Our customer is willing to deploy a SuSE Linux version 11 SP4 Cluster solution made of 2 hosts, but each host will use a different protocol to reach the same shared NetApp LUN (Host-1 using iSCSI, Host-2 using FCP).
Questions are: is it officially supported by NetApp (I see the iGroup mixed mode, but not sure for this purpose)? Is there any documentation from NetApp side mentioning this? Or this must be checked with Host O.S. provider?
I think as long as this (mixed protocol) configuration is for a Clustered Host file-system (As in your case SuSe Linux Cluster) then it should be absolutely fine. If you wish you can raise a ticket with NetApp just to get more clarity around it.
Only conformance that I will check is for - SuSe linux compatibility with ONTAP in the Interoperability matrix, along with FC HBAs supported list and their firmware for the given ONTAP version.