EqualLogic PS6100X: direct connections (double) iscsi to 3 vmware ESX host

Hello

Due to the reduction of costs, we integrate

1 x ps6100x Dell Equallogic (2 controllers to each 4 ports)

3 x dell poweredge r720 (each have 2 ports dedicated for trafficking SAN storage)

vSphere 5.5 (shared storage on the San)

Without the use of SAN switches. Each host has dual direct connection (1 to each SAN controller) with the initiator iscsi software.

We did before with Dell MD3200i, who has also 2 controllers and 8 ports, so we expect no problems.

But now that I have read on the Equallogic, I'm starting to become uncertain if this Setup will work?

I know that this is not recommended, but at this point, my only concern is that it will work (even with less performance).

Can you please give me some advice on this?

Best regards

Joris

P.S. If this is probably NOT possible, what would be the best/low average cost to make this possible?

I've seen this failure at work, as in the connections dropped, BSOD was virtual machines with a single host with no switch.  iSCSI traffic tends to be very burst, which is having when the right switch pays you back.

Re: 3750 X are those good switches, there is some adjustment settings that need to be addressed.  Also to solve a flowcontrol problem download the most current IOS firmware.

For such a small group / number of servers, the stacked 2960 would be OK.  Perhaps to problems later if you need to scale this environment.  lack of 2960 allocate buffer, then you want to start without Jumbo frames, all enter into stable and of good practices.  So maybe later try enabling it.  3750 X works very well with Jumbo and Flowcontrol active BTW.

These choices are better than no switch miles.  3750 x were pretty expensive last time I looked.  Unless you have a little already.  If you share them with the rest of the traffic that is not optimal, but at least put all ISCSI traffic on its own VIRTUAL local network.

4948 are the right choice.  Some high-end HP switches.  Step away from the elders, like 2810 or 2824/48.  They seem to be there for cheap $$ but are designed for GbE Office not GbE iSCSI.

Kind regards

Tags: Dell Tech

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