The network protocol STP, also known as Spanning Tree Protocol. The emergence of this protocol mainly solves the problem of redundant links forming loops in the network. As a terminal device for network communication, OLT inevitably encounters physical network loop issues in the network topology layout. At the same time, due to the physical presence of network loop issues, it is difficult to identify which part of the network equipment is causing the loop problem.
The STP protocol is to generate a logical tree structure by logically blocking some ports in a network with physical loops through an algorithm.
As shown in the above figure, there are three switches in the network topology diagram, and there are physical loop issues with the three switches in the network layout. As long as the STP function is enabled on the switch, the switch selects which physical link port to block based on protocol rules.
All network device protocol communication in the network is basically achieved through message interaction. STP uses BPDU (Bridge Protocol Data Unit) to inform which switch's communication port needs to be blocked. The use of STP function can not only block the Link 1 communication port of the switch, but also use the Link 1 communication port as a backup port. However, when Link 3 is unable to communicate, the Link 1 port is activated to ensure normal network communication.
In today's network environment, due to the complexity of the network environment, STP has become an indispensable function for office devices such as switches and OLTs. In order to meet the needs of the market and meet the network application requirements of customers, RSTP has emerged as an upgraded version of STP functionality. Compared with STP, RSTP can quickly migrate in terms of functionality, and the speed and efficiency of network convergence are better than STP. At the same time, RSTP can be compatible with STP, that is, two switches in the network, one running STP and the other running RSTP. The function can still be achieved, but the switch running RSTP will automatically change to running STP.
The above is a brief overview of network protocol STP software technology, which can serve as a reference for everyone. Our company has a strong software and hardware technical team, which can provide professional technical services to customers. Our best-selling products cover various types of switches and OLT series products. If you need, you can further understand.