QoS Flow control management detailed!

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More and more routers are bringing this function of QoS. As Network management personnel. The word QOS has more and more appeared in our ears. What exactly is QoS flow control. We're here today. Learn . In simple terms. QOS is used to resolve problems such as bandwidth resolution network latency and congestionTechnology。 Take the sea spider as an example: In general it contains priority (packet priority, ip/network segment priority, port priority, residual bandwidth preemption priority), flexible bandwidth management, and so on. Small Packet Priority: Packets usually refer to packages less than 64K, such as ping packages. Request packages, response packs, and so on. In the process of surfing the Internet. There will be many requests, responses. When these packages are given priority, they will give us a much quicker feeling. ip/ Network Segment Preferred: Available for source IP, destination IP. or paragraph to set the priority level. Like what. The local area network. I first guarantee the bandwidth of my web server. Then ensure the client's bandwidth, and then ensure the server's bandwidth. can be set. Port Priority: The priority level can be set for the source port and destination port. Generally speaking. Internet cafes are mainly playing games. Then I can target some of the major game ports. Prioritize the bandwidth of these games. remaining bandwidth preemption priority: As the name implies refers to in use. When the bandwidth of the network has surplus. The remaining bandwidth can be allocated to certain IP, some ports. In this way, you can make full use of bandwidth. And not waste. Flexible Bandwidth Management： Take the download speed limit for example, for example, the total bandwidth is 10Mbit (the total maximum download speed is 1000kbytes/s). A total of 20 people use, speed limit to ensure that the download speed 100kbytes/s, the maximum download speed 200kbytes/s. The following is elaborated in detail: 1, the bandwidth is idle, the speed can achieve "maximum speed" If the bandwidth is available (less people on the Internet, bandwidth usage is around 50%, such as only 10 people online), the download speed can reach 200K, 200K is the peak speed of download, even if the bandwidth is only one person in use, will not exceed this peak speed. 100K inside this 200K is temporarily borrowed from others, when others need, will automatically retreat out. 2, bandwidth has a certain rate of use, speed in the "Guaranteed speed" and "maximum speed" between If the bandwidth has a certain rate of use (a certain number of Internet users, bandwidth utilization rate of 80%, such as 15 people online), the download speed will be reduced to "guarantee download speed" and "Maximum download speed" between, that is, 100K ~ 200K. This is usually the case in the majority. 3, the bandwidth usage is high or all use, the speed is equal to or less than "guaranteed speed" If the bandwidth usage is higher (the number of people on the Internet is greater, bandwidth usage in more than 90%, such as 20 people all on-line, the download speed will not exceed 100K, that is: if the total bandwidth can not meet each person to achieve "guaranteed speed", then the end of each person's speed will be less than "guaranteed speed" (after the average distribution). For example, if 20 people are all downloaded at the same time, the total download speed of the 1000kbytes/s, that is, 50K per person. In addition, there is often a global bandwidth setting. This is used to count your total bandwidth. If you do not set the words. Routing does not compute your total bandwidth, nor does it have flexible bandwidth management, and so on. So in QoS. The global settings must be set. And. The best is the real bandwidth. Don't be too small, not too big. This article from the "Invincible Old cat" blog, please be sure to keep this source http://yutianxuan.blog.51cto.com/481756/100348 this article from 51CTO. COM Technology Blog