I was checking for best practices how to provide centralized storage on a VNX 5400 (block) (2 iSCSI IO modules with 2 ports each) to ESXi hosts (vsphere.6.0).
While I read in the VMware best practices (https://www.vmware.com/content/dam/digitalmarketing/vmware/en/pdf/whitepaper/iscsi_design_deploy-whi...) multipathing that port binding is recommended to allow for multipathing, I found in the documents related to the VNX (e.g. https://www.vmware.com/content/dam/digitalmarketing/vmware/en/pdf/whitepaper/iscsi_design_deploy-whi...) that port binding is not recommended but using dynamic discovery only.
Probably, VMware's recommendation is only valid in the case of the target begin reachable via a single IP-address, which is not the case on the VNX..?
Please confirm that I still should configure the 2 uplinks on the ESXi hosts (respecively the portgroups) to be one active, the other one unused and vice versa.
Thanks a lot!
I found this discussion but it does not really reflect/answer my questions above..
Re: VMware - iSCSI - VNX - Port Binding Question - Single Subnet vs. Multiple Subnets
We (EMC) recommend for iSCSI connections you use the following:
Also, please see the following white paper:
Additional, you'll need to disable TCP Delayed ACK on all the hosts using iSCSI.
VMware ESX host server, see KB 459336 - Why is ESX performance slow when using iSCSI?
I would also recommend that you change the IO Operation Limits from the default of 1000 to 1
Hi, I use the next connectivity example for iSCSI to VNX or Unity:
Without port binding:
Use the next example without port binding:
VMware Training - iSCSI and VMware vSphere 5 - Method 1 - YouTube
Is good idea use jumbo frames (9000 MTU)