Windows 2012 MPIO

We have 2 HP DL 380 Gen 8 servers  with windows 2012 installed on  each of them.
Each server has four NIC's . We are setting up a HyperV cluster. Out of the 4 NIC's, 2 NICs would be teamed for VM traffic. one NIC and ISCSI traffic and one NIC for heartbeat.
We are using HP P2000 as shared storage . On HP P2000 4 NIC are plugged to the iSCSI vlan.
So my question is do I need to install MPIO's on the windows 2012 servers. I thinking as we are using just one NIC on each server for iSCSI traffic we don't need to.
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Malli BoppeAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
to establish multiple paths to the LUNs on the iSCSI SAN yes, because you've got single IP Address to 4 IP Addresses on the SAN.


4 potential paths for iSCSI traffic.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
If you are only using a single NIC for iSCSI traffic, then there is no requirement for the MPIO module.

But I would recommend, you use at least two nics, install MPIO, and you will have resilience, and increased throughput to your iSCSI SAN.

Also ensure you enable Jumbo Frames on your network interfaces, network switches, and SAN.
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Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
I concur with hanccocka and would go further and suggest your install another 4 GB ethernet card for following reasons:

1. Create a management network where Hyper-V hosts run and this should not be the same VLAN as your application servers (use a dedicated NIC)
2. Additional NICs for iSCSI
3.  Use a dedicated NIC/network for live-migration
4. If backing up servers to a remote backup server then you should consider using a a dedicated network
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
if you are going to cluster, the minimum required is 8 physical network interfaces

2 - VM Network Traffic
2 - iSCSI (MPIO)
2 - Live Migration Team
2 - Cluster HeartBeat Team
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Malli BoppeAuthor Commented:
Thanks Guys

@ hanccocka

Can you provide any MS documentation about the minimum cluster requirements showing that we need 8 NICs
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
http://blogs.technet.com/b/keithmayer/archive/2012/12/12/step-by-step-building-a-free-hyper-v-server-2012-cluster-part-1-of-2.aspx#.UiiTVj8TlpN

if this is a production system, you will really want to team for resilience, to reduce single points of failure - this is recommended.
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Malli BoppeAuthor Commented:
Thanks Hanccocka

Just want to confirm that we don't need to use MPIO when using single niC on the HYperV server even when we have 4 NIcs from the SAN on the iSCSI network
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
No requirement for MPIO on a single NIC.

MPIO is for more than one nic.
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Malli BoppeAuthor Commented:
So on the SAN out of the 4 iscsi NIC if one of them fails will the hosts still be able to access the data
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
In you want to use 4 nics on the SAN, from a single interface on the server, install MPIO.

If a nic fails on your server, host will not be able to access the data.
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Malli BoppeAuthor Commented:
So you still need MPIO on the server even when using a single NIC
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