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AR500, AR510, and AR530 V200R007 CLI-based Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring transparent bridge, MAC table, link aggregation, VLANs, STP/RSTP/MSTP, and so on.The document provides the configuration procedures and configuration examples to illustrate the service configuration methods and application scenario.
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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 a Proposal/Agreement Mechanism

Configuring a Proposal/Agreement Mechanism

Context

The rapid transition mechanism is also called the Proposal/Agreement mechanism. All switching devices support the following modes:

  • Enhanced mode: The current interface counts the root port calculation when it computes the synchronization flag bit.
    • An upstream device sends a Proposal message to a downstream device, requesting rapid status transition. After receiving the message, the downstream device sets the port connected to the upstream device as a root port and blocks all non-edge ports.

    • The upstream device then sends an Agreement message to the downstream device. After the downstream device receives the message, the root port transitions to the Forwarding state.

    • The downstream device responds to the Proposal message with an Agreement message. After receiving the message, the upstream device sets the port connected to the downstream device as a designated port, and the designated port transitions to the Forwarding state.

  • Common mode: The current interface ignores the root port when it computes the synchronization flag bit.
    • An upstream device sends a Proposal message to a downstream device, requesting rapid status transition. After receiving the message, the downstream device sets the port connected to the upstream device as a root port and blocks all non-edge ports. The root port then transitions to the Forwarding state.

    • The downstream device responds to the Proposal message with an Agreement message. After receiving the message, the upstream device sets the port connected to the downstream device as a designated port. The designated port then transitions to the Forwarding state.

When Huawei devices are connected to non-Huawei devices, select the same mode as that used on non-Huawei devices.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    interface interface-type interface-number

    The Ethernet interface view is displayed.

  3. Run:

    stp no-agreement-check

    The common rapid transition mechanism is configured.

    By default, the interface uses the enhanced rapid transition mechanism.

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Updated: 2019-05-25

Document ID: EDOC1000097279

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