ISCSI is a kind of the storage system having the LUNS .the Iscsi initiator role is taken by the ESXi host.
In this lab, we are going to see how to access an iSCSI datastore.
we are going to
1)Add a VMKernel port Group to a Standard Switch
2)Configure the iSCSI Software Adapter
vmkernal acts like an interface between the virtual macines and the hardwares of the system that is the network , vmkernal is runned on the bare metal directly on the vmware esxi hosts.
this vmkernal enables in the allocation of the memory , scheduling the cpus and offering the hardware needs,Operating systems
The main intention of a VMkernel port is to offer some kind of Layer 2 or Layer 3 services to the vSphere host.
now
Go to the Home then to Hosts and Clusters then to Data Center then to lab Servers then to ESXi Host 1named as host1.deepak.local 
select the Networking option in Manage categories here we are Selecting the vSwitch1 from the list of the below shown Virtual switches and click ‘Add host Networking’
click on add host networking option that is located at the corner , after a window is poped up Select Connection Type as VMKernel Network Adapter
this handles the works related to iscsi , migration and various other functions
we have to give a name in the Network Label in the port Properties option. , I have given it as ‘VMKernel’ . Keep other settings default and click ‘Next’
here we have to give VMkernel port IP and Subnet Mask and
then select ‘Finish’
after the configuration has done click on finish
then the vm kernal added
now we are going to configure iSCSI Software Adapter that has beeen made VMware EXSi.
It allows the ESXi host in creating a connection for the purpose of communication with the physical NIC
now we have to add storage adapter & Select the iSCSI adapter.
Go to the ‘Storage Adapter’ then select ‘Add new Storage adapter’ then select ‘select software iSCSI adapter’ and then click on Add . finalise by clicking ok.
Now we ahve to confirm that the iSCSI initiator name must be same If it does not match with ESXi iSCSI , replace it
Now select the newly created iSCSI adapters,
select the properties tab & verify whether the adapter status
conclusion :
by this we can access the IScsi storage this also helps in accessing the LUN’s that are being created on the simulator storage
for these all actions to be done the lab we must have to enable the Iscsi service in the ontap manager of the storage
DEEPAK-UPPU 