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S12700 V200R010C00 Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring link aggregation, VLANs, Voice VLAN, VLAN mapping, QinQ, GVRP, MAC table, STP/RSTP/MSTP, SEP, and so on.
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Setting Parameters for Interoperation Between Huawei and Non-Huawei Devices

Setting Parameters for Interoperation Between Huawei and Non-Huawei Devices

To implement interoperation between a Huawei device and a non-Huawei device, select a fast transition mode according to the Proposal/Agreement mechanism of the non-Huawei device.

Context

A switching device supports the following Proposal/Agreement modes:

  • Enhanced mode: The device determines the root port when it calculates the synchronization flag bit.
    1. An upstream device sends a Proposal message to a downstream device to request a fast state transition. After receiving the message, the downstream device sets the port connected to the upstream device as the root port and blocks all non-edge ports.

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

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

  • Common mode: The device ignores the root port when it calculates the synchronization flag bit.
    1. An upstream device sends a Proposal message to a downstream device to request a fast state transition. After receiving the message, the downstream device sets the port connected to the upstream device as the root port and blocks all non-edge ports. Then, the root port transitions to the Forwarding state.

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

On an STP network, if a Huawei switching device is connected to a non-Huawei device that uses a different Proposal/Agreement mechanism, the two devices may not be able to interoperate. Select the mode that matches the Proposal/Agreement mechanism of the non-Huawei device.

Pre-configuration Tasks

Before setting parameters for interoperation between Huawei and non-Huawei devices, configure basic STP/RSTP functions.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    interface interface-type interface-number

    The view of an interface participating in spanning tree calculation is displayed.

  3. Run:

    stp no-agreement-check

    The common fast transition mode is specified.

    By default, the enhanced fast transition mode is used on a port.

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Updated: 2019-08-21

Document ID: EDOC1000142081

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