No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


S12700 V200R012C00 Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, VLAN aggregation, MUX VLAN, VLAN termination, Voice VLAN, VLAN mapping, QinQ, GVRP, VCMP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, and Layer 2 protocol transparent transmission.
Rate and give feedback:
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).
Enabling MSTP

Enabling MSTP


After MSTP multi-process is enabled on the switch, you must enable MSTP in the MSTP process view so that the MSTP configuration can take effect in the MSTP process.

Enabling MSTP on a ring network immediately triggers spanning tree calculation on the network. If basic configurations are not performed on switching devices and interfaces before MSTP is enabled, network flapping may occur upon changes to parameters such as device priority and interface priority.


  1. Run system-view

    The system view is displayed.

  2. Run stp process process-id

    The view of the created MSTP process is displayed.

  3. Run stp enable

    MSTP is enabled on the MSTP process of the device.

    By default, the MSTP function is enabled on the device.

Follow-up Procedure

If the topology of a spanning tree changes, the forwarding paths to associated VLANs are changed. On the switch, therefore, the ARP entries corresponding to these VLANs need to be updated. MSTP processes ARP entries in either fast or normal mode.

  • In fast mode, ARP entries to be updated are directly deleted.

  • In normal mode, ARP entries to be updated are rapidly aged.

    The remaining lifetime of ARP entries to be updated is set to 0. The switch rapidly processes these aged entries. If the number of ARP aging probe attempts is not set to 0, ARP implements aging probe for these ARP entries.

    In either fast or normal mode, MAC entries are directly deleted.

To specify which mode is used for STP/RSTP convergence, run the stp converge { fast | normal } command in the system view.

By default, the normal MSTP convergence mode is used.

If fast mode is used, ARP entries are frequently deleted. This causes high CPU usage on the MPU and LPU (reaching 100%) and results in frequent network flapping. Therefore, using normal mode is recommended.

Updated: 2019-01-18

Document ID: EDOC1100038103

Views: 125364

Downloads: 52

Average rating:
This Document Applies to these Products
Related Version
Related Documents
Previous Next