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Configures network driver, hardware and Netfilter settings.
Dynamic change of the interface speed according to the interface
utilization is also supported. The dynamic tuning is controlled by
the [option]`dynamic` and the global [option]`dynamic_tuning`
option in `tuned-main.conf`.
`wake_on_lan`:::
The [option]`wake_on_lan` option sets wake-on-lan to the specified
value as when using the `ethtool` utility.
+
.Set Wake-on-LAN for device eth0 on MagicPacket(TM)
====
----
[net]
devices=eth0
wake_on_lan=g
----
====
`coalesce`:::
The [option]`coalesce` option allows changing coalescing settings
for the specified network devices. The syntax is:
+
[subs="quotes"]
----
coalesce=__param1__ __value1__ __param2__ __value2__ ... __paramN__ __valueN__
----
+
Note that not all the coalescing parameters are supported by all
network cards. For the list of coalescing parameters of your network
device, use `ethtool -c device`.
+
.Setting coalescing parameters rx/tx-usecs for all network devices
====
----
[net]
coalesce=rx-usecs 3 tx-usecs 16
----
====
`features`:::
The [option]`features` option allows changing
the offload parameters and other features for the specified
network devices. To query the features of your network device,
use `ethtool -k device`. The syntax of the option is the same as
the [option]`coalesce` option.
+
.Turn off TX checksumming, generic segmentation and receive offload
====
----
[net]
features=tx off gso off gro off
----
====
`pause`:::
The [option]`pause` option allows changing the pause parameters for
the specified network devices. To query the pause parameters of your
network device, use `ethtool -a device`. The syntax of the option
is the same as the [option]`coalesce` option.
+
.Disable autonegotiation
====
----
[net]
pause=autoneg off
----
====
`ring`:::
The [option]`ring` option allows changing the rx/tx ring parameters
for the specified network devices. To query the ring parameters of your
network device, use `ethtool -g device`. The syntax of the option
is the same as the [option]`coalesce` option.
+
.Change the number of ring entries for the Rx/Tx rings to 1024/512 respectively
=====
-----
[net]
ring=rx 1024 tx 512
-----
=====
`channels`:::
The [option]`channels` option allows changing the numbers of channels
for the specified network device. A channel is an IRQ and the set
of queues that can trigger that IRQ. To query the channels parameters of your
network device, use `ethtool -l device`. The syntax of the option
is the same as the [option]`coalesce` option.
+
.Set the number of multi-purpose channels to 16
=====
-----
[net]
channels=combined 16
-----
=====
+
A network device either supports rx/tx or combined queue
mode. The [option]`channels` option automatically adjusts the
parameters based on the mode supported by the device as long as a
valid configuration is requested.
`nf_conntrack_hashsize`:::
The [option]`nf_conntrack_hashsize` option sets the size of the hash
table which stores lists of conntrack entries by writing to
`/sys/module/nf_conntrack/parameters/hashsize`.
+
.Adjust the size of the conntrack hash table
====
----
[net]
nf_conntrack_hashsize=131072
----
====
`txqueuelen`:::
The [option]`txqueuelen` option allows changing txqueuelen (the length
of the transmit queue). It uses `ip` utility that is in package iproute
recommended for TuneD, so the package needs to be installed for its correct
functionality. To query the txqueuelen parameters of your network device
use `ip link show` and the current value is shown after the qlen column.
+
.Adjust the length of the transmit queue
====
----
[net]
txqueuelen=5000
----
====
`mtu`:::
The [option]`mtu` option allows changing MTU (Maximum Transmission Unit).
It uses `ip` utility that is in package iproute recommended for TuneD, so
the package needs to be installed for its correct functionality. To query
the MTU parameters of your network device use `ip link show` and the
current value is shown after the MTU column.
+
.Adjust the size of the MTU
====
----
[net]
mtu=9000
----
====
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