What is the spanning tree protocol?

network devices that act as Open Systems InterConnection (OSI) Model model Layer Two Bridging, including switches, are often redundant to prevent network failure. Spanning Tree (STP) is a set of rules, methods and communication functions that are implemented in Bridge software that prevent the infinite repetition of the frames of the data connection layer in the redundant topology of the bridge. The Spanning Tree protocol is a data connection layer protocol that sets up a unique and lowest freight route for traveling from any bridged network endpoint to the other.

Bridges that use the Spanning Tree protocol send special messages called Bridge Protocol Data Units (BPDUS) to share information and inform each other about the changes in network. Most bridges participate in the Spanning Tree process, but network administrators could determine some bridges as a device only. All bridges of a device that actively use the grace of PR PROutcoiler NG BPDUS tree to create and maintain tree topology without loop.

StP initiates recoporing new tree topology for bridging whenever the bridges are added or removed from the network when the tracks fail in the network when detection of indirect connection (UDLD) detects a broken fiber or other topological changes and disrupts the established data flow. Bridges that actively use the Spanning Tree tree protocol begin with topological reconfiguration by first agreeing and marking one of the overwhelmed devices as the root node for the new Spanning tree. They then work together by sending each other a BPDU that contains up -to -date information and the cost of the journey to calculate the new tree with the lowest cost of topology. As soon as bridges agree on new topology, bridge ports associated with redundant segments that are part of the new spanning tree and is not withThe part of the designated Etherchannel is temporarily blocked to prevent data traffic from being transferred. Blocking these unused redundant paths creates a loop without a loop.

Spanning Tree was first developed and implemented by Digital Equipment Corporation (DEC). Shortly thereafter, the Institute of Electrical and Electronics Engineers (IEEE) 802.1d was incorporated. The newer and faster version of the Spanning Tree protocol called Rapid Spanning Tree Protocol (RSTP) was introduced by IEEE 802.1W. RSTP replaced the STP as a standard protocol for bridging without a loop and was marked as a selection protocol in the revised IEEE 802.1-2004 standard. The STP was further enhanced by the issue of multiple Spanning Tree Protocol (MSTP), as shown in detail in IEE 802.1Q-2005, allowing separate instances to coexist in multiple virtual local areas of the network.