I believe you're referring to the 10GigE ports on the database servers. These are ethernet ports, not fiber channel. It may be possible to access a V7000 file module using NFS over Ethernet, though I haven't actually seen it done with V7000-type storage before.
but I see in the datasheet there is 2x 10GB ethernet Ports (optical)
Yes there are 2 10GB ethernet ports.
With Exadata you can choose two copper ports or two optical ports to run you client network (aka Oracle Net) on.
During the initial Exadata deployment a bond will be configured based on your decision.
Normally no other protocol then sqlnet is allowed to run on this IP.
so you mean we sqlnet is using TCP/IP protocal.
you mean both interface can only run on IP network . ?
These are ethernet ports not SAN ports. If you want to expose SAn to an exadata you need some kind of SAN to NAS head. Many companies sell hardware that allows SAN to be exported as NAS . If you have a ZFS also you can even use that to export SAN as NAS over infiniband.