In case of an uplink failure, server vHBAs are re-pinned to the remaining uplinks of the same Fabric Interconnect. In case of a complete Fabric Interconnect failure, the operating system (Windows, Linux, or hypervisors) relies on its multipath drives (such as MPIO and EMC PowerPath) to re-route I/O for the failed path. If the operating system configuration is missing, FC communication will fail until one FC uplink is restored on the failed Fabric Interconnect.

This behavior is different from the Ethernet automatic re-pinning and is in accordance with the design goals of SAN connectivity.