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Configuration Guide - Ethernet Switching

CloudEngine 8800, 7800, 6800, and 5800 V200R003C00

This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, MUX VLAN, Voice VLAN, VLAN mapping, QinQ, GVRP, VCMP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, and Layer 2 protocol transparent transmission.
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(Optional) Configuring a Priority for a Switching Device in an MSTI

(Optional) Configuring a Priority for a Switching Device in an MSTI


In an MSTI, there is only one root bridge, which is the logical center of the MSTI. The root bridge should be a high-performance switching device; 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 switching devices, and set a high priority for high-performance switching devices. A smaller priority value indicates a higher priority.


  1. Run system-view

    The system view is displayed.

  2. Run stp [ instance instance-id ] priority priority

    A priority is set for the switching device in an MSTI.

    The default priority value of the switching device is 32768.

    If instance-id is not specified, a priority is set for the switching device 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.

  3. Run commit

    The configuration is committed.

Updated: 2019-05-08

Document ID: EDOC1100004351

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