network traffic shaping探索Linux QoS实现网络流量整形的奥秘（linuxqos实现）

Network traffic shaping, also known as packet shaping, is the practice of managing the patterns of network traffic by dividing the network traffic between various network nodes. It is used to regulate and control the distribution of available resources through outbound and inbound communications in a manner that allows for optimal performance. This can be done by imposing rate limits or using pre-defined priorities on a particular segment of the network.

Linux QoS or Quality of Service is a technology used to shape network traffic. It works by defining different classes of traffic, such as HTTP, FTP, VoIP, email, etc, and assigning them different priorities. These priorities will determine which traffic gets preferential treatment, such as higher or lower bandwidth allocation or faster transmission speed.

Linux QoS also allows for finer control of network traffic. It supports Traffic Control, which is a system of controlling network traffic by assigning priorities to individual packets. It is possible to set up rules based on the type of traffic, destination and source IP addresses, port numbers and protocols. This allows greater control over flows, reducing latency and improving network performance.

Linux also has tools for measuring various aspects of network traffic. These tools include iproute2, which is used for inspecting, manipulating and adding routing rules; tc, which is used for traffic control; and NetEM, which is used for emulating and shaping traffic based on various parameters.

Using these tools, it is possible to create and manage network traffic shaping rules. For example, an administrator can define a rule that will limit the bandwidth of certain types of traffic, such as streaming video or internet radio. This way, the network performance is improved and other users of the network can do their job without being affected by any particular user.

Network traffic shaping is a powerful tool that can be used to improve the performance of a network. It is also a great way to ensure users can safely access the Internet without compromising their privacy or security. With the use of the right tools, network engineers can better manage their network’s traffic and make sure everyone gets their fair share of the available resources.