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685343fc TG |
1 | What: /sys/class/net/<iface>/name_assign_type |
2 | Date: July 2014 | |
3 | KernelVersion: 3.17 | |
4 | Contact: netdev@vger.kernel.org | |
5 | Description: | |
6 | Indicates the name assignment type. Possible values are: | |
7 | 1: enumerated by the kernel, possibly in an unpredictable way | |
8 | 2: predictably named by the kernel | |
9 | 3: named by userspace | |
10 | 4: renamed | |
11 | ||
39f1a2f0 FF |
12 | What: /sys/class/net/<iface>/addr_assign_type |
13 | Date: July 2010 | |
14 | KernelVersion: 3.2 | |
15 | Contact: netdev@vger.kernel.org | |
16 | Description: | |
17 | Indicates the address assignment type. Possible values are: | |
18 | 0: permanent address | |
19 | 1: randomly generated | |
20 | 2: stolen from another device | |
21 | 3: set using dev_set_mac_address | |
22 | ||
23 | What: /sys/class/net/<iface>/addr_len | |
24 | Date: April 2005 | |
25 | KernelVersion: 2.6.12 | |
26 | Contact: netdev@vger.kernel.org | |
27 | Description: | |
28 | Indicates the hardware address size in bytes. | |
29 | Values vary based on the lower-level protocol used by the | |
30 | interface (Ethernet, FDDI, ATM, IEEE 802.15.4...). See | |
31 | include/uapi/linux/if_*.h for actual values. | |
32 | ||
33 | What: /sys/class/net/<iface>/address | |
34 | Date: April 2005 | |
35 | KernelVersion: 2.6.12 | |
36 | Contact: netdev@vger.kernel.org | |
37 | Description: | |
38 | Hardware address currently assigned to this interface. | |
39 | Format is a string, e.g: 00:11:22:33:44:55 for an Ethernet MAC | |
40 | address. | |
41 | ||
784b58a3 BT |
42 | What: /sys/class/net/<bridge iface>/bridge/group_fwd_mask |
43 | Date: January 2012 | |
44 | KernelVersion: 3.2 | |
45 | Contact: netdev@vger.kernel.org | |
46 | Description: | |
47 | Bitmask to allow forwarding of link local frames with address | |
48 | 01-80-C2-00-00-0X on a bridge device. Only values that set bits | |
49 | not matching BR_GROUPFWD_RESTRICTED in net/bridge/br_private.h | |
50 | allowed. | |
51 | Default value 0 does not forward any link local frames. | |
52 | ||
53 | Restricted bits: | |
54 | 0: 01-80-C2-00-00-00 Bridge Group Address used for STP | |
55 | 1: 01-80-C2-00-00-01 (MAC Control) 802.3 used for MAC PAUSE | |
56 | 2: 01-80-C2-00-00-02 (Link Aggregation) 802.3ad | |
57 | ||
58 | Any values not setting these bits can be used. Take special | |
59 | care when forwarding control frames e.g. 802.1X-PAE or LLDP. | |
60 | ||
39f1a2f0 FF |
61 | What: /sys/class/net/<iface>/broadcast |
62 | Date: April 2005 | |
63 | KernelVersion: 2.6.12 | |
64 | Contact: netdev@vger.kernel.org | |
65 | Description: | |
66 | Hardware broadcast address for this interface. Format is a | |
67 | string, e.g: ff:ff:ff:ff:ff:ff for an Ethernet broadcast MAC | |
68 | address. | |
69 | ||
70 | What: /sys/class/net/<iface>/carrier | |
71 | Date: April 2005 | |
72 | KernelVersion: 2.6.12 | |
73 | Contact: netdev@vger.kernel.org | |
74 | Description: | |
75 | Indicates the current physical link state of the interface. | |
76 | Posssible values are: | |
77 | 0: physical link is down | |
78 | 1: physical link is up | |
79 | ||
80 | Note: some special devices, e.g: bonding and team drivers will | |
81 | allow this attribute to be written to force a link state for | |
82 | operating correctly and designating another fallback interface. | |
83 | ||
84 | What: /sys/class/net/<iface>/dev_id | |
85 | Date: April 2008 | |
86 | KernelVersion: 2.6.26 | |
87 | Contact: netdev@vger.kernel.org | |
88 | Description: | |
89 | Indicates the device unique identifier. Format is an hexadecimal | |
90 | value. This is used to disambiguate interfaces which might be | |
91 | stacked (e.g: VLAN interfaces) but still have the same MAC | |
92 | address as their parent device. | |
93 | ||
4c0b6534 AM |
94 | What: /sys/class/net/<iface>/dev_port |
95 | Date: February 2014 | |
96 | KernelVersion: 3.15 | |
97 | Contact: netdev@vger.kernel.org | |
98 | Description: | |
99 | Indicates the port number of this network device, formatted | |
100 | as a decimal value. Some NICs have multiple independent ports | |
101 | on the same PCI bus, device and function. This attribute allows | |
