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39 .Nd "Intel(R) PRO/1000 Gigabit Ethernet adapter driver"
41 To compile this driver into the kernel,
42 place the following line in your
43 kernel configuration file:
44 .Bd -ragged -offset indent
48 Alternatively, to load the driver as a
49 module at boot time, place the following line in
51 .Bd -literal -offset indent
57 driver provides support for PCI Gigabit Ethernet adapters based on
58 the Intel 82540, 82541ER, 82541PI, 82542, 82543, 82544, 82545, 82546,
59 82546EB, 82546GB, 82547, 82571, 81572, 82573, and 82574 Ethernet
61 The driver supports Transmit/Receive checksum offload
62 and Jumbo Frames on all but 82542-based adapters.
63 Furthermore it supports TCP segmentation offload (TSO) on all adapters but
64 those based on the 82543, 82544 and 82547 controller chips.
65 The identification LEDs of the adapters supported by the
67 driver can be controlled via the
69 API for localization purposes.
70 For further hardware information, see the
72 included with the driver.
74 For questions related to hardware requirements,
75 refer to the documentation supplied with your Intel PRO/1000 adapter.
76 All hardware requirements listed apply to use with
79 Support for Jumbo Frames is provided via the interface MTU setting.
80 Selecting an MTU larger than 1500 bytes with the
82 utility configures the adapter to receive and transmit Jumbo Frames.
83 The maximum MTU size for Jumbo Frames is 16114.
85 This driver version supports VLANs.
88 driver supports the following media types:
89 .Bl -tag -width ".Cm 10baseT/UTP"
91 Enables auto-negotiation for speed and duplex.
93 Sets 10Mbps operation.
100 Sets 100Mbps operation.
107 Sets 1000Mbps operation.
110 mode is supported at this speed.
112 Sets 1000Mbps operation.
115 mode is supported at this speed.
120 driver supports the following media options:
121 .Bl -tag -width ".Cm full-duplex"
123 Forces full-duplex operation
125 Forces half-duplex operation.
134 is not specified, the driver defaults to
137 For more information on configuring this device, see
142 driver supports Gigabit Ethernet adapters based on the Intel
143 82540, 82541ER, 82541PI, 82542, 82543, 82544, 82545, 82546, 82546EB,
144 82546GB, 82547, 82571, 82572, 82573, and 82574 controller chips:
148 Intel PRO/1000 CT Network Connection (82547)
150 Intel PRO/1000 F Server Adapter (82543)
152 Intel PRO/1000 Gigabit Server Adapter (82542)
154 Intel PRO/1000 GT Desktop Adapter (82541PI)
156 Intel PRO/1000 MF Dual Port Server Adapter (82546)
158 Intel PRO/1000 MF Server Adapter (82545)
160 Intel PRO/1000 MF Server Adapter (LX) (82545)
162 Intel PRO/1000 MT Desktop Adapter (82540)
164 Intel PRO/1000 MT Desktop Adapter (82541)
166 Intel PRO/1000 MT Dual Port Server Adapter (82546)
168 Intel PRO/1000 MT Quad Port Server Adapter (82546EB)
170 Intel PRO/1000 MT Server Adapter (82545)
172 Intel PRO/1000 PF Dual Port Server Adapter (82571)
174 Intel PRO/1000 PF Quad Port Server Adapter (82571)
176 Intel PRO/1000 PF Server Adapter (82572)
178 Intel PRO/1000 PT Desktop Adapter (82572)
180 Intel PRO/1000 PT Dual Port Server Adapter (82571)
182 Intel PRO/1000 PT Quad Port Server Adapter (82571)
184 Intel PRO/1000 PT Server Adapter (82572)
186 Intel PRO/1000 T Desktop Adapter (82544)
188 Intel PRO/1000 T Server Adapter (82543)
190 Intel PRO/1000 XF Server Adapter (82544)
192 Intel PRO/1000 XT Server Adapter (82544)
195 Tunables can be set at the
197 prompt before booting the kernel or stored in
199 .Bl -tag -width indent
201 Number of receive descriptors allocated by the driver.
202 The default value is 256.
203 The 82542 and 82543-based adapters can handle up to 256 descriptors,
204 while others can have up to 4096.
206 Number of transmit descriptors allocated by the driver.
207 The default value is 256.
208 The 82542 and 82543-based adapters can handle up to 256 descriptors,
209 while others can have up to 4096.
210 .It Va hw.em.rx_int_delay
211 This value delays the generation of receive interrupts in units of
213 The default value is 0, since adapters may hang with this feature
215 .It Va hw.em.rx_abs_int_delay
217 .Va hw.em.rx_int_delay
218 is non-zero, this tunable limits the maximum delay in which a receive
219 interrupt is generated.
220 .It Va hw.em.tx_int_delay
221 This value delays the generation of transmit interrupts in units of
223 The default value is 64.
224 .It Va hw.em.tx_abs_int_delay
226 .Va hw.em.tx_int_delay
227 is non-zero, this tunable limits the maximum delay in which a transmit
228 interrupt is generated.
231 .Bl -tag -width /dev/led/em*
233 identification LED device nodes
236 Make the identification LED of em0 blink:
238 .Dl "echo f2 > /dev/led/em0"
240 Turn the identification LED of em0 off again:
242 .Dl "echo 0 > /dev/led/em0"
245 .It "em%d: Unable to allocate bus resource: memory"
246 A fatal initialization error has occurred.
247 .It "em%d: Unable to allocate bus resource: interrupt"
248 A fatal initialization error has occurred.
249 .It "em%d: watchdog timeout -- resetting"
250 The device has stopped responding to the network, or there is a problem with
251 the network connection (cable).
254 For general information and support,
255 go to the Intel support website at:
256 .Pa http://support.intel.com .
258 If an issue is identified with the released source code on the supported kernel
259 with a supported adapter, email the specific information related to the
261 .Aq freebsdnic@mailbox.intel.com .
275 device driver first appeared in
280 driver was written by
281 .An Intel Corporation Aq freebsdnic@mailbox.intel.com .
283 Hardware-assisted VLAN processing is disabled by default.
284 You can enable it on an