Table of Contents

Port Physical Characteristic Configuration Commands

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Table of Contents

Table of Contents

Chapter 1 Port Physical Characteristic Configuration Commands..........................................................1
1.1 Port Physical Characteristic Configuration Commands............................................................. 1

1.1.1 speed...................................................................................................................................... 1
1.1.2 duplex..................................................................................................................................... 2
1.1.3 flow-control.............................................................................................................................3

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Port Physical Characteristic Configuration Commands

Chapter 1 Port Physical Characteristic Configuration Commands

1.1 Port Physical Characteristic Configuration Commands
Configuration commands are shown as follows:

 speed

 duplex

 flow-control

1.1.1 speed

Syntax

To set the speed of the interface, ran speed {10| 100 | 1000 | auto}.

speed {10 | 100 | auto } (TX port)

speed {100 | 1000 | auto } (Optical port)

no speed

Parameters

Parameters Description

10, 100,1000 Sets the speed of an interface to 10M, 100M or 1000M.

auto Sets the speed of the interface to auto.

Default Value

The speed of the electrical interface is auto, the speed of the 100M optical interface is
100M and the speed of the 1000M optical interface is 1000M.

Usage Guidelines

This command is configured in layer-2 interface configuration mode.

Note:

The optical interface speed is fixed. The gigabit optical interface enables
auto-negotiation function by default. The optical/electric port cannot support the gigabit
and full-duplex at the same time. The ordinary TX port does not support speed 1000.

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Port Physical Characteristic Configuration Commands

Example

The following example shows how to set the speed of interface g0/1 to 100M.
Switch_config# interface g0/1
Switch_config_g0/1# speed 100

1.1.2 duplex

Syntax

To set the duplex mode of an interface, run duplex {auto | full | half}.

duplex {auto | full | half }

no duplex

Parameters

Parameters Description

auto Automatic negotiation

full Full duplex

half Half duplex

Default Value

The electrical interface is in automatic negotiation mode , while the optical interface is in
full duplex mode.

Usage Guidelines

This command is configured in layer-2 interface configuration mode.

Note:

The duplex mode of the optical interface is fixed, that is, the duplex mode of all optical
interfaces is the full duplex mode. The optical/electric port cannot support the gigabit
and full-duplex at the same time. There is backpressure in half-duplex mode.

Example

The following example shows how to set the interface g0/1 to the full duplex mode.
Switch_config# interface g0/1
Switch_config_g0/1# duplex full

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Port Physical Characteristic Configuration Commands

1.1.3 flow-control

Syntax

To configure flow control for an interface, run the following command.

flow-control { on | off | auto}

Parameters

Parameters Description

on Enables the flow control.

off Disables the flow control.

auto Auto-negotiation Mode

Default Value

The flow control function is disabled by default.

Usage Guidelines

The command must be configured in L2 port configuration mode.

Note:

The difference between “flow-control auto” and “flow-control on” is in the “auto” mode
the device sends flow control frame only when it negotiates successfully with the
opposite end as the system is compelled to receive flow control frame in both modes.

Example

The following example shows how to enable the flow control function for port g0/1.
Switch_config#int g0/1
Switch_config_g0/1#flow-control on

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