Hello,
You have not mentioned whether you are using FC, SAS, or iSCSI. Your fabric makes a difference. Since you are connecting this with ESXi there are specific SAN considerations. If using SAS and you have stand alone servers you can direct connect. With FC you can direct connect or use a switch. If using iSCSI you can connect either with 1G or 10Gb (depending on MSA controllers, switches, and network cards) but you must use a switch. With iSCSI direct connect is not supported.
I suggest you refer to our supported configurations to help you decide on which network card you need for the array and servers you have.
SPOCK: https://h20272.www2.hpe.com/spock/
Cheers,
Shawn
I work for Hewlett Packard Enterprise. The comments in this post are my own and do not represent an official reply from HPE. No warranty or guarantees of any kind are expressed in my reply.