Hi,  max 12 ports per SP - 2 builtin, 2 CNA and 2x4 via SLIC max IP's per port should be the max number of VLANs which is 32  see the Unity ESSM on elabnavigator.emc.com for more details.
What is the maximum number of iSCSI Interface per Unity? And What is the maximum number of iSCSI IP`per Port?
Maximum number of iscsi interface