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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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(Optional) Configuring a Priority for a Switch in an MSTI

(Optional) Configuring a Priority for a Switch in an MSTI


In an MSTI, there can be only one root bridge, which is the logical center of the MSTI. The root bridge should be a high-performance switch; however, the priority of such a device may not be the highest on the network. To ensure that such a device is selected as the root bridge, set a low priority for low-performance switches, and set a high priority for high-performance switches. A smaller priority value indicates a higher priority.


  1. Run:


    The system view is displayed.

  2. Run:

    stp [ instance instance-id ] priority priority

    A priority is set for the switch in an MSTI.

    The default priority value of the switch is 32768.

    If instance-id is not specified, a priority is set for the switch in MSTI 0.


    If the stp [ instance instance-id ] root primary or stp [ instance instance-id ] root secondary command has been executed to configure the device as the root bridge or secondary root bridge, to change the device priority, run the undo stp [ instance instance-id ] root command to disable the root bridge or secondary root bridge function and run the stp [ instance instance-id ] priority priority command to set a priority.

Updated: 2019-08-21

Document ID: EDOC1000142081

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