subject: Switch Away From The Clever With The Network Loop [print this page] In the larger LAN networks often encounter network access is severely blocked, the result of this failure phenomenon for many reasons, such as network suffered a virus attack, network equipment, hardware damage occurred, the network port transport bottlenecks emerged. However, the phenomenon of network congestion from the statistical probability of view, the network changes or changes occurred in the location most likely to breakdown phenomenon, because frequent changes in network easily lead to a network loop, the network loop by the phenomenon of network congestion caused often has a strong hidden, is not conducive to the efficient rule out failure phenomenon. Then we can find a suitable way to efficiently solve network loop caused by the blocking of network access phenomenon? In fact, the ingenious circular configuration switch monitoring function, we can quickly determine whether there is the LAN network loop, as a reason behind the failure caused the network loop can be quickly resolved the situation!
Determine the network loop idea Bought because the new switches are now almost all support the monitoring function of the loopback port, clever use of this feature, we will be able to switch automatically determine the specified Communicate Port whether the phenomenon occurred in the network loop. Once we have specified Ethernet port on the loopback monitoring feature is enabled, the switch device will automatically time to scan all communication ports to monitor in order to determine whether there is network communication port loop phenomenon. If the monitoring network to a switching port is circular, the exchange port in the loop will automatically monitor the status of the port parameter settings, and in accordance with the exchange of different types of port, the switch will automatically shut off the port specified exchange or automated reporting the corresponding port of the log information in the future as long as we view the log information or the opening of the state according to the port, the LAN will be able to quickly determine whether there is the phenomenon of a network loop. Now, this type of switch on to H3CS3050 blueprint for the operation, the details of what use the loopback network loop monitoring function to judge the phenomenon of specific configuration steps.
Enabled monitoring port loopback To make the switch automatically determine the existence of the local LAN network loop phenomenon, we need to enable the switch port loop-back monitoring function, but also enable the port to monitor the controlled loop function, but in default, these features are turned off, we need to manually configure the switch to the specified port switch loopback loopback monitoring functions and ports to enable them to monitor the controlled function.
Enabled switch port loop-back monitoring functions, we can start the system Management Members of the remote log switch back permissions management interface, the interface in the command prompt, enter the string command "sys", click the Enter key, the system will switch to switch to the view state; then view state in the system, the implementation of the string command "loopback-detectionenable", this way the global port loopback switch monitoring function has been successfully enabled.
