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.\" -*- nroff -*-
.\" Copyright 1999 by David S. Miller.  All Rights Reserved.
.\" Portions Copyright 2001 Sun Microsystems
.\" Portions Copyright 2007, 2009 Free Software Foundation, Inc.
.\" This file may be copied under the terms of the GNU Public License.
.\" 
.\" There must be no text lines before .TH.  Use '.' for vertical spacing.
.\"
.\"	.An - list of n alternative values as in "flav vanilla|strawberry"
.\"
.de A1
\\fB\\$1\\fP|\\fB\\$2\\fP
..
.de A2
\\fB\\$1\\fP\ \\fB\\$2\\fP|\\fB\\$3\\fP
..
.de A3
\\fB\\$1\\fP\ \\fB\\$2\\fP|\\fB\\$3\\fP|\\fB\\$4\\fP
..
.de A4
\\fB\\$1\\fP\ \\fB\\$2\\fP|\\fB\\$3\\fP|\\fB\\$4\\fP|\\fB\\$5\\fP
..
.\" 
.\"	.Bn - same as above but framed by square brackets
.\"
.de B1
[\\fB\\$1\\fP|\\fB\\$2\\fP]
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[\\fB\\$1\\fP\ \\fB\\$2\\fP|\\fB\\$3\\fP|\\fB\\$4\\fP]
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.de B4
[\\fB\\$1\\fP\ \\fB\\$2\\fP|\\fB\\$3\\fP|\\fB\\$4\\fP|\\fB\\$5\\fP]
..
.\"
.\"	.BN - value with a numeric input as in "[value N]"
.\"
.de BN
[\\fB\\$1\\fP\ \\fIN\\fP]
..
.\"
.\"	.BM - same as above but has a mask field for format "[value N [m N]]"
.\"
.de BM
[\\fB\\$1\\fP\ \\fIN\\fP\ [\\fBm\\fP\ \\fIN\\fP]]
..
.\"
.\"	\(*MA - mac address
.\"
.ds MA \fIxx\fP\fB:\fP\fIyy\fP\fB:\fP\fIzz\fP\fB:\fP\fIaa\fP\fB:\fP\fIbb\fP\fB:\fP\fIcc\fP
.\"
.\"	\(*PA - IP address
.\"
.ds PA \fIx\fP\fB.\fP\fIx\fP\fB.\fP\fIx\fP\fB.\fP\fIx\fP
.\"
.\"	\(*WO - wol flags
.\"
.ds WO \fBp\fP|\fBu\fP|\fBm\fP|\fBb\fP|\fBa\fP|\fBg\fP|\fBs\fP|\fBd\fP...
.\"
.\"	\(*FL - flow type values
.\"
.ds FL \fBtcp4\fP|\fBudp4\fP|\fBah4\fP|\fBesp4\fP|\fBsctp4\fP|\fBtcp6\fP|\fBudp6\fP|\fBah6\fP|\fBesp6\fP|\fBsctp6\fP
.\"
.\"	\(*HO - hash options
.\"
.ds HO \fBm\fP|\fBv\fP|\fBt\fP|\fBs\fP|\fBd\fP|\fBf\fP|\fBn\fP|\fBr\fP...
.\"
.\"	\(*SD - Self-diag test values
.\"
.ds SD \fBoffline\fP|\fBonline\fP|\fBexternal_lb\fP
.\"
.\"	\(*NC - Network Classifier type values
.\"
.ds NC \fBether\fP|\fBip4\fP|\fBtcp4\fP|\fBudp4\fP|\fBsctp4\fP|\fBah4\fP|\fBesp4\fP
..
.\"
.\" Start URL.
.de UR
.  ds m1 \\$1\"
.  nh
.  if \\n(mH \{\
.    \" Start diversion in a new environment.
.    do ev URL-div
.    do di URL-div
.  \}
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.\" End URL.
.de UE
.  ie \\n(mH \{\
.    br
.    di
.    ev
.
.    \" Has there been one or more input lines for the link text?
.    ie \\n(dn \{\
.      do HTML-NS "<a href=""\\*(m1"">"
.      \" Yes, strip off final newline of diversion and emit it.
.      do chop URL-div
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\&\\$*\"
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\\*(la\\*(m1\\*(ra\\$*\"
.
