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NAME | SYNOPSIS | DESCRIPTION | PARAMETERS | EXAMPLE & USAGE | EXIT STATUS | SEE ALSO | REPORTING BUGS | AUTHOR | COLOPHON |
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DCB-MAXRATE(8) Linux DCB-MAXRATE(8)
dcb-maxrate - show / manipulate port maxrate settings of the DCB
(Data Center Bridging) subsystem
dcb [ OPTIONS ] maxrate { COMMAND | help }
dcb maxrate show dev DEV [ tc-maxrate ]
dcb maxrate set dev DEV [ tc-maxrate RATE-MAP ]
RATE-MAP := [ RATE-MAP ] RATE-MAPPING
RATE-MAPPING := { TC | all }:RATE
TC := { 0 .. 7 }
RATE := { INTEGER[bit] | INTEGERKbit | INTEGERMib | ... }
dcb maxrate is used to configure and inspect maximum rate at which
traffic is allowed to egress from a given traffic class.
The following describes only the write direction, i.e. as used
with the set command. For the show command, the parameter name is
to be used as a simple keyword without further arguments. This
instructs the tool to show the value of a given parameter. When no
parameters are given, the tool shows the complete maxrate
configuration.
tc-maxrate RATE-MAP
RATE-MAP uses the array parameter syntax, see dcb(8) for
details. Keys are TC indices, values are traffic rates in
bits per second. The rates can use the notation documented
in section PARAMETERS at tc(8). Note that under that
notation, "bit" stands for bits per second whereas "b"
stands for bytes per second. When showing, the command line
option -i toggles between using decadic and ISO/IEC
prefixes.
Set rates of all traffic classes to 25Gbps, except for TC 6, which
will have the rate of 100Gbps:
# dcb maxrate set dev eth0 tc-maxrate all:25Gbit 6:100Gbit
Show what was set:
# dcb maxrate show dev eth0
tc-maxrate 0:25Gbit 1:25Gbit 2:25Gbit 3:25Gbit 4:25Gbit 5:25Gbit
6:100Gbit 7:25Gbit
Exit status is 0 if command was successful or a positive integer
upon failure.
dcb(8)
Report any bugs to the Network Developers mailing list
<netdev@vger.kernel.org> where the development and maintenance is
primarily done. You do not have to be subscribed to the list to
send a message there.
Petr Machata <me@pmachata.org>
This page is part of the iproute2 (utilities for controlling
TCP/IP networking and traffic) project. Information about the
project can be found at
⟨http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2⟩.
If you have a bug report for this manual page, send it to
netdev@vger.kernel.org, shemminger@osdl.org. This page was
obtained from the project's upstream Git repository
⟨https://git.kernel.org/pub/scm/network/iproute2/iproute2.git⟩ on
2025-08-11. (At that time, the date of the most recent commit
that was found in the repository was 2025-08-08.) If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page,
or you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a
mail to man-pages@man7.org
iproute2 22 November 2020 DCB-MAXRATE(8)
Pages that refer to this page: dcb(8)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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