To set the txqueuelen (transmit queue length) of a network interface in Linux, you can use the ifconfig command with the txqueuelen option.
For example, to set the txqueuelen of the eth0 interface to 1000, you can use the following command:
sudo ifconfig eth0 txqueuelen 1000
The txqueuelen option specifies the maximum number of packets that can be queued for transmission on the interface. A larger txqueuelen value can improve the performance of the interface by allowing more packets to be transmitted in a single burst, but it can also increase the likelihood of network congestion.
To view the current txqueuelen value of an interface, you can use the ifconfig command without any options:
ifconfig eth0
The txqueuelen value will be displayed in the output as the TX packets value.
Keep in mind that the ifconfig command is deprecated and may not be available on all Linux systems. You can use the ip command instead:
sudo ip link set dev eth0 txqueuelen 1000
To view the current txqueuelen value using the ip command:
ip -s -d link show eth0
The txqueuelen value will be displayed in the output as the txqueuelen value.
Keep in mind that the txqueuelen setting is only one of many factors that can affect the performance of a network interface. Other factors, such as the speed and duplex settings of the interface and the network congestion, can also have an impact. You should carefully consider the optimal txqueuelen value for your specific network environment.