.  hy \\n(HY
..
.
.TH ETHTOOL 8 "January 2011" "Ethtool version @VERSION@"
.SH NAME
ethtool \- query or control network driver and hardware settings
.
.SH SYNOPSIS
.\" Do not adjust lines (i.e. left justification) and do not hyphenate.
.na
.nh
.HP
.B ethtool
.I devname
.HP
.B ethtool \-h|\-\-help
.HP
.B ethtool \-\-version
.HP
.B ethtool \-a|\-\-show\-pause
.I devname
.HP
.B ethtool \-A|\-\-pause
.I devname
.B2 autoneg on off
.B2 rx on off
.B2 tx on off
.HP
.B ethtool \-c|\-\-show\-coalesce
.I devname
.HP
.B ethtool \-C|\-\-coalesce
.I devname
.B2 adaptive\-rx on off
.B2 adaptive\-tx on off
.BN rx\-usecs
.BN rx\-frames
.BN rx\-usecs\-irq
.BN rx\-frames\-irq
.BN tx\-usecs
.BN tx\-frames
.BN tx\-usecs\-irq
.BN tx\-frames\-irq
.BN stats\-block\-usecs
.BN pkt\-rate\-low
.BN rx\-usecs\-low
.BN rx\-frames\-low
.BN tx\-usecs\-low
.BN tx\-frames\-low
.BN pkt\-rate\-high
.BN rx\-usecs\-high
.BN rx\-frames\-high
.BN tx\-usecs\-high
.BN tx\-frames\-high
.BN sample\-interval
.HP
.B ethtool \-g|\-\-show\-ring
.I devname
.HP
.B ethtool \-G|\-\-set\-ring
.I devname
.BN rx
.BN rx\-mini
.BN rx\-jumbo
.BN tx
.HP
.B ethtool \-i|\-\-driver
.I devname
.HP
.B ethtool \-d|\-\-register\-dump
.I devname
.B2 raw on off
.B2 hex on off
.RB [ file 
.IR name ]
.HP
.B ethtool \-e|\-\-eeprom\-dump
.I devname
.B2 raw on off
.BN offset
.BN length
.HP
.B ethtool \-E|\-\-change\-eeprom
.I devname
.BN magic
.BN offset
.BN length
.BN value
.HP
.B ethtool \-k|\-\-show\-offload
.I devname
.HP
.B ethtool \-K|\-\-offload
.I devname
.B2 rx on off
.B2 tx on off
.B2 sg on off
.B2 tso on off
.B2 ufo on off
.B2 gso on off
.B2 gro on off
.B2 lro on off
.B2 rxvlan on off
.B2 txvlan on off
.B2 rxhash on off
.HP
.B ethtool \-p|\-\-identify
.I devname
.RI [ N ]
.HP
.B ethtool \-P|\-\-show\-permaddr
.I devname
.HP
.B ethtool \-r|\-\-negotiate
.I devname
.HP
.B ethtool \-S|\-\-statistics
.I devname
.HP
.B ethtool \-t|\-\-test
.I devname
.RI [\*(SD]
.HP
.B ethtool \-s
.I devname
.BI speed \ N
.B2 duplex half full
.B4 port tp aui bnc mii fibre
.B2 autoneg on off
.BN advertise
.BN phyad
.B2 xcvr internal external
.RB [ wol \ \*(WO]
.RB [ sopass \ \*(MA]
.RB [ msglvl
.IR N \ |
.BI msglvl \ type
.A1 on off
.RB ...]
