Dual Lan Configuration - NEC Express5800 Series User Manual

3-22 Windows Setup and Operation

DUAL LAN CONFIGURATION

The NEC Express5800/320Fc series builds a dual LAN configuration by using "Stratus emb-EB
2-Port Gigabit Adapter," mounted as standard on the CPU/IO module and "Intel(R) PRO/1000 MT
Server Adapter" and "Intel(R) PRO/1000 MF Server Adapter" inserted in the extended PCI slots.
Overview
The dual LAN configuration is of two types as described below:
Adapter Fault Tolerance (AFT)
Adapter Fault Tolerance (AFT) is a feature that places more than one LAN controller on the
same LAN (same segment), and automatically switches the process of the primary controller to
the backup controller when any trouble occurred on the primary.
Adaptive Load Balancing (ALB)
Adaptive Load Balancing (ALB) is a feature that connects more than one LAN controller to the
same hub and enhances the throughput by operating packet transmission from the server.
Receive Load Balancing (RLB) is enabled by default. When RLB is enabled, the receiving
throughput is enhanced.
The other modes, "Static Link Aggregation" and "IEEE 802.3ad Link Aggregation," do not
contribute to enhancement against a fault. When a fault occurs, the communication performed on
the controller with the fault is not taken over by the backup controller but lost.