dcb-app - Linux
Overview
dcb-app
is a command-line tool for inspecting, configuring, and managing DCB (Data Center Bridging) capabilities on a network interface. It enables administrators to monitor and manipulate traffic shaping and prioritization settings to optimize network performance in data centers.
Syntax
dcb-app [options] <interface> <command> [args]
Options/Flags
- -s, –silent: Suppress all output except errors
- -v, –verbose: Increase verbosity level
- -h, –help: Display help and usage information
Commands
config
- show: Display current DCB configuration
- set: Set DCB configuration options
stats
- show: Display DCB statistics
- clear: Clear DCB statistics
pfcs
- set: Set PFC (Priority-based Flow Control) configuration
- clear: Clear PFC configuration
ieee
- get: Get IEEE 802.1Qaz capabilities
- set: Set IEEE 802.1Qaz configuration
peer
- get: Get peer information
- set: Set peer configuration
Examples
Display current DCB configuration:
dcb-app eth0 show config
Set PFC on priority 4:
dcb-app eth0 set pfcs priority 4 on
Get IEEE 802.1Qaz capabilities:
dcb-app eth0 get ieee
Set IEEE 802.1Qaz configuration:
dcb-app eth0 set ieee max_tc 8
Common Issues
- Permission denied: Ensure the user has sufficient privileges to modify network settings.
- No DCB support: Check if the network interface supports DCB functionality.
- Invalid arguments: Verify that the provided arguments correspond to the correct syntax.
Integration
dcb-app
can be used in combination with other commands for advanced network management tasks. For instance:
tc qdisc show dev eth0 | grep dcb
This command chain displays the traffic shapers configured on an interface with DCB enabled.
Related Commands
ethtool
: Configure Ethernet device settingstc
: Traffic control and network shapinglshw
: List hardware information, including DCB support