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In case of a Combo port, only one interface (either the optical port or the electrical port) is active at a
time. That is, once the optical port is active, the electrical port will be inactive automatically, and vice
versa.
Basic Ethernet Interface Configuration
Configuring an Ethernet interface
Three types of duplex modes are available to Ethernet interfaces:
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 interface by using the speed command
with the auto keyword specified, the transmission rate is determined through auto-negotiation too. For a
Gigabit Ethernet interface, 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 interface:
To do… Use the command… Remarks
Enter system view
system-view
—
Enter Ethernet
interface 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 Combo port
does not support the half keyword.
Set the transmission
rate
speed { 10 | 100 | 1000 | auto }
Optional
The optical interface of a Combo port
does not support the 10 or 100 keyword.
By default, the port speed is in the
auto-negotiation mode.
Shut down the
Ethernet interface
shutdown
Optional
By default, an Ethernet interface is in up
state.
To bring up an Ethernet interface, use the
undo shutdown command.
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