The B<-i> B<interface> is required to direct B<configfpc> to the xCAT MN interface which is on the same VLAN as the FPCs.
There are several bits of information that must be included in the xCAT database before running this command.
You must create the FPC node definitions for all FPCs being discovered including the IP address and switch port information.
The B<configfpc> command discovers the FPCs and collects the MAC address. The MAC address is used to relate the FPC to a FPC node using the switch information for this MAC. Once the relationship is discovered the FPC is configured with the FPC node IP settings.
This process is repeated until no more FPCs are discovered.