Let's begin, now log into System Manager on your FAS/AFF system. Navigate to the LUNs section and take a look at the initiator Groups as shown below:
From here you can see the list of initiators which are used for Fiber Channel connections. Now to add more physical connections click on Portsets are the top of the screen in the tab. As shown below:
So once you click on Portset name then click on Edit. This will pop up a list of physical ports in the cluster. Select all of the ports you want to join the portset and click save. Make sure all of the physical ports have been zoned to hosts and controllers.
Now we should check to make sure the Reporting node sees all of the ports we have just setup. To check this log into the NetApp cluster via SSH. Once logged into the system you will need to check via these commands. Please note that you will need to go into Diagnostic mode. Please use caution. This is none disruptive but typing the wrong commands may result in outage. Please note that [ ] are not needed, this is just for you to replace with your information.
set d lun mapping show -vserver [SVM_Name] -volume [Volume_Name] -fields reporting-nodes
The information should show all of the paths to the host. If we want to add more reporting nodes use the following command
lun mapping add-reporting-nodes -vserver [SVM_Name] -volume [Volume_Name] -lun [LUN_Name] -igroup [iGroup_Name] -destination-aggregate [Aggregate_Name]
Now you can check with the same command above to make sure more have been added
lun mapping show -vserver [SVM_Name] -volume [Volume_Name] -fields reporting-nodes
Now to check to make and sure you have all of the nodes and paths, open Disk Management on the Windows Server connected to NetApp and rescan the Bus. You should see all of the paths now listed in the properties of the disk. Below is a screen shot, look at the MPIO.