Question : Setting up MPIO for CSV on Failover clustering

I previously had a Windows server 2008 R2 setup with aan iscsi san for HA failover clustering.
I had a port on each device nic dedicated for Iscsi traffic.  I think I would like to try MPIO for additional protection.  What items do I need and how do I set it up?  Do I just add three more nic ports on different cards (one each device) to the same network and switch or are they on their own network and switch?
-SM

Answer : Setting up MPIO for CSV on Failover clustering

At a minimum, you will need an additional port per device.  

These are all on the same network (and switch), but they will have to be on their own fabric.  A fabric consists of one of the available ports (and the iSCSI card), the switch, and the port on the far end storgae device.  Each of your Servers need to have at least two fabrics set up for MPIO to work.

Start by installing the iSCSI cards in at least two ports per device.  Next, install the card driver and then the MPIO software for each server.

Setting up an iSCSI san for MS SQL Server (some good tips in general):  http://msdn.microsoft.com/en-us/library/bb649502(SQL.90).aspx#_Toc169804521

A QLogic primer on SAN side setup (shows WWName use and contains some good tips): http://www.qlogic.com/SiteCollectionDocuments/Education_and_Resource/whitepapers/whitepaper1/qlogic_wizard_web.pdf

As you install the iSCSI cards, note the WWName of each card (essentially the MAC type identifier).  Use the WWName of the card to configure the switch for MPIO traffic.  You will have to identify which WWName is for which server fabric (depending on your switch model the process may vary).

After the server has been set up and the switch has been configured, all you need to do is configure the storage end device for MPIO.