102 | userspace to distinguish the respective interfaces. | |
103 | ||
104 | Note: some device drivers started to use 'dev_id' for this | |
105 | purpose since long before 3.15 and have not adopted the new | |
106 | attribute ever since. To query the port number, some tools look | |
107 | exclusively at 'dev_port', while others only consult 'dev_id'. | |
108 | If a network device has multiple client adapter ports as | |
109 | described in the previous paragraph and does not set this | |
110 | attribute to its port number, it's a kernel bug. | |
111 | ||
39f1a2f0 FF |
112 | What: /sys/class/net/<iface>/dormant |
113 | Date: March 2006 | |
114 | KernelVersion: 2.6.17 | |
115 | Contact: netdev@vger.kernel.org | |
116 | Description: | |
117 | Indicates whether the interface is in dormant state. Possible | |
118 | values are: | |
119 | 0: interface is not dormant | |
120 | 1: interface is dormant | |
121 | ||
122 | This attribute can be used by supplicant software to signal that | |
123 | the device is not usable unless some supplicant-based | |
124 | authentication is performed (e.g: 802.1x). 'link_mode' attribute | |
125 | will also reflect the dormant state. | |
126 | ||
127 | What: /sys/clas/net/<iface>/duplex | |
128 | Date: October 2009 | |
129 | KernelVersion: 2.6.33 | |
130 | Contact: netdev@vger.kernel.org | |
131 | Description: | |
132 | Indicates the interface latest or current duplex value. Possible | |
133 | values are: | |
134 | half: half duplex | |
135 | full: full duplex | |
136 | ||
137 | Note: This attribute is only valid for interfaces that implement | |
9b300495 | 138 | the ethtool get_link_ksettings method (mostly Ethernet). |
39f1a2f0 FF |
139 | |
140 | What: /sys/class/net/<iface>/flags | |
141 | Date: April 2005 | |
142 | KernelVersion: 2.6.12 | |
143 | Contact: netdev@vger.kernel.org | |
144 | Description: | |
145 | Indicates the interface flags as a bitmask in hexadecimal. See | |
146 | include/uapi/linux/if.h for a list of all possible values and | |
147 | the flags semantics. | |
148 | ||
149 | What: /sys/class/net/<iface>/ifalias | |
150 | Date: September 2008 | |
151 | KernelVersion: 2.6.28 | |
152 | Contact: netdev@vger.kernel.org | |
153 | Description: | |
154 | Indicates/stores an interface alias name as a string. This can | |
155 | be used for system management purposes. | |
156 | ||
157 | What: /sys/class/net/<iface>/ifindex | |
158 | Date: April 2005 | |
159 | KernelVersion: 2.6.12 | |
160 | Contact: netdev@vger.kernel.org | |
161 | Description: | |
162 | Indicates the system-wide interface unique index identifier as a | |
163 | decimal number. This attribute is used for mapping an interface | |
164 | identifier to an interface name. It is used throughout the | |
165 | networking stack for specifying the interface specific | |
166 | requests/events. | |
167 | ||
168 | What: /sys/class/net/<iface>/iflink | |
169 | Date: April 2005 | |
170 | KernelVersion: 2.6.12 | |
171 | Contact: netdev@vger.kernel.org | |
172 | Description: | |
173 | Indicates the system-wide interface unique index identifier a | |
174 | the interface is linked to. Format is decimal. This attribute is | |
175 | used to resolve interfaces chaining, linking and stacking. | |
176 | Physical interfaces have the same 'ifindex' and 'iflink' values. | |
177 | ||
178 | What: /sys/class/net/<iface>/link_mode | |
179 | Date: March 2006 | |
180 | KernelVersion: 2.6.17 | |
181 | Contact: netdev@vger.kernel.org | |
182 | Description: | |
183 | Indicates the interface link mode, as a decimal number. This | |
184 | attribute should be used in conjunction with 'dormant' attribute | |
185 | to determine the interface usability. Possible values: | |
186 | 0: default link mode | |
187 | 1: dormant link mode | |
188 | ||
189 | What: /sys/class/net/<iface>/mtu | |
190 | Date: April 2005 | |
191 | KernelVersion: 2.6.12 | |
192 | Contact: netdev@vger.kernel.org | |
193 | Description: | |
194 | Indicates the interface currently configured MTU value, in | |
195 | bytes, and in decimal format. Specific values depends on the | |
196 | lower-level interface protocol used. Ethernet devices will show | |
197 | a 'mtu' attribute value of 1500 unless changed. | |
