HP LH4r HP Netserver 10/100TX PCI LAN Adapter Guide - Page 31
Selecting Duplex Mode, Optional
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7 Selecting Duplex Mode (Optional) Duplexing is a performance option that lets you choose how the adapter sends and receives data packets over the network. The adapter can operate at full duplex only when connected to a full duplex 10BASE-T or 100BASE-TX switch, or to another full duplex adapter. The possible settings for duplexing are: • Auto (requires a full duplex adapter or switch with auto-negotiation capability). The adapter negotiates with the switch to send and receive packets at the highest rate. This is the default setting. If the switch does not provide auto-negotiation, the adapter runs at half duplex. • Full duplex (requires a full duplex switch or adapter). The adapter can send and receive packets at the same time. This mode can increase adapter performance capability. If the full duplex switch provides auto-negotiation, the adapter runs at full duplex. If the full duplex switch does not provide auto-negotiation, you need to set the adapter duplex mode manually (see the following sections), because it defaults to half duplex. • Half duplex. The adapter performs one operation at a time; it either sends or receives. NOTE If an adapter is running at 100 Mbps and half-duplex, your potential bandwidth is higher than if you run it at 10 Mbps and full duplex. 23