1-2Similarly, if you configure the transmission rate for an Ethernet port by using the speed command withthe auto keyword specified, the transmission rate is determined through auto-negotiation too. For aGigabit Ethernet port, you can specify the transmission rate by its auto-negotiation capacity. For details,refer to Configuring an Auto-negotiation Transmission Rate.Follow these steps to configure an Ethernet port:To do… Use the command… RemarksEnter system view system-view —Enter Ethernet portviewinterface interface-typeinterface-number —Set the descriptionstring description textOptionalBy default, the description of a port is theport name followed by the “Interface”string, GigabitEthernet1/0/1 Interfacefor example.Set the duplex mode duplex { auto | full | half }Optionalauto by default.The optical port of an SFP port and theelectrical port of an Ethernet port whoseport rate is configured as 1000 Mbps donot support the half keyword.Set the transmissionrate speed { 10 | 100 | 1000 | auto }OptionalThe optical port of an SFP port does notsupport the 10 or 100 keyword.By default, the port speed is in theauto-negotiation mode.Shut down theEthernet port shutdownOptionalBy default, an Ethernet port is in up state.To bring up an Ethernet port, use theundo shutdown command.10-Gigabit Ethernet ports do not support the duplex command or the speed command.Configuring an Auto-negotiation Transmission RateUsually, the transmission rate on an Ethernet port is determined through negotiation with the peer end,which can be any rate within the capacity range. With auto-negotiation rate configured, you can enablethe Ethernet port to negotiate only part of the transmission rates within its capacity.
