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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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Configuring TC Protection on a Switching Device

Configuring TC Protection on a Switching Device


If attackers forge TC-BPDUs to attack the switching device, the switching device receives a large number of TC BPDUs within a short time. If MAC address entries and ARP entries are deleted frequently, the switching device is heavily burdened, causing potential risks to the network.

TC protection is used to suppress TC BPDUs. The number of times that TC BPDUs are processed by a switching device within a given time period is configurable. If the number of TC BPDUs that the switching device receives within a given time exceeds the specified threshold, the switching device handles TC BPDUs only for the specified number of times. Excess TC BPDUs are processed by the switching device as a whole for once after the specified time period expires. This protects the switching device from frequently deleting MAC entries and ARP entries, therefore avoiding overburden.


  1. Run system-view

    The system view is displayed.

  2. Run stp tc-protection threshold threshold

    The number of times the MSTP process handles the received TC BPDUs and updates forwarding entries within a given time is set.


    The time is set using the stp tc-protection interval command.

Updated: 2019-04-12

Document ID: EDOC1100041791

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