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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.
Follow these steps to configure an Ethernet interface:
To do...
Enter system view
Enter Ethernet
interface view
Set the description
string
Set the duplex mode
Set the transmission
rate
Shut down the
Ethernet interface
10-Gigabit Ethernet ports do not support the duplex command or the speed command.
Configuring Flow Control on an Ethernet Interface
When flow control is enabled on both sides, if traffic congestion occurs at the ingress interface, it will
send a Pause frame notifying the egress interface to temporarily suspend the sending of packets. The
egress interface is expected to stop sending any new packet when it receives the Pause frame. In this
way, flow control helps to avoid dropping of packets. Note that this will be possible only after flow control
is enabled on both the ingress and egress interfaces.
Use the command...
system-view
interface interface-type
interface-number
description text
duplex { auto | full | half }
speed { 10 | 100 | 1000 | auto }
shutdown
1-2
Remarks
—
—
Optional
By default, the description of an interface
is the interface name followed by the
"interface" string, GigabitEthernet1/0/1
Interface for example.
Optional
auto by default.
The optical interface of a Combo port
does not support the half keyword.
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.
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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