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Configuring DCBX
About DCBX
Data Center Ethernet (DCE), also known as Converged Enhanced Ethernet (CEE), is enhancement
and expansion of traditional Ethernet local area networks for use in data centers. DCE uses the Data
Center Bridging Exchange Protocol (DCBX) to negotiate and remotely configure the bridge capability
of network elements.
DCBX versions
DCBX has the following self-adaptable versions:
• DCB Capability Exchange Protocol Specification Rev 1.00.
• DCB Capability Exchange Protocol Base Specification Rev 1.01.
• IEEE Std 802.1Qaz-2011 (Media Access Control (MAC) Bridges and Virtual Bridged Local Area
Networks-Amendment 18: Enhanced Transmission Selection for Bandwidth Sharing Between
Traffic Classes).
DCBX functions
DCBX offers the following functions:
• Discovers the peer devices' capabilities and determines whether devices at both ends support
these capabilities.
• Detects configuration errors on peer devices.
• Remotely configures the peer device if the peer device accepts the configuration.
NOTE:
H3C devices support only the remote configuration feature.
DCBX application scenario
Figure 7 DCBX application scenario
DCBX enables lossless packet transmission on DCE networks.
As shown in Figure 7, DCBX applies to
an FCoE-based data center network, and operates on an
access switch. DCBX enables the switch to control the server or storage adapter, and simplifies the
configuration and guarantees configuration consistency. DCBX extends LLDP by using the IEEE
802.1 organizationally specific TLVs (DCBX TLVs) to transmit DCBX data, including:
• In DCBX Rev 1.00 and DCBX Rev 1.01:
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