.HP
.B ethtool \-n
.I devname
.BR rx\-flow\-hash \ \*(FL
.HP
.B ethtool \-N
.I devname
.BR rx\-flow\-hash \ \*(FL \: \*(HO
.HP
.B ethtool \-w|\-\-get\-dump
.I devname
.RB [ data
.IR filename ]
.HP
.B ethtool\ \-W|\-\-set\-dump
.I devname
.BI \ N
.HP
.B ethtool \-x|\-\-show\-rxfh\-indir
.I devname
.HP
.B ethtool \-X|\-\-set\-rxfh\-indir
.I devname
.RB [\  equal
.IR N \ |
.BI weight\  W0
.IR W1
.RB ...\ ]
.HP
.B ethtool \-f|\-\-flash
.I devname
.RI FILE
.RI [ N ]
.HP
.B ethtool \-u|\-\-show\-ntuple
.I devname
.BN rule
.HP
.BI ethtool\ \-U|\-\-config\-ntuple \ devname
.BN delete
.RB [\  flow\-type \ \*(NC
.RB [ src \ \*(MA\ [ m \ \*(MA]]
.RB [ dst \ \*(MA\ [ m \ \*(MA]]
.BM proto
.RB [ src\-ip \ \*(PA\ [ m \ \*(PA]]
.RB [ dst\-ip \ \*(PA\ [ m \ \*(PA]]
.BM tos
.BM l4proto
.BM src\-port
.BM dst\-port
.BM spi
.BM l4data
.BM vlan\-etype
.BM vlan
.BM user\-def
.BN action
.BN loc
.RB ]
.HP
.B ethtool \-l|\-\-show\-channels
.I devname
.HP
.B ethtool \-L|\-\-set\-channels
.I devname
.BN rx
.BN tx
.BN other
.BN combined
.
.\" Adjust lines (i.e. full justification) and hyphenate.
.ad
.hy

.SH DESCRIPTION
.BI ethtool
is used to query and control network device driver and hardware
settings, particularly for wired Ethernet devices.

.I devname
is the name of the network device on which ethtool should operate.

.SH OPTIONS
.B ethtool
with a single argument specifying the device name prints current
settings of the specified device.
.TP
.B \-h \-\-help
Shows a short help message.
.TP
.B \-\-version
Shows the ethtool version number.
.TP
.B \-a \-\-show\-pause
Queries the specified Ethernet device for pause parameter information.
.TP
.B \-A \-\-pause
Changes the pause parameters of the specified Ethernet device.
.TP
.A2 autoneg on off
Specifies whether pause autonegotiation should be enabled.
.TP
.A2 rx on off
Specifies whether RX pause should be enabled.
.TP
.A2 tx on off
Specifies whether TX pause should be enabled.
.TP
.B \-c \-\-show\-coalesce
Queries the specified network device for coalescing information.
.TP
.B \-C \-\-coalesce
Changes the coalescing settings of the specified network device.
.TP
.B \-g \-\-show\-ring
Queries the specified network device for rx/tx ring parameter information.
.TP
.B \-G \-\-set\-ring
Changes the rx/tx ring parameters of the specified network device.
.TP
.BI rx \ N
Changes the number of ring entries for the Rx ring.
.TP
.BI rx\-mini \ N
Changes the number of ring entries for the Rx Mini ring.
.TP
.BI rx\-jumbo \ N
Changes the number of ring entries for the Rx Jumbo ring.
.TP
.BI tx \ N
Changes the number of ring entries for the Tx ring.
.TP
.B \-i \-\-driver
Queries the specified network device for associated driver information.
.TP
.B \-d \-\-register\-dump
Retrieves and prints a register dump for the specified network device.
The register format for some devices is known and decoded others
are printed in hex.
When 
.I raw 
is enabled, then ethtool dumps the raw register data to stdout.
If
.I file
is specified, then use contents of previous raw register dump, rather
than reading from the device.

.TP
.B \-e \-\-eeprom\-dump
Retrieves and prints an EEPROM dump for the specified network device.
When raw is enabled, then it dumps the raw EEPROM data to stdout. The
length and offset parameters allow dumping certain portions of the EEPROM.
Default is to dump the entire EEPROM.
.TP
.B \-E \-\-change\-eeprom
If value is specified, changes EEPROM byte for the specified network device.
offset and value specify which byte and it's new value. If value is not
specified, stdin is read and written to the EEPROM. The length and offset
parameters allow writing to certain portions of the EEPROM.
Because of the persistent nature of writing to the EEPROM, a device-specific
magic key must be specified to prevent the accidental writing to the EEPROM.
.TP
.B \-k \-\-show\-offload
Queries the specified network device for offload information.
.TP
.B \-K \-\-offload
Changes the offload parameters of the specified network device.
.TP
.A2 rx on off
Specifies whether RX checksumming should be enabled.
.TP
.A2 tx on off
Specifies whether TX checksumming should be enabled.
.TP
.A2 sg on off
Specifies whether scatter-gather should be enabled.
