Spanning Tree Protocol

The Spanning Tree Protocol (STP) is a network protocol that ensures a loop-free topology for any bridged Ethernet local area network. The basic function of STP is to prevent bridge loops and the broadcast radiation that results from them. Spanning tree also allows a network design to include spare (redundant) links to provide automatic backup paths if an active link fails, without the danger of bridge loops, or the need for manual enabling/disabling of these backup links.

Spanning Tree Protocol (STP) is standardized as IEEE 802.1D. As the name suggests, it creates a spanning tree within a mesh network of connected layer-2 bridges (typically Ethernet switches), and disables those links that are not part of the spanning tree, leaving a single active path between any two network nodes.

STP is based on an algorithm invented by Radia Perlman while working for Digital Equipment Corporation.

Read more about Spanning Tree ProtocolProtocol Operation, Evolutions and Extensions

Other articles related to "spanning tree protocol, protocol, spanning, protocols, tree, spanning tree":

Spanning Tree Protocol - Evolutions and Extensions - Shortest Path Bridging
... existing functionalities, including Spanning Tree Protocol (STