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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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Configuring BPDU Protection on the Switch

Configuring BPDU Protection on the Switch

Context

Edge ports are directly connected to user terminals and will not receive BPDUs. If a switch is attacked by bogus BPDUs, edge ports will receive these BPDUs. The switch then sets the edge ports as non-edge ports and recalculates the spanning tree, resulting in network flapping.

BPDU protection can be used to protect the switch against malicious attacks. After BPDU protection is enabled on the switch, the switch shuts down an edge port if the edge port receives a BPDU.

Perform the following operations on the switch configured with an edge port.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    stp bpdu-protection

    BPDU protection is enabled on the switch.

    By default, BPDU protection is disabled on the switch.

Follow-up Procedure

To configure a shutdown edge port to go Up automatically, run the error-down auto-recovery cause bpdu-protection interval interval-value command in the system view to configure the automatic recovery function and set the recovery delay. After the delay expires, the port automatically goes Up. Note the following when setting interval interval-value:
  • A smaller value indicates a shorter delay for the port to go Up automatically and a higher frequency at which the port alternates between Up and Down states.
  • A larger value indicates a longer delay for the port to go Up automatically and longer traffic interruption.
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Updated: 2019-08-21

Document ID: EDOC1000142081

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