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EqualLogic PS 6510 setup

Hi to all

I was aproached by some friends to help with setup of Hyper-V servers based on some refurbished HW. That company is in process of buying the following:

RFB - HP server DL580 Gen7, CPU X 2,4 x 4, 512 GB DDR, 146 GB x 2, 1200W x 4 - 2 servers (also reseler is stating that this server have some extra 10Gb card)

RFB - DELL storage EqualLogic PS 6510, 38 x 900GB HDD, 2 x 10GB  - 1 storage unit

RFB - Cisco Catalist 2960s 48 GigE Poe 370W 4XSFP LAN Base WS-C2960S-48LPS-L - 17 switches

and also RFB Cisco 4506 switch with 2 gigabit card, one for copper and the second for sfp ports.

Reseler told them that they can connect HP server directly to storage unit without need for extra SAN switch. As I can see in all manuals about this type of storage, you need to have switch (at least one, better two). I did browse around forums and some claim that this can be done (few of posters, without explanation how, eg do they have iscsi network connections all in same subnet, or each connection is like /30 subnet, or some other) and some claim that this can not be done with this storage. I know that from setup side even if it is possible to connect it directly it is not recomended (lost of packet in burst traffic periods, single point of failure, maybe freezing of vm machines while you scan for additional storage disk that you will be presenting, etc). I can not ask Dell direcly throug support page because that equipment is not in my company possesion, and company who will buy it don't have serial numbers in their possesion (also no support in this kind of buying will be billed, just HW).

So my question is will directly connected servers work at all with this storage? If not what is the bare minimum switch model (read cheap) that they need to buy so that they can have working system?

I did find this website and read config guides there

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