R211x-HP Flexfabric 11900 Layer 2 - LAN Switching Configuration Guide

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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 52 DCBX application scenario
DCBX enables lossless packet transmission on DCE networks.
As shown in Figure 52, DCBX a
pplies to an FCoE based data center network, and operates on an access
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 Application Protocol (APP), Enhanced
Transmission Selection (ETS), and PFC in DCBX Rev 1.00 and DCBX Rev 1.01, and including ETS
Configuration, ETS Recommendation, PFC, and APP in IEEE Std 802.1Qaz™-2011.
HP devices can send the these types of DCBX information to a server adapter supporting FCoE, but they
cannot receive them.
DCBX configuration task list
Tasks at a
g
lance
(Required.)
Enabling LLDP and DCBX TLV advertising
(Required.)
Configuring APP parameters
(Optional.) Configuring ETS parameters:
• Configuring the 802.1p-to-local priority mapping
• Configuring group-based WRR queuing
(Required.)
Configuring PFC parameters
Enabling LLDP and DCBX TLV advertising
To enable the device to advertise APP, ETS, and PFC data through an interface, enable LLDP globally and
enable LLDP and DCBX TLV advertising on the interface.