.TP
.A2 tso on off
Specifies whether TCP segmentation offload should be enabled.
.TP
.A2 ufo on off
Specifies whether UDP fragmentation offload should be enabled 
.TP
.A2 gso on off
Specifies whether generic segmentation offload should be enabled 
.TP
.A2 gro on off
Specifies whether generic receive offload should be enabled
.TP
.A2 lro on off
Specifies whether large receive offload should be enabled
.TP
.A2 rxvlan on off
Specifies whether RX VLAN acceleration should be enabled
.TP
.A2 txvlan on off
Specifies whether TX VLAN acceleration should be enabled
.TP
.A2 rxhash on off
Specifies whether receive hashing offload should be enabled
.TP
.B \-p \-\-identify
Initiates adapter-specific action intended to enable an operator to
easily identify the adapter by sight.  Typically this involves
blinking one or more LEDs on the specific network port.
.TP
.B N
Length of time to perform phys-id, in seconds.
.TP
.B \-P \-\-show\-permaddr
Queries the specified network device for permanent hardware address.
.TP
.B \-r \-\-negotiate
Restarts auto-negotiation on the specified Ethernet device, if
auto-negotiation is enabled.
.TP
.B \-S \-\-statistics
Queries the specified network device for NIC- and driver-specific
statistics.
.TP
.B \-t \-\-test
Executes adapter selftest on the specified network device. Possible test modes are:
.TP
.RI \*(SD
defines test type: 
.B offline
(default) means to perform full set of tests possibly causing normal operation interruption during the tests,
.B online
means to perform limited set of tests do not interrupting normal adapter operation,
.B external_lb
means to perform external-loopback test in addition to other offline tests.
.TP
.B \-s \-\-change
Allows changing some or all settings of the specified network device.
All following options only apply if
.B \-s
was specified.
.TP
.BI speed \ N
Set speed in Mb/s.
.B ethtool
with just the device name as an argument will show you the supported device speeds.
.TP
.A2 duplex half full
Sets full or half duplex mode.
.TP
.A4 port tp aui bnc mii fibre
Selects device port.
.TP
.A2 autoneg on off
Specifies whether autonegotiation should be enabled. Autonegotiation 
is enabled by default, but in some network devices may have trouble
with it, so you can disable it if really necessary. 
.TP
.BI advertise \ N
Sets the speed and duplex advertised by autonegotiation.  The argument is
a hexadecimal value using one or a combination of the following values:
.TS
nokeep;
lB	l	lB.
0x001	10 Half
0x002	10 Full
0x004	100 Half
0x008	100 Full
0x010	1000 Half	(not supported by IEEE standards)
0x020	1000 Full
0x8000	2500 Full	(not supported by IEEE standards)
0x1000	10000 Full
0x20000	20000MLD2 Full	(not supported by IEEE standards)
0x40000	20000KR2 Full	(not supported by IEEE standards)
.TE
.TP
.BI phyad \ N
PHY address.
.TP
.A2 xcvr internal external
Selects transceiver type. Currently only internal and external can be
specified, in the future further types might be added.
.TP
.BR wol \ \*(WO
Sets Wake-on-LAN options.  Not all devices support this.  The argument to 
this option is a string of characters specifying which options to enable.
.TS
nokeep;
lB	l.
p	Wake on PHY activity
u	Wake on unicast messages
m	Wake on multicast messages
b	Wake on broadcast messages
a	Wake on ARP
g	Wake on MagicPacket\[tm]
s	Enable SecureOn\[tm] password for MagicPacket\[tm]
d	T{
Disable (wake on nothing).  This option clears all previous options.
T}
.TE
.TP
.B sopass \*(MA\c
Sets the SecureOn\[tm] password.  The argument to this option must be 6
bytes in Ethernet MAC hex format (\*(MA).
.PP
.BI msglvl \ N
.br
.BI msglvl \ type
.A1 on off
.RB ...
