3Com 10014298 Setting Duplex Attribute of the Ethernet Port, Setting Cable Type for Ethernet Port

Ethernet Port Overview 37

Setting Duplex Attribute of the Ethernet Port

Set the port to full duplex to send and receive data packets at the same time. Set the port to half-duplex to either send or receive only. If the port has been set to auto-negotiation mode, the local and peer ports will automatically negotiate the duplex mode.

Perform the following configuration in Ethernet port view.

Table 28 Set Duplex Attribute for Ethernet Port

Operation	Command
Set duplex attribute for Ethernet port.	duplex { auto full half }
Restore the default duplex attribute of	undo duplex
Ethernet port.

The 100 Mbps TX Ethernet port can operate in full-duplex, half-duplex, or auto-negotiation mode. The Gigabit TX Ethernet port can operate in full duplex, half duplex, or auto-negotiation mode. When the port operates at 1000 Mbps, the duplex mode can be set to full (full duplex) or auto (auto-negotiation).

The optical 100M/Gigabit/10Gigabit Ethernet ports support full duplex mode and can be configured to operate in full (full duplex) or auto (auto-negotiation) mode. By default, the port is in auto (auto-negotiation) mode.

Setting the Speed of the Ethernet Port

You can use the following command to set the speed on the Ethernet port. If the speed is set to auto (auto-negotiation) mode, the local and peer ports will automatically negotiate the port speed.

Perform the following configuration in Ethernet port view.

Table 29 Set Speed on Ethernet Port

Operation	Command
Set 100M Ethernet port speed	speed {	10	100	auto	}
Set Gigabit Ethernet port speed	speed {	10	100	1000		auto }
Restore the default speed on Ethernet port	undo speed

Setting Cable Type for Ethernet Port

The Ethernet port supports the straight-through (MDI) and cross-over (MDIX) network cables. The Switch 7750 only supports auto (auto-sensing). If you set another duplex type, an error message displays. By default, the cable type is auto (auto-recognized). The system will automatically recognize the type of cable connecting to the port.

Perform the following configuration in Ethernet port view. The settings only take effect on 10/100BASE-T and 10/100/1000BASE-T ports.

Table 30 Set the Type of the Cable Connected to the Ethernet Port

Operation	Command
Set the type of the cable connected to the	mdi { auto }
Ethernet port.
Restore the default type of the cable	undo mdi
connected to the Ethernet port.