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CX11x, CX31x, CX710 (Earlier Than V6.03), and CX91x Series Switch Modules V100R001C10 Configuration Guide 13

The documents describe the configuration of various services supported by the CX11x&CX31x&CX91x series switch modules The description covers configuration examples and function configurations.
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Application Environment

Application Environment

This section describes the applicable environment of STP/RSTP.

Application of STP

On a complex network, loops are inevitable. With the requirement for network redundancy backup, network designers tend to deploy multiple physical links between two devices, one of which is the master and the others are the backup. Loops are likely or bound to occur in such a situation.

Figure 5-95 Networking diagram for a typical STP application

On the network shown in Figure 5-95, after CE and PE running STP discover loops on the network by exchanging information with each other, they trim the ring topology into a loop-free tree topology by blocking a certain port. In this manner, replication and circular propagation of packets are prevented on the network and the switching devices are released from processing duplicated packets, thereby improving their processing performance.

Updated: 2019-12-13

Document ID: EDOC1000041694

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