NEC Express5800 series User Manual page 137

Setting up the Adapter Fault Tolerance (AFT)/Adaptive Load Balancing (ALB)
Adapter Fault Tolerance (AFT) is a feature that creates a group containing more than one adapter.
With this feature, when an adapter being used encounters any problem, the process on it is
automatically transferred to the other adapter in the group.
Adaptive Load Balancing (ALB) is a feature that creates a group containing more than one adapter
and enhances the throughput by operating packet transmission from the server by all the adapters.
This feature includes AFT feature.
IMPORTANT:
AFT/ALB setup must be operated after installing the drivers and
restarting the system.
The adapters specified as a group of Adapter Fault Tolerance
(AFT) can work, whether they are connected to same Hub or
separated Hubs. But if they are connected to separated Hubs, those
Hubs must exist on the same LAN (Segment). Therefore, set the
connection as a cascade connection.
The adapters specified as a group of Adaptive Load Balancing
(ALB) can be connected only via a Switching Hub.
If you want to benefit from the AFT/ALB feature, follow the procedure below to set it up.
Installing the Operating System 5-27