показать / изменить настройки DCB (Data Center Bridging) (show / manipulate DCB (Data Center Bridging) settings)
Имя (Name)
dcb - show / manipulate DCB (Data Center Bridging) settings
Синопсис (Synopsis)
dcb [ OPTIONS ] { app | buffer | ets | maxrate | pfc } { COMMAND
| help }
dcb [ -force ] -batch filename
dcb [ OPTIONS ] help
Параметры (Options)
-n, --netns <NETNS>
switches dcb to the specified network namespace NETNS.
-V, --Version
Print the version of the dcb utility and exit.
-b, --batch <FILENAME>
Read commands from provided file or standard input and
invoke them. First failure will cause termination of dcb.
-f, --force
Don't terminate dcb on errors in batch mode. If there were
any errors during execution of the commands, the
application return code will be non zero.
-i, --iec
When showing rates, use ISO/IEC 1024-based prefixes (Ki,
Mi, Bi) instead of the 1000-based ones (K, M, B).
-j, --json
Generate JSON output.
-N, --Numeric
If the subtool in question translates numbers to symbolic
names in some way, suppress this translation.
-p, --pretty
When combined with -j generate a pretty JSON output.
-s, --statistics
If the object in question contains any statistical
counters, shown them as part of the "show" output.
OBJECTS
app - Configuration of application priority table
buffer - Configuration of port buffers
ets - Configuration of ETS (Enhanced Transmission Selection)
maxrate
- Configuration of per-TC maximum transmit rate
pfc - Configuration of PFC (Priority-based Flow Control)
Команды (Commands)
A COMMAND specifies the action to perform on the object. The set
of possible actions depends on the object type. As a rule, it is
possible to show objects and to invoke topical help, which prints
a list of available commands and argument syntax conventions.
ARRAY PARAMETERS
Like commands, specification of parameters is in the domain of
individual objects (and their commands) as well. However, much of
the DCB interface revolves around arrays of fixed size that
specify one value per some key, such as per traffic class or per
priority. There is therefore a single syntax for adjusting
elements of these arrays. It consists of a series of KEY:VALUE
pairs, where the meaning of the individual keys and values
depends on the parameter.
The elements are evaluated in order from left to right, and the
latter ones override the earlier ones. The elements that are not
specified on the command line are queried from the kernel and
their current value is retained.
As an example, take a made-up parameter tc-juju, which can be set
to charm traffic in a given TC with either good luck or bad luck.
KEY can therefore be 0..7 (as is usual for TC numbers in DCB),
and VALUE either of none, good, and bad. An example of changing a
juju value of TCs 0 and 7, while leaving all other intact, would
then be:
# dcb foo set dev eth0 tc-juju 0:good 7:bad
A special key, all, is recognized which sets the same value to
all array elements. This can be combined with the usual single-
element syntax. E.g. in the following, the juju of all keys is
set to none, except 0 and 7, which have other values:
# dcb foo set dev eth0 tc-juju all:none 0:good 7:bad
Статус выхода (Exit)
Exit status is 0 if command was successful or a positive integer
upon failure.
Смотри также (See also)
dcb-app(8), dcb-buffer(8), dcb-ets(8), dcb-maxrate(8), dcb-pfc(8)
Сообщение об ошибках (Reporting bugs)
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.
