1dcbtool(8) System Manager's Manual dcbtool(8)
2
6 dcbtool - manage the Data Center Bridging (DCB) settings of a DCB
7 interface
8
10 dcbtool -h
11 dcbtool -v
12 dcbtool [-rR]
13 dcbtool [-rR] [command] [command arguments]
14
17 dcbtool is used to query and set the DCB settings of a DCB capable Eth‐
18 ernet interface. It connects to the client interface of lldpad to per‐
19 form these operations. dcbtool will operate in interactive mode if it
20 is executed without a command. In interactive mode, dcbtool also func‐
21 tions as an event listener and will print out events received from lld‐
22 pad as they arrive.
23
25 -h show the dcbtool usage message
26 -v shows dcbtool version information
28 -r display the raw lldpad client interface messages as well as the
30 readable output.
31 -R display only the raw lldpad client interface messages
33
35 help shows the dcbtool usage message
36 ping test command. lldpad responds with "PPONG" if the client inter‐
38 face is operational.
39 license
41 displays dcbtool license information
42 quit exit from interactive mode
44 The following commands interact with lldpad to manage the daemon and
47 DCB features on DCB capable interfaces.
48 dcbtool general configuration commands:
50 <gc|go> dcbx
52 get the configured or operational version of the DCB capabili‐
53 ties exchange protocol. If different, the configured version
54 will take effect (and become the operational version) after lld‐
55 pad is restarted.
56 sc dcbx v:[1|2]
58 set the version of the DCB capabilities exchange protocol which
59 will be used the next time lldpad is started. Information about
60 version 1 can be found at:
61 <http://download.intel.com/technology/eedc/dcb_cep_spec.pdf>
62 Information about version 2 can be found at:
63 <http://www.ieee802.org/1/files/public/docs2008/az-wadekar-dcbx-
64 capability-exchange-discovery-protocol-1108-v1.01.pdf>
65 DCB per-interface commands:
67 gc <ifname> <feature>
69 get configuration of feature on interface ifname.
70 go <ifname> <feature>
72 get operational status of feature on interface ifname.
73 gp <ifname> <feature>
75 get peer configuration of feature on interface ifname.
76 sc <ifname> <feature> <args>
78 set the configuration of feature on interface ifname.
79 feature may be one of the following:
81 dcb DCB state of the port
83 pg priority groups
85 pfc priority flow control
87 app:<subtype>
89 application specific data
90 ll:<subtype>
92 logical link status
93 subtype can be:
95 0|fcoe Fiber Channel over Ethernet (FCoE)
97 args can include:
99 e:<0|1>
101 controls feature enable
102 a:<0|1>
104 controls whether the feature is advertised via DCBX to the peer
105 w:<0|1>
107 controls whether the feature is willing to change its opera‐
108 tional configuration based on what is received from the peer
109 [feature specific args]
111 arguments specific to a DCB feature
112 Feature specific arguments for dcb:
115 on|off enable or disable DCB for the interface. The go and gp commands
117 are not needed for the dcb feature. Also, the enable(e), adver‐
118 tise(a) and willing(w) arguments are not required.
119 Feature specific arguments for pg:
122 pgid:xxxxxxxx
124 Priority group ID for the 8 priorities. From left to right
125 (priorities 0-7), x is the corresponding priority group ID
126 value, which can be 0-7 for priority groups with bandwidth allo‐
127 cations or f (priority group ID 15) for the unrestricted prior‐
128 ity group.
129 pgpct:x,x,x,x,x,x,x,x
132 Priority group percentage of link bandwidth. From left to right
133 (priority groups 0-7), x is the percentage of link bandwidth
134 allocated to the corresponding priority group. The total band‐
135 width must equal 100%.
136 uppct:x,x,x,x,x,x,x,x
139 Priority percentage of priority group bandwidth. From left to
140 right (priorities 0-7), x is the percentage of priority group
141 bandwidth allocated to the corresponding priority. The sum of
142 percentages for priorities which belong to the same priority
143 group must total 100% (except for priority group 15).
144 strict:xxxxxxxx
147 Strict priority setting. From left to right (priorities 0-7), x
148 is 0 or 1. 1 indicates that the priority may utilize all of the
149 bandwidth allocated to its priority group.
150 up2tc:xxxxxxxx
153 Priority to traffic class mapping. From left to right (priori‐
154 ties 0-7), x is the traffic class (0-7) to which the priority is
155 mapped.
156 Feature specific arguments for pfc:
159 pfcup:xxxxxxxx
161 Enable/disable priority flow control. From left to right (pri‐
162 orities 0-7), x is 0 or 1. 1 indicates that the corresponding
163 priority is configured to transmit priority pause.
164 Feature specific arguments for app:<subtype>:
167 appcfg:xx
169 xx is a hexadecimal value representing an 8 bit bitmap where 1
170 bits indicate the priorities which frames for the applications
171 specified by subtype should use. The lowest order bit maps to
172 priority 0.
173 Feature specific arguments for ll:<subtype>:
176 status:[0|1]
178 For testing purposes, the logical link status may be set to 0 or
179 1. This setting is not persisted in the configuration file.
180
183 Enable DCB on interface eth2
184 dcbtool sc eth2 dcb on
186 Assign priorites 0-3 to priority group 0, priorites 4-6 to priority
189 group 1 and priority 7 to the unrestricted priority. Also, allocate
190 25% of link bandwidth to priority group 0 and 75% to group 1.
191 dcbtool sc eth2 pg pgid:0000111f pgpct:25,75,0,0,0,0,0,0
193 Enable transmit of Priority Flow Control for priority 3 and assign FCoE
196 to priority 3.
197 dcbtool sc eth2 pfc pfcup:00010000
199 dcbtool sc eth2 app:0 appcfg:08
200
203 dcbtool - DCB configuration utility
204 Copyright(c) 2007-2010 Intel Corporation. Portions of dcbtool are
205 based on:
206 hostapd-0.5.7
208 Copyright
210 (c) 2004-2008, Jouni Malinen <j@w1.fi>
211
214 This program is free software; you can redistribute it and/or modify it
215 under the terms and conditions of the GNU General Public License, ver‐
216 sion 2, as published by the Free Software Foundation.
217 This program is distributed in the hope it will be useful, but WITHOUT
219 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
220 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
221 for more details.
222 You should have received a copy of the GNU General Public License along
224 with this program; if not, write to the Free Software Foundation, Inc.,
225 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
226 The full GNU General Public License is included in this distribution in
228 the file called "COPYING".
229
231 Contact Information: e1000-eedc Mailing List <e1000-eedc@lists.source‐
232 forge.net> Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro,
233 OR 97124-6497
234 June 29, 2009 dcbtool(8)