Each Oracle MaxRep Replication Engine ships with two HBAs. Oracle recommends using a separate, redundant, SAN fabric for each HBA.
The supported SAN fabric zoning is to zone each HBA port and each NPIV port to each of the Oracle FS System Controller ports.
Supported configurations is to connect all ports from the first HBA to one SAN fabric, and all ports from the second HBA connected to a separate SAN fabric.