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Configuration Guide - Ethernet Switching

S7700 and S9700 V200R012C00

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, HVRP, and Layer 2 protocol transparent transmission.
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Configuring a Port as an Edge Port and BPDU Filter Port

Configuring a Port as an Edge Port and BPDU Filter Port

Context

If a designated port is located at the edge of a network and is directly connected to terminals, this port is called edge port. The switch does not learn whether a port is directly connected to terminals, the port needs to be manually configured as an edge port.

An edge port does not receive or process configuration BPDUs, or participate in VBST calculation. It can transit from Disable to Forwarding without any delay to implement fast convergence.

After a designated port is configured as an edge port, the port can still send BPDUs. Then BPDUs are sent to other networks, causing flapping of other networks. You can configure a port as an edge port and BPDU filter port so that the port does not process or send BPDUs.

  • After all ports are configured as edge ports and BPDU filter ports in the system view, none of ports on the switch send BPDUs or negotiate the VBST status with directly connected ports on the peer device. All ports are in forwarding state. This may cause loops on the network, leading to broadcast storms. Exercise caution when you configure a port as an edge port and BPDU filter port.

  • After a port is configured as an edge port and BPDU filter port in the interface view, the port does not process or send BPDUs. The port cannot negotiate the VBST status with the directly connected port on the peer device. Exercise caution when you configure a port as an edge port and BPDU filter port.

Procedure

  • Configuring all ports as edge ports and BPDU filter ports in the system view
    1. Run system-view

      The system view is displayed.

    2. Run stp edged-port default

      All ports are configured as edge ports.

      By default, a port is a non-edge port.

    3. Run stp bpdu-filter default

      All ports are configured as BPDU filter ports.

      By default, a port is a non-BPDU-filter port.

  • Configuring a port as an edge port and BPDU filter port in the interface view
    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number

      The view of the Ethernet interface that participates in spanning tree calculation is displayed.

    3. Run stp edged-port enable

      The port is configured as an edge port.

      By default, a port is a non-edge port.

    4. Run stp bpdu-filter enable

      The port is configured as a BPDU filter port.

      By default, a port is a non-BPDU-filter port.

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Updated: 2019-01-18

Document ID: EDOC1100038843

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