198 | ||
1578ea3a | 199 | What: /sys/class/net/<iface>/netdev_group |
39f1a2f0 FF |
200 | Date: January 2011 |
201 | KernelVersion: 2.6.39 | |
202 | Contact: netdev@vger.kernel.org | |
203 | Description: | |
204 | Indicates the interface network device group, as a decimal | |
205 | integer. Default value is 0 which corresponds to the initial | |
206 | network devices group. The group can be changed to affect | |
207 | routing decisions (see: net/ipv4/fib_rules and | |
208 | net/ipv6/fib6_rules.c). | |
209 | ||
210 | What: /sys/class/net/<iface>/operstate | |
211 | Date: March 2006 | |
212 | KernelVersion: 2.6.17 | |
213 | Contact: netdev@vger.kernel.org | |
214 | Description: | |
215 | Indicates the interface RFC2863 operational state as a string. | |
216 | Possible values are: | |
217 | "unknown", "notpresent", "down", "lowerlayerdown", "testing", | |
218 | "dormant", "up". | |
219 | ||
79499bca FF |
220 | What: /sys/class/net/<iface>/phys_port_id |
221 | Date: July 2013 | |
222 | KernelVersion: 3.12 | |
223 | Contact: netdev@vger.kernel.org | |
224 | Description: | |
225 | Indicates the interface unique physical port identifier within | |
226 | the NIC, as a string. | |
227 | ||
db24a904 DA |
228 | What: /sys/class/net/<iface>/phys_port_name |
229 | Date: March 2015 | |
230 | KernelVersion: 4.0 | |
231 | Contact: netdev@vger.kernel.org | |
232 | Description: | |
233 | Indicates the interface physical port name within the NIC, | |
234 | as a string. | |
235 | ||
39f1a2f0 FF |
236 | What: /sys/class/net/<iface>/speed |
237 | Date: October 2009 | |
238 | KernelVersion: 2.6.33 | |
239 | Contact: netdev@vger.kernel.org | |
240 | Description: | |
241 | Indicates the interface latest or current speed value. Value is | |
242 | an integer representing the link speed in Mbits/sec. | |
243 | ||
244 | Note: this attribute is only valid for interfaces that implement | |
9b300495 | 245 | the ethtool get_link_ksettings method (mostly Ethernet). |
39f1a2f0 FF |
246 | |
247 | What: /sys/class/net/<iface>/tx_queue_len | |
248 | Date: April 2005 | |
249 | KernelVersion: 2.6.12 | |
250 | Contact: netdev@vger.kernel.org | |
251 | Description: | |
252 | Indicates the interface transmit queue len in number of packets, | |
253 | as an integer value. Value depend on the type of interface, | |
254 | Ethernet network adapters have a default value of 1000 unless | |
255 | configured otherwise | |
256 | ||
257 | What: /sys/class/net/<iface>/type | |
258 | Date: April 2005 | |
259 | KernelVersion: 2.6.12 | |
260 | Contact: netdev@vger.kernel.org | |
261 | Description: | |
262 | Indicates the interface protocol type as a decimal value. See | |
263 | include/uapi/linux/if_arp.h for all possible values. | |
aecbe01e JP |
264 | |
265 | What: /sys/class/net/<iface>/phys_switch_id | |
266 | Date: November 2014 | |
267 | KernelVersion: 3.19 | |
268 | Contact: netdev@vger.kernel.org | |
269 | Description: | |
270 | Indicates the unique physical switch identifier of a switch this | |
271 | port belongs to, as a string. | |
8f602198 FF |
272 | |
273 | What: /sys/class/net/<iface>/phydev | |
274 | Date: May 2017 | |
275 | KernelVersion: 4.13 | |
276 | Contact: netdev@vger.kernel.org | |
277 | Description: | |
278 | Symbolic link to the PHY device this network device is attached | |
279 | to. | |
b2d3bcfa DD |
280 | |
281 | What: /sys/class/net/<iface>/carrier_changes | |
282 | Date: Mar 2014 | |
283 | KernelVersion: 3.15 | |
284 | Contact: netdev@vger.kernel.org | |
285 | Description: | |
286 | 32-bit unsigned integer counting the number of times the link has | |
287 | seen a change from UP to DOWN and vice versa | |
288 | ||
289 | What: /sys/class/net/<iface>/carrier_up_count | |
290 | Date: Jan 2018 | |
291 | KernelVersion: 4.16 | |
292 | Contact: netdev@vger.kernel.org | |
293 | Description: | |
294 | 32-bit unsigned integer counting the number of times the link has | |
295 | been up | |
296 | ||
297 | What: /sys/class/net/<iface>/carrier_down_count | |
298 | Date: Jan 2018 | |
299 | KernelVersion: 4.16 | |
300 | Contact: netdev@vger.kernel.org | |
301 | Description: | |
302 | 32-bit unsigned integer counting the number of times the link has | |
303 | been down |