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Niyot1
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vSAN iSCSI target configuration

What are thevSAN iSCSI target limitations. 

I have an Oracle RAC server that needs to have 2 iSCSI networks for resilience.   

Can i have 2  VMks connect to 1 iSCSI taget lun?

 

 

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bmcb555
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Hi,

This is all covered off here

https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan.doc/GUID-13ADF2FC-9664-448B-A9...

Yes you can have two vmk ports to the same Lun and it's considered best practise. Just have the vmk on two different hosts in the vSAN

For the limitations look here

https://kb.vmware.com/s/article/57344

Unsupported usage as a target for other ESXi hosts

Unsupported usage with third-party hypervisors

Migrations using raw device mapping (RDMs)

No support for Multiple Connections per Session (MCS)

 

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Niyot1
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Hi There bmcb555

Thanks for your reply,   I tried configuring this already but wasn't able to do so.    

I have an existing target already then i went in to edit the target, in the network option i am able to select only one vmk from the drop down.  want i need to do is not listed in the limitations but it could well be. 

are you able to provide steps on how to configure this?

Thanks

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bmcb555
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When you have selected a vmk, it is enabled on all hosts in the vSAN cluster for that vmk. E.g if you used vmk1 it'll be vmk1 on host 1, 2 and 3. 

You then configure each vmk IP as a discovery target on the initiator side. You can see this is what is done here 

https://www.virtualizationhowto.com/2019/09/configure-vmware-vsan-iscsi-for-windows-server-failover-...

Adding the vSAN iSCSI LUN to Windows Server Failover Cluster WSFC - There is an IP for each of the hosts listed. If you're asking can you have multiple vmk on the same hosts then as far as I know that is not possible.

Niyot1
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Thanks for responses.   It does look like its a vSAN iSCSI limitation. 

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