H3C S5120-SI Series

1-1
1 Ethernet port Configuration
When configuring Ethernet ports, go to these sections for information you are interested in:
z General Ethernet port Configuration
z Displaying and Maintaining an
General Ethernet port Configuration
Basic Ethernet port Configuration
Configuring an Ethernet port
Three types of duplex modes are available to Ethernet ports:
z Full-duplex mode (full). Interfaces operating in this mode can send and receive packets
simultaneously.
z Half-duplex mode (half). Interfaces operating in this mode can either send or receive packets at a
given time.
z Auto-negotiation mode (auto). Interfaces operating in this mode determine their duplex mode
through auto-negotiation.
Similarly, if you configure the transmission rate for an Ethernet port by using the speed command with
the auto keyword specified, the transmission rate is determined through auto-negotiation too. For a
Gigabit Layer 2 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… Remarks
Enter system view
system-view
—
Enter Ethernet port view
interface interface-type
interface-number
—
Set the description string
description text
Optional
By default, the description of an
interface is the interface name
followed by the “interface” string,
GigabitEthernet1/0/1 Interface
for example.
Set the duplex mode duplex { auto | full | half }
Optional
auto by default.
The optical interface of a SFP port
does not support the half
keyword.