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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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Enabling Port Bridge

Enabling Port Bridge

Context

By default, an interface does not forward packets whose source and destination MAC addresses are the same. When the interface receives this kind of a packet, it discards the packet as an invalid packet.

After the port bridge function is enabled on the interface, the interface can forward the packet if the destination MAC address of the packet is in the MAC address table.

The port bridge function is used in the following scenarios:

  • The switch connects to devices that do not support Layer 2 forwarding. When users connected to the devices need to communicate, the devices send packets of the users to the switch for packet forwarding. Because source and destination MAC addresses of the packets are the same, a port bridge needs to be enabled on the interface so that the interface can forward such packets.
  • The switch is used as an access device in a data center and is connected to servers. Each server is configured with multiple virtual machines. The virtual machines need to transmit data to each other. If servers perform data switching for virtual machines, the data switching speed and server performance are reduced. To improve the data transmission rate and server performance, enable a port bridge on the interfaces connected to the servers so that the switch forwards data packets between the virtual machines.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    interface interface-type interface-number

    The interface view is displayed.

  3. Run:

    port bridge enable

    The port bridge function is enabled on the interface.

    By default, the port bridge function is disabled on an interface.

Checking the Configuration

Run the display current-configuration command to check whether the port bridge function is enabled.

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Updated: 2019-08-21

Document ID: EDOC1000142081

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