System and method for discovering Storage Area Network (SAN) fabrics and mapping switches to the fabrics. Embodiments may collect switch information from one or more sources and examine the collected switch information to determine interconnections among the switches. From this information, one or more SAN fabrics of which the switches are components may be determined, and the switches mapped to the SAN fabrics of which they are components. Embodiments may use an out-of-band protocol such as SNMP to collect switch information for all switches that can be discovered, either from individual switches or from a central switch management server, and then traverse the switch information to construct a map of how the switches are connected. From the map, one or more SAN fabrics, and which switches are connected in the same fabric(s), may be determined.