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Configuration Guide - DCN and Server Management

CloudEngine 8800, 7800, 6800, and 5800 V200R003C00

This document describes the configurations of Trill, FCoE, DCB, and NLB Server Cluster Association.
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Configuring DCBX

Configuring DCBX


Data Center Bridging (DCB) allows DCB devices at both ends of a link to discover and exchange DCB configurations.

Data Center Bridging eXchange protocol (DCBX) encapsulates DCB configurations into a Link Layer Discovery Protocol (LLDP) Type, Length, and Value (TLV) so that devices at both ends of a Fibre Channel over Ethernet (FCoE) virtual link can exchange DCB configurations.

When the device connects to a non-Huawei device, the service priorities in the APP TLVs must be the same.

Pre-configuration Tasks

Before configuring Data Center Bridging eXchange protocol (DCBX), complete the following task:

Configuring a link layer protocol so that interfaces at both ends of a link are Up.


  1. Run system-view

    The system view is displayed.

  2. Run lldp enable

    The Link Layer Discovery Protocol (LLDP) is enabled globally.

  3. Run interface interface-type interface-number

    The interface view is displayed.

  4. Run lldp tlv-enable dcbx

    The interface is configured to advertise DCBX TLVs.

  5. (Optional) Run dcb compliance intel-oui

    The version number in the outgoing DCBX TLV is set.

    Two standards are available for the DCBX protocol: IEEE DCBX and Intel DCBX.

    By default, an interface sends DCBX TLVs of the IEEE standard version.

  6. Run quit

    Exit from the interface view.

  7. (Optional) Run dcb app-profile profile-name

    An APP profile is created and the APP profile view is displayed.

    By default, no APP profile is configured.

  8. (Optional) Run application { fcoe | fip | iscsi | ethtype ethtype | [ tcp | udp ] port port-id } priority priority-value

    A service priority in the APP TLV of DCB packets is set.

    By default, the priorities of Fibre Channel over Ethernet (FCoE) and Fibre channel Initialization Protocol (FIP) services are both 3, and the ISCSI service priority is 4.


    PFC must be enabled for queues with a priority; otherwise, DCB negotiation may fail.

  9. (Optional) Run quit

    Exit from the APP profile view.

  10. (Optional) Run interface interface-type interface-number

    The view of the interface to which the APP profile needs to be applied is displayed.

  11. (Optional) Run dcb app-profile enable app-profile-name

    The APP profile is applied to the interface.

    By default, no APP profile is applied to an interface.

  12. Run commit

    The configuration is committed.

Verifying the Configuration

  • Run the display lldp tlv-config [ interface interface-type interface-number ] command to check TLV types supported by the system or an interface.

  • Run the display dcb app-profile [ profile-name ] command to check the APP profile configuration.

Updated: 2019-05-08

Document ID: EDOC1100004349

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