dcb-dcbx - Linux

Overview

dcb-dcbx enables the configuration of Data Center Bridging (DCB) Data Center Bridging Exchange (DCBX) features for DCB-compliant network interface controllers (NICs). DCB is a set of IEEE 802.1Q standards that enhance network performance and efficiency in data centers.

Syntax

dcb-dcbx [options] interface

Options/Flags

-e, –enable: Enable DCBX on the specified interface.
-d, –disable: Disable DCBX on the specified interface.
-s, –status: Show the status of DCBX on the specified interface.
-E, –enable-feature: Enable the specified DCBX feature. Available features are:
- Priority Groups (PG)
- Bandwidth Allocation (ETS)
- Congestion Notification (CN)
- Enhanced Transmission Selection (ETS)
-D, –disable-feature: Disable the specified DCBX feature.
-c, –cnp-p: Set the CNP priority for the specified interface.
-a, –aggregated-bw: Set the aggregated bandwidth for ETS in Mbps.
-m, –max-bw: Set the maximum bandwidth for a priority group in Mbps.
-i, –interface: Specify the network interface to configure.
-v, –verbose: Enable verbose output.
-h, –help: Print usage help.

Examples

Enable DCBX on an interface:

dcb-dcbx -e eth0

Disable DCBX on an interface:

dcb-dcbx -d eth0

Show DCBX status on an interface:

dcb-dcbx -s eth0

Enable ETS feature on an interface:

dcb-dcbx -E ETS eth0

Disable PG feature on an interface:

dcb-dcbx -D PG eth0

Common Issues

Ensure the network interface supports DCB before using this command.
Some features may not be supported on all network adapters.
Incorrect configuration can lead to performance issues.

Integration

dcb-dcbx can be combined with other Linux commands and tools, such as:

ifconfig: To view network interface settings.
ethtool: To configure low-level NIC features.
tc: To configure traffic control rules.