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Configuration Guide - Ethernet Switching

CloudEngine 8800, 7800, 6800, and 5800 V200R003C00

This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, MUX VLAN, Voice VLAN, VLAN mapping, QinQ, GVRP, VCMP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, and Layer 2 protocol transparent transmission.
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Configuring Transparent Transmission of Protocol Packets in a VLAN to Improve Forwarding Efficiency

Configuring Transparent Transmission of Protocol Packets in a VLAN to Improve Forwarding Efficiency

VLAN transparent transport improves forwarding efficiency. A switch directly forwards protocol packets of a specific VLAN without sending the packets to its CPU.

Context

If the device is a gateway of some VLANs or snooping functions are deployed in some VLANs, the device does not need to process protocol packets in other VLANs. After the protocol packets in other VLANs are sent to the CPU, the CPU needs to forward them to other devices. This mechanism is called software forwarding. Software forwarding affects the forwarding speed and efficiency of protocol packets because protocol packets need to be processed.

To address this issue, deploy transparent transmission of protocol packets in VLANs where protocol packets do not need to be processed. This function enables the device to transparently transmit the protocol packets in the VLANs to other devices, which improves the forwarding speed and efficiency.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run vlan vlan-id

    The VLAN view is displayed.

    NOTE:

    If a device is configured with multiple VLANs, configuring names for these VLANs is recommended:

    Run the name vlan-name command in the VLAN view. After a VLAN name is configured, you can run the vlan vlan-name vlan-name command in the system view to enter the corresponding VLAN view.

  3. Run protocol-transparent

    Transparent transmission of protocol packets in a VLAN is enabled.

    By default, transparent transmission of protocol packets in a VLAN is disabled.

    Transparent transmission of protocol packets cannot be configured in VLAN 1.

    NOTE:

    A VLAN enabled with transparent transmission of protocol packets cannot be configured as a multicast VLAN or MUX VLAN.

  4. Run commit

    The configuration is committed.

Verifying the Configuration

Run the display this command in the VLAN view to check the configuration for transparent transmission of protocol packets in a VLAN.

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Updated: 2019-05-08

Document ID: EDOC1100004351

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