i have customer using IBM N series (similiar with Netapp FAS2020)with active/active for both controller. 2 nics at both controller is configured with VIF, seperate with 2 subnet and connected to 2 iscsi switch.
Server have 2 nic dedicated for iscsi traffic. both IP on controller is able to ping.
Just need to confirm, is there any specif configuration required in order to make MPIO work for storage. other than vif and cabling topology...