Step 7: Set Duplex Lan Configuration; Overview - NEC N8800-155F User Manual

4-40 Windows Setup

Step 7: Set Duplex LAN Configuration

The NEC Express5800/ft series builds a duplex LAN configuration by using "Stratus emb-82576
2-Port Gigabit Adapter" mounted as standard on the CPU/IO module and the extended PCI slot
"Stratus 82576 2-Port Copper Gigabit Adapter.".

Overview

The duplex LAN configuration types are 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. Disable RLB. When RLB is enabled,
the network duplex configuration may fail.
Switch Fault Tolerance (SFT)
Switch Fault Tolerance is a feature that provides the network availability as the failover target
(standby) adapter takes over MAC address and L3 address by connecting each two adapters to
each two switches when a problem occurs on the adapter, cable or connecting target. One is
assigned to the primary adapter and the other is to the standby. The primary adapter
communicates on the network.
Regarding the path redundancy, you need to construct the environment by using the spanning
tree not only on the server side but also on the switch side.
You need to set the priority of the switch so that the path through the primary adapter is
available even when a switch on the path is broken and the path information is updated.