Configuring Dcbx - HP FlexFabric 12900 Series Configuration Manual

Configuring 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 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-201 1 (Media Access Control (MAC) Bridges and Virtual Bridged Local Area
•
Networks-Amendment 18: Enhanced Transmission Selection for Bandwidth Sharing Between Traffic
Classes).
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:
HP devices support only the remote configuration function.
Figure 58 DCBX application scenario
DCBX enables lossless packet transmission on DCE networks.
As shown in
switch. DCBX enables the switch to control the server 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:
•
Application Protocol (APP).
Enhanced Transmission Selection (ETS).
Priority-based Flow Control (PFC).
In IEEE Std 802.1Qaz-201 1:
•
ETS Configuration.
ETS Recommendation.
PFC.
Figure 58, DCBX applies to an FCoE-based data center network, and operates on an access
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