iSCSI hardware vs software adapter

Hey all -

I'm trying to figure out a vMotion (the issue being that it has essentially stopped working). A lot of what I read pins vMotion storage problems, so I start there. Anyway, while I was stung by storing a question occurred to me:

If you have natachasery that can handle unloading iSCSI, iSCSI Software adapter should be disabled? that is, you should only use the adapter software if you do not have the ability to discharge with your physical network adapters, correct? Also, someone a hunch as to whether or not there was no disturbance, if I disable the software adapter (as far as LUNS are all showing on the HBA hardware)?

Thank you

-Chris

It is a good question. I had the same setting up my storage. OK he think like this: If you have two ports on a 10 GB of a PS6010 controller, you technically "two" paths to an ESXi host, because each port has an IP address. You can see what path is related to IP in the section manage paths, in the target box (or below the paths section) say now you have two members, and both bear the same characteristics, you have now four active paths (e/s). It's really whatever the physical connection outside of the host. You might have a physical SFP + NIC and it would record two paths since you have two addresses targets, even if you have a "physical" path Kinda like a-< split="" if="" you="" want="" to="" think="" of="" it="" like="">

All the below assumes that you have a dedicated set of switches, links dedicated to each Member and each switch with failover best practices in place. It is recommended that you isolate your network from your normal network storage. If you try to share the EQL storage with the normal operation of the network, you add an unwanted complexity.

What you need to do is to make sure that your VMkernel iSCSI denomations are linked up to the the right vmnic. Under your EQL iSCSI vSwitch properties make sure you that you wanted to make a replacement of the switch for vmnic assignments (put the host in maintenance mode in order to test everything without killing any connection VM):

  • Click your vSwitch properties, select iSCSI0 and press 'change '.
  • Tab grouping of NIC, be sure that the order of failover is selected for "substitution vSwitch order of failover
    • Active adapters: vmnic 0
    • Unused cards: vmnic 1, vmnic 2
  • Follow these steps for the other two iSCSI designations, ensuring that you have only one per group of iSCSI ports.

Something I noticed is that you don't have a group of dedicated port of vMotion. This should be done just for the sake of consistency, but does not mean that you must burn a port just for vMotion. In my environment, the port assignment looks like the attached screenshot (vSwitch assignments.png). Both of the vmnic are assigned to my group of ports of vMotion.

Finally, make sure that MEM has linked the vmnic associated with iSCSI (above) to iSCSI Software adapter (vmhbaxx) traffic. You may want to just start over and delete the vSwitch, rerun installation MEM everywhere and then perform the steps above. But I need to show you what was going on until I told you to catch the vmnic and target the vmhba for the iSCSI Software initiator.

At the end of this, you will have a configuration like this:

  • NIC teaming override for a vmnic for each port group.
  • All THE vmnic which is used for iSCSI communication RELATED to iSCSI Software adapter vmhba (i.e. vmhba36) using the 'config' MEM Setup Wizard
  • All the paths in your storage space must be Active (e/s)

Does make sense? Joined a MEM so cheat sheet. It is based on the goal. I guess I call the sheet when I need to set it up in a hurry. You can see that Dell is too attached.

Hope that helps.

Tags: VMware

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