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CLI-based Configuration Guide - Ethernet Switching

AR650, AR1600, and AR6100 V300R003

This document describes how to configure the components for LAN services, including link aggregation groups, VLANs, voice VLANs, MAC address tables, transparent bridging, as well as GVRP, STP/RSTP, and MSTP protocols.
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Setting the RSTP Network Diameter

Setting the RSTP Network Diameter


Any two terminals on a switching network are connected through a specific path along multiple devices. The network diameter is the maximum number of devices between any two terminals. A larger network diameter indicates a larger network scale.

An improper network diameter may cause slow network convergence and affect communication. Run the stp bridge-diameter command to set an appropriate network diameter based on the network scale, which helps speed up convergence.

It is recommended that all devices be configured with the same network diameter.


  1. Run system-view

    The system view is displayed.

  2. Run stp bridge-diameter diameter

    The network diameter is configured.

    By default, the network diameter is 7.

    • RSTP uses a single spanning tree instance on the entire network. As a result, performance deterioration cannot be prevented when the network scale grows. Therefore, the network diameter cannot be larger than 7.

    • It is recommended that you run the stp bridge-diameter diameter command to set the network diameter. Then, the switching device calculates the optimal Forward Delay timer value, Hello timer value, and Max Age timer value based on the configured network diameter.

Updated: 2019-04-12

Document ID: EDOC1100041791

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