No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

Configuration Guide - Interface Management

S7700 and S9700 V200R010C00

This document describes the principles and configurations of interfaces and provides configuration examples.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Configuring the Duplex Mode

Configuring the Duplex Mode

Context

Interfaces can work in the following two duplex modes:
  • Half-duplex mode: An interface in this mode only receives or sends data at a time within a specified transmission distance.
  • Full-duplex mode: An interface in this mode receives and sends data at the same time. The maximum throughput in full-duplex mode is double that in half-duplex mode, and the transmission distance is not limited.

You can configure the duplex mode of an Ethernet electrical interface working in either auto-negotiation or non-auto-negotiation mode.

  • In auto-negotiation mode, interfaces at both ends of a link negotiate the duplex mode. If the negotiated duplex mode is not the required value, you can manually set the duplex mode.
    • If service traffic volume of enterprise users is high, interfaces at both ends of a link must work in full-duplex mode. Otherwise, packet loss occurs. You can run the auto duplex full command to set the duplex mode to full-duplex. After the auto-negotiation succeeds, the interfaces work in full-duplex mode.
    • If service traffic volume of enterprise users is low, interfaces at both ends of a link can meet data transmission requirements when they work in half-duplex mode. You can run the auto duplex half command to set the duplex mode to half-duplex. After the auto-negotiation succeeds, the interfaces work in half-duplex mode.
  • If the remote device does not support auto-negotiation, you can manually set the duplex mode for the local interface in non-auto-negotiation mode to ensure that the local interface works in the same duplex mode as the remote interface.
NOTE:

For details about the duplex mode supported by Ethernet interfaces, see Licensing Requirements and Limitations for Ethernet Interfaces.

Interfaces at both ends of a link must use the same duplex mode. If two connected electrical interfaces use different auto-negotiation modes, the interfaces work in half-duplex mode after the negotiation and will fail to exchange packets properly.

X series cards do not support the half duplex mode.

Procedure

  • Configuring the duplex mode for an interface in auto-negotiation mode
    1. Run:
      system-view

      The system view is displayed.

    2. Run:
      interface interface-type interface-number

      The Ethernet interface view is displayed.

    3. Run:
      negotiation auto

      The Ethernet interface is configured to work in auto-negotiation mode.

    4. Run:
      auto duplex { full | half }*

      The duplex mode is set for the Ethernet interface.

    By default, an Ethernet interface negotiates the duplex mode with the remote interface.

  • Configuring the duplex mode for an interface in non-auto-negotiation mode
    1. Run:
      system-view

      The system view is displayed.

    2. Run:
      interface interface-type interface-number

      The Ethernet interface view is displayed.

    3. Run:
      undo negotiation auto

      The Ethernet interface is configured to work in non-auto-negotiation mode.

    4. Run:
      duplex { full | half }

      The duplex mode is set for the Ethernet interface.

    By default, the duplex mode of an Ethernet interface is full-duplex.

Checking the Configuration

Run the display interface [ interface-type [ interface-number ] ] command in any view or the display this interface command in the interface view to check the current interface status. Check the Duplex field in the command output.

Translation
Download
Updated: 2019-04-18

Document ID: EDOC1000141901

Views: 18709

Downloads: 79

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next