iscsi load balance policy.

I have been using dell equallogic and using  " route based port virtual port id"  for iscsi storage, that what I was told to use .
Client of ours is using " route based ip hash" for iscsi . It is bit surprised me that the system is working an did not break.
The admin guy pointed me the below link saying that if it is wrong then vmware does not say to use " route based ip hash " in the below link.

Experts out there can we use ip hash for iscsi , if it is ok i believe that iscsi will utilize the multiple vmnic ?
i will appreciate if you can explain why we should use " route based port virtual port id" only not ip hash.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
I'm sorry to inform you, that NO load balance policy is recommended for iSCSI Storage Network.

Best Practice is to setup your iSCSI Network as per my EE Article.

HOW TO: Add an iSCSI Software Adaptor and Create an iSCSI Multipath Network in VMware vSphere Hypervisor ESXi 5.0

this article is applicable to all 5.x and 6.0.

also enable Jumbo Frames, this is how we've been setting it up for many years for ALL our clients, with iSCSI SANs, especially those with Dell; Equallogic.

Also, you will want to download the HiT (Host Integration Kit) from Dell, and also add there MEM Path Policy driver.

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iSCSI port binding can be used if most vmnics are in the same subnet, its the only way to get any form of failover/load balancing with iSCSI. Anything else is not supported.

Andrews article pretty much talks you through it......he is a vExpert for a reason!
sara2000Author Commented:
I agree and i was told by dell support to use " route based port virtual port id".
Why vm suggest " route based ip hash" for both NFS and iscsi in my above link?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
I have no idea why Dell Support would recommend such things, do you mean Dell or Equallogic Support, they verify our configurations, with every installation, and they have never suggested load balance.

Not all VMware KB articles are correct!

and see here...

"This article provides information on setting up the correct NIC teaming policies to allow iSCSI port binding."

sara2000Author Commented:
Step 7 in the link,
It does not mention anything about Load balancing , do we leave that default " route based on originating virtual port" ?

VMware does not say which to choose?
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, leave as default for your vSwitch, it will not do any load balancing.

Best Practice, follow my EE will show you how to set this up step by step...

bindings are the important piece, how each VMKernerl is bound to a nic for iSCSI, and then you create the resilience for failover!

that allows the iSCSI to communicate, and then for load balancing, and multi path, you add the Dell MEM kit.
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