[ Thanks to Falko
Timme for this link. ]
“Each Openfiler appliance will have two NICs: one for
communicating with the LAN, the other for communicating with the
other SAN (via direct cable). The first will be used for
administration, to communicate directly with each node. A third
“virtual” interface is used by the heartbeat service and is what
will be used by computers on the LAN.”