Re: Connect ESXi host to VNX5300
The iSCSI discovery protocol says you only need one IP address on the array to discover all the ports on the array. The VNX will return all SP ports configured with IP addresses..
Take a look at Support Solution emc245445 for iSCSI Best Practices for connecting hosts using iSCSI. For VMware and VNX see "TechBook: Using EMC VNX Storage with VMware vSphere" - see pages 38 and 42.