.RS
Sets the driver message type flags by name or number. \fItype\fR
names the type of message to enable or disable; \fIN\fR specifies the
new flags numerically. The defined type names and numbers are:
.TS
nokeep;
lB	l	l.
drv	0x0001  General driver status
probe	0x0002  Hardware probing
link	0x0004  Link state
timer	0x0008  Periodic status check
ifdown	0x0010  Interface being brought down
ifup	0x0020  Interface being brought up
rx_err	0x0040  Receive error
tx_err	0x0080  Transmit error
tx_queued	0x0100  Transmit queueing
intr	0x0200  Interrupt handling
tx_done	0x0400  Transmit completion
rx_status	0x0800  Receive completion
pktdata	0x1000  Packet contents
hw	0x2000  Hardware status
wol	0x4000  Wake-on-LAN status
.TE
.PP
The precise meanings of these type flags differ between drivers.
.PD
.RE
.TP
.B \-n \-\-show\-nfc
Retrieves the receive network flow classification configurations.
.TP
.BR rx\-flow\-hash \ \*(FL
Retrieves the hash options for the specified network traffic type.
.TS
nokeep;
lB	l.
tcp4	TCP over IPv4
udp4	UDP over IPv4
ah4	IPSEC AH over IPv4
esp4	IPSEC ESP over IPv4
sctp4	SCTP over IPv4
tcp6	TCP over IPv6
udp6	UDP over IPv6
ah6	IPSEC AH over IPv6
esp6	IPSEC ESP over IPv6
sctp6	SCTP over IPv6
.TE
.TP
.B \-N \-\-config\-nfc
Configures the receive network flow classification.
.TP
.BR rx\-flow\-hash \ \*(FL \: \*(HO
Configures the hash options for the specified network traffic type.
.TS
nokeep;
lB	l.
m	Hash on the Layer 2 destination address of the rx packet.
v	Hash on the VLAN tag of the rx packet.
t	Hash on the Layer 3 protocol field of the rx packet.
s	Hash on the IP source address of the rx packet.
d	Hash on the IP destination address of the rx packet.
f	Hash on bytes 0 and 1 of the Layer 4 header of the rx packet.
n	Hash on bytes 2 and 3 of the Layer 4 header of the rx packet.
r	T{
Discard all packets of this flow type. When this option is set, all
other options are ignored.
T}
.TE
.TP
.B \-w \-\-get\-dump
Retrieves and prints firmware dump for the specified network device.
By default, it prints out the dump flag, version and length of the dump data.
When
.I data
is indicated, then ethtool fetches the dump data and directs it to a
.I file.
.TP
.B \-W \-\-set\-dump
Sets the dump flag for the device.
.TP
.B \-x \-\-show\-rxfh\-indir
Retrieves the receive flow hash indirection table.
.TP
.B \-X \-\-set\-rxfh\-indir
Configures the receive flow hash indirection table.
.TP
.BI equal\  N
Sets the receive flow hash indirection table to spread flows evenly
between the first \fIN\fR receive queues.
.TP
\fBweight\fR \fIW0 W1\fR ...
Sets the receive flow hash indirection table to spread flows between
receive queues according to the given weights.  The sum of the weights
must be non-zero and must not exceed the size of the indirection table.
.TP
.B \-f \-\-flash \ FILE
Flash firmware image from the specified file to a region on the adapter.
By default this will flash all the regions on the adapter.
.TP
.B N
A number to identify flash region where the image should be flashed.
Default region is 0 which denotes all regions in the flash.
.PD
.RE
.TP
.B \-u \-\-show\-ntuple
Get Rx ntuple filters and actions, then display them to the user.
.TP
.BI rule \ N
Retrieves the RX classification rule with the given ID.
.PD
.RE
.TP
.B \-U \-\-config\-ntuple
Configure Rx ntuple filters and actions
.TP
.BI delete \ N
Deletes the RX classification rule with the given ID.
.TP
.B flow\-type \*(NC
.TS
nokeep;
lB	l.
ether	Ethernet
ip4	Raw IPv4
tcp4	TCP over IPv4
udp4	UDP over IPv4
sctp4	SCTP over IPv4
ah4	IPSEC AH over IPv4
esp4	IPSEC ESP over IPv4
.TE
.PP
All fields below that include a mask option may either use "m" to
indicate a mask, or may use the full name of the field with a "-mask"
appended to indicate that this is the mask for a given field.
.PD
.RE
.TP
.BR src \ \*(MA\ [ m \ \*(MA]
Includes the source MAC address, specified as 6 bytes in hexadecimal
separated by colons, along with an optional mask.  Valid only for
flow-type ether.
