iSCSI Multipath with Hyper-V Core 2012 using Powershell

Posted on 2013-10-21
Medium Priority
Last Modified: 2016-11-23
I am a real Powershell newbie and not real familiar with iSCSI either. I have just rolled out my first 2012 server using Hyper-V Core install on a Dell Poweredge server, putting the VM's on a Equallogic SAN. I followed the Step by Step guide here, http://blogs.technet.com/b/keithmayer/archive/2013/03/12/speaking-iscsi-with-windows-server-2012-and-hyper-v.aspx
but I don't think I have it right as far as MPIO is concerned.

On the server I have 4 nics, 2 on the lan subnet and 2 on the iSCSI SAN subnet, lets say the SAN Nics are x.x.40.1 and x.x.40.2. On the Equallogic there are 3 Nics, 1 on the lan for a management interface and 2 on the iSCSI subnet, say x.x.40.10 and x.x.40.20. The Equallogic also has a group member ip address on the iSCSI subnet, x.x.40.15

The 4 server nics and the 3 EQL nics are connected to a GB Switch.

So when I make my New-IscsiTargetPortal -TargetPortalAddress x.x.40.? I can make a connection on any of the 3 40.x addresses on the Equallogic. If I want MPIO to work should I use the group member ip? or do I need to make both of the physical Nics Portals?

If I make the Member IP the iSCSI target, then Enable-MSDSMAutomaticClaim –BusType iSCSI how does it know to use the 2 physical nicsto get there?

And there does not seem to be any command to show what nics are being claimed by MPIO DSM. Do I just have to monitor traffic on the 2 .40 nicks to see that both are being used?

Sorry for the naive newbie questions but the PS learning curve is steep and I have been pouring over the docs for days and this multipath business still remains obscure.
Question by:mraineynola
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Accepted Solution

kevinhsieh earned 1500 total points
ID: 39591368
When using EqualLogic, install the EqualLogic Host Integration Tools (HIT) from the EqualLogic support site. The HIT Kit allows you to properly configure MPIO and snapshots. All configuration is done against the group IP. You don't ever specifically hit the IP of a NIC unless you have multiple EqualLogic arrays and you need to administer a specific member.

Author Closing Comment

ID: 39599372
Thanks, that provided some clarity. I decided to blow away the Hyper-V core install, just too much PowerShell H*ll and installed the Gui with Hyper-V role. Got a lot more clarity about how to MPIO the interfaces in the Gui. Monitoring the nics in the EQL manager and can see that the round robin algorithm is working perfectly.
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Expert Comment

ID: 39599378
My experience with Hyper-V is that you don't need to use any PowerShell. Just use config to join the host to the domain and configure basic networking. Hyper-V Manager from a remote system for everything else.

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