Understand the troubleshooting of transceiver and switch ports through loopback test | |
Added:2022-07-05 Reading times: | |
In the field of telecommunications testing, applications can be completed through various processes and tools, such as optical power meter, OTDR, visual fault locator and so on. As we all know, loopback cable can be used as a testing tool in telecommunications. In this process, we transmit electronic signals without any modification or processing. Therefore, the transmission and return signals are then diagnosed to debug any physical connection problems. Loopback is a simple and effective method to test the capability of any network device. However, it is mainly used for optical fiber testing applications and network recovery. Optical fiber loopback test To perform fiber loopback test, it involves communication equipment such as switches and transceivers. Two optical fiber connectors are inserted into the output (transmit) and input (receive) ports of the transceiver. If the transceiver works normally and the switch is configured correctly, the loopback test can diagnose the transceiver. In order to maintain and realize the normal operation of the transceiver, this test is a convenient method. Steps for loopback test Basically, there are two types of tests that can troubleshoot transceiver and switch ports: Single port test dual port test To carry out these tests, the following items need to be prepared: Two transceivers, such as 10gspf+sr transceivers. 1 simplex optical fiber cable. 1 duplex optical fiber cable. 1pc switch,. Two piece loopback cable, such as LC or SC loopback cable. Let's look at the steps to perform a single port loopback test Use a simplex fiber optic cable or loopback cable to connect the transceiver. This step helps us check whether the port and transceiver are normal. Check the software version of the switch in use. Check the status of all ports on the switch by checking the interface status. Check the working status of the port we are connecting to, as shown in the following figure: port 30. Check the digital diagnostic monitoring (DDM) information to see the status of the transceiver. Now let's take a look at the steps of conducting a dual port loopback test This time, connect two transceivers with one duplex optical fiber cable or two loopback cables. This step can help us check whether the data rate of the port and the transceiver is the same, and also help us understand whether the link is normal. Check the status of all ports on the switch by viewing the interface status. Check the working status of the two ports we are connecting, as shown in the following figure: ports 30 and 32. Check the digital diagnostic monitoring (DDM) information to see the normal working status of the transceiver. Understand troubleshooting of transceiver and switch ports |
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