.TP
.BR dst \ \*(MA\ [ m \ \*(MA]
Includes the destination MAC address, specified as 6 bytes in hexadecimal
separated by colons, along with an optional mask.  Valid only for
flow-type ether.
.TP
.BI proto \ N \\fR\ [\\fPm \ N \\fR]\\fP
Includes the Ethernet protocol number (ethertype) and an optional mask.
Valid only for flow-type ether.
.TP
.BR src\-ip \ \*(PA\ [ m \ \*(PA]
Specify the source IP address of the incoming packet to match along with
an optional mask.  Valid for all IPv4 based flow-types.
.TP
.BR dst\-ip \ \*(PA\ [ m \ \*(PA]
Specify the destination IP address of the incoming packet to match along
with an optional mask.  Valid for all IPv4 based flow-types.
.TP
.BI tos \ N \\fR\ [\\fPm \ N \\fR]\\fP
Specify the value of the Type of Service field in the incoming packet to
match along with an optional mask.  Applies to all IPv4 based flow-types.
.TP
.BI l4proto \ N \\fR\ [\\fPl4m \ N \\fR]\\fP
Includes the layer 4 protocol number and optional mask.  Valid only for
flow-type ip4.
.TP
.BI src\-port \ N \\fR\ [\\fPm \ N \\fR]\\fP
Specify the value of the source port field (applicable to TCP/UDP packets)
in the incoming packet to match along with an optional mask.  Valid for
flow-types ip4, tcp4, udp4, and sctp4.
.TP
.BI dst\-port \ N \\fR\ [\\fPm \ N \\fR]\\fP
Specify the value of the destination port field (applicable to TCP/UDP
packets)in the incoming packet to match along with an optional mask.
Valid for flow-types ip4, tcp4, udp4, and sctp4.
.TP
.BI spi \ N \\fR\ [\\fPm \ N \\fR]\\fP
Specify the value of the security parameter index field (applicable to
AH/ESP packets)in the incoming packet to match along with an optional
mask.  Valid for flow-types ip4, ah4, and esp4.
.TP
.BI l4data \ N \\fR\ [\\fPm \ N \\fR]\\fP
Specify the value of the first 4 Bytes of Layer 4 in the incoming packet to
match along with an optional mask.  Valid for ip4 flow-type.
.TP
.BI vlan\-etype \ N \\fR\ [\\fPm \ N \\fR]\\fP
Includes the VLAN tag Ethertype and an optional mask.
.TP
.BI vlan \ N \\fR\ [\\fPm \ N \\fR]\\fP
Includes the VLAN tag and an optional mask.
.TP
.BI user\-def \ N \\fR\ [\\fPm \ N \\fR]\\fP
Includes 64-bits of user-specific data and an optional mask.
.TP
.BI action \ N
Specifies the Rx queue to send packets to, or some other action.
.TS
nokeep;
lB	l.
-2	Clear the filter
-1	Drop the matched flow
0 or higher	Rx queue to route the flow
.TE
.TP
.BI loc \ N
Specify the location/ID to insert the rule. This will overwrite
any rule present in that location and will not go through any
of the rule ordering process.
.TP
.B \-l \-\-show\-channels
Queries the specified network device for the numbers of channels it has.
A channel is an IRQ and the set of queues that can trigger that IRQ.
.TP
.B \-L \-\-set\-channels
Changes the numbers of channels of the specified network device.
.TP
.BI rx \ N
Changes the number of channels with only receive queues.
.TP
.BI tx \ N
Changes the number of channels with only transmit queues.
.TP
.BI other \ N
Changes the number of channels used only for other purposes e.g. link interrupts or SR-IOV co-ordination.
.TP
.BI combined \ N
Changes the number of multi-purpose channels.
.SH BUGS
Not supported (in part or whole) on all network drivers.
.SH AUTHOR
.B ethtool
was written by David Miller.

Modifications by 
Jeff Garzik, 
Tim Hockin,
Jakub Jelinek,
Andre Majorel,
Eli Kupermann,
Scott Feldman,
Andi Kleen,
Alexander Duyck,
Sucheta Chakraborty.
.SH AVAILABILITY
.B ethtool
is available from
.UR http://www.kernel.org/pub/software/network/ethtool/
.UE