Brief Introduction to vswitch and fault repair

Vswitch failure-concept of low Packet Loss Rate

Data is divided into data packets for transmission in the network. Each data packet contains information indicating the data and a token that provides data routing. Www.cqpcwx.com, and packet propagation in the general media is a small part of the total because the two final ends are lost after the gap, and most of the data packets will arrive at the destination terminal. The so-called network packet loss rate is the ratio of the packet loss part to the total number of transmitted packets. During normal transmission, the network packet loss rate should be controlled within a certain range. In cmd, type ping [url] and the last line (x % loss) is the packet loss rate of the target address ping package.

Steps for solving vswitch faults

The problem we want to solve this time is that the user's computer packet loss is serious, and sometimes the user's normal internet access is affected. The solution is to find the problem from the bottom up by the user's computer.

Switch Fault Determination by step

(1) Causes of packet loss on the PC caused by preference:

1. Whether the computer Nic is damaged;

2. Whether the RJ45 header is damaged or the line is incorrect;

3. Whether the network cable is damaged;

4. device faults;

Next, use the user's computer, Type ipconfig in cmd, and the Default Gateway of the network is displayed. ping 192.168.0.2-t to obtain a high packet loss rate, as shown in figure 3.

After the above information is obtained, in order to eliminate the fault point, ping 192.168.0.2 from the notebook you carried with you, and the result is still 3. First, you can eliminate the fault that is not the user's computer Nic. Then, check whether the user's crystal head is standardized. In order to be safe, cut off the crystal head and create a new crystal head again, but the fault remains. At this time, we need to find a question from the user's machine, that is, the method of finding the question.

In order to be able to quickly locate the user's network cable in a 24 * switch, we need the user's help to keep working on pulling and inserting the network cable from the network port, I can see at the switch indicator light that a light is off. Note that the light is off rather than flashing. The above method can be used to determine the port number of the vswitch connected to the user, disconnect the network cable from the switch, connect 7 ports at one end of the direct line, and switch the laptop at one end, still packet loss, in this way, the problem of network cable can be ruled out.

It should be noted that the number of Internet users reported for this repair is extremely small, indicating that most users in this network can access the Internet normally. Find the idle port of the switch and connect it with one end of the direct connection line, one end is connected to the test notebook. The purpose is to test that port is in good condition through this step. If this is not the case, try the next one, and so on, and find a good port, test the port as much as possible for a while. In order to save time to test the port, you can always run the ping packet command. After figure 4 appears, it can be determined that the port can be used normally.

To ensure the normal use of the port, You can ping the port for a period of time, as shown in Figure 5. You can insert the network cable used for this repair into the tested port and add a label to facilitate the next repair. Then, run the cmd command on the user's computer, ping192.168.02-t: The network is normal and the ping packet is normal. The repair work has been completed.

Summary of switch faults

The failure of the switch port is due to the aging of the switch's own performance, which means that the faulty switch does suffer a decline in hardware performance, therefore, serious packet loss occurs on the Internet. To sum up this work, you should be careful, accumulate more in your daily work, and summarize more. The next time you see such a question, you can quickly find the point where the question is located, and quickly solve the problem!