Provided by: dcbd_0.9.19-0ubuntu1_amd64 bug


       dcbtool - manage the Data Center Bridging (DCB) settings of a DCB interface


       dcbtool -h
       dcbtool -v
       dcbtool [-rR]
       dcbtool [-rR] [command] [command arguments]


       dcbtool is used to query and set the DCB settings of a DCB capable Ethernet interface.  It
       connects to the client interface of  dcbd  to  perform  these  operations.   dcbtool  will
       operate  in  interactive  mode  if it is executed without a command.  In interactive mode,
       dcbtool also functions as an event listener and will print out events received  from  dcbd
       as they arrive.


       -h     show the dcbtool usage message

       -v     shows dcbtool version information

       -r     display the raw dcbd client interface messages as well as the readable output.

       -R     display only the raw dcbd client interface messages


       help   shows the dcbtool usage message

       ping   test  command.   The  dcbd  daemon responds with "PPONG" if the client interface is

              displays dcbtool license information

       quit   exit from interactive mode

       The following commands interact with the dcbd daemon to manage the daemon and DCB features
       on DCB capable interfaces.

       dcbd general configuration commands:

       <gc|go> dcbx
              get  the  configured  or  operational  version  of  the  DCB  capabilities exchange
              protocol.  If different, the configured version will take effect  (and  become  the
              operational version) after dcbd is restarted.

       sc dcbx v:[1|2]
              set  the  version  of the DCB capabilities exchange protocol which will be used the
              next time dcbd is started.  Information about version 1 can be found at:
              <>   Information    about
              version 2 can be found at:

       DCB per-interface commands:

       gc <ifname> <feature>
              get configuration of feature on interface ifname.

       go <ifname> <feature>
              get operational status of feature on interface ifname.

       gp <ifname> <feature>
              get peer configuration of feature on interface ifname.

       sc <ifname> <feature> <args>
              set the configuration of feature on interface ifname.

       feature may be one of the following:

       dcb    DCB state of the port

       pg     priority groups

       pfc    priority flow control

              application specific data

              logical link status

       subtype can be:

       0|fcoe Fiber Channel over Ethernet (FCoE)

       args can include:

              controls feature enable

              controls whether the feature is advertised via DCBX to the peer

              controls whether the feature is willing to  change  its  operational  configuration
              based on what is received from the peer

       [feature specific args]
              arguments specific to a DCB feature

       Feature specific arguments for dcb:

       on|off enable or disable DCB for the interface.  The go and gp commands are not needed for
              the dcb feature.  Also, the enable(e), advertise(a) and  willing(w)  arguments  are
              not required.

       Feature specific arguments for pg:

              Priority  group ID for the 8 priorities.  From left to right (priorities 0-7), x is
              the corresponding priority group ID value, which can be  0-7  for  priority  groups
              with  bandwidth  allocations  or  f  (priority  group  ID  15) for the unrestricted
              priority group.

              Priority group percentage of link bandwidth.  From left to right  (priority  groups
              0-7), x is the percentage of link bandwidth allocated to the corresponding priority
              group.  The total bandwidth must equal 100%.

              Priority percentage of priority group bandwidth.  From left  to  right  (priorities
              0-7),   x   is  the  percentage  of  priority  group  bandwidth  allocated  to  the
              corresponding priority.  The sum of percentages for priorities which belong to  the
              same priority group must total 100% (except for priority group 15).

              Strict  priority  setting.   From  left  to right (priorities 0-7), x is 0 or 1.  1
              indicates that the priority may utilize all  of  the  bandwidth  allocated  to  its
              priority group.

              Priority  to  traffic class mapping.  From left to right (priorities 0-7), x is the
              traffic class (0-7) to which the priority is mapped.

       Feature specific arguments for pfc:

              Enable/disable priority flow control.  From left to right (priorities 0-7), x is  0
              or  1.   1  indicates  that  the  corresponding  priority is configured to transmit
              priority pause.

       Feature specific arguments for app:<subtype>:

              xx is a hexadecimal value representing an 8 bit bitmap where 1  bits  indicate  the
              priorities  which frames for the applications specified by subtype should use.  The
              lowest order bit maps to priority 0.

       Feature specific arguments for ll:<subtype>:

              For testing purposes, the logical link status may be set to 0 or 1.   This  setting
              is not persisted in the configuration file.


       Enable DCB on interface eth2

       dcbtool sc eth2 dcb on

       Assign priorites 0-3 to priority group 0, priorites 4-6 to priority group 1 and priority 7
       to the unrestricted priority.  Also, allocate 25% of link bandwidth to  priority  group  0
       and 75% to group 1.

       dcbtool sc eth2 pg pgid:0000111f pgpct:25,75,0,0,0,0,0,0

       Enable transmit of Priority Flow Control for priority 3 and assign FCoE to priority 3.

       dcbtool sc eth2 pfc pfcup:00010000
       dcbtool sc eth2 app:0 appcfg:08


       dcbtool - DCB configuration utility
       Copyright(c) 2007-2009 Intel Corporation.   Portions of dcbtool are based on:


              (c) 2004-2008, Jouni Malinen <>

       This  program  is  free software; you can redistribute it and/or modify it under the terms
       and conditions of the GNU General Public License, version 2,  as  published  by  the  Free
       Software Foundation.

       This  program  is  distributed  in  the  hope it will be useful, but WITHOUT ANY WARRANTY;
       without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE.
       See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program;
       if not, write to the Free Software Foundation, Inc., 51 Franklin St - Fifth Floor, Boston,
       MA 02110-1301 USA.

       The  full  GNU  General Public License is included in this distribution in the file called


       Contact Information:  e1000-eedc  Mailing  List  <>  Intel
       Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

                                          June 29, 2009                                dcbtool(8)