhba# vmhba34
vmk2
vSwitch
virtual
physical
Two physical NICs connected to
the software iSCSI adapter
Two physical NICs with iSCSI
offload capabilities
IP network
iSCSI storage iSCSI storage
The iSCSI adapter and physical NIC connect through a virtual VMkernel adapter, also called virtual
network 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.
One way to achieve the 1:1 mapping when you have multiple NICs, is to designate a separate vSphere
switch for each virtual-to-physical adapter pair.
N If you use separate vSphere switches, you must connect them to dierent IP subnets. Otherwise,
VMkernel adapters might experience connectivity problems and the host will fail to discover iSCSI LUNs.
The following examples show congurations that use vSphere standard switches, but you can use
distributed switches as well. For more information about vSphere distributed switches, see the vSphere
Networking documentation.
Chapter 10 Configuring iSCSI Adapters and Storage
VMware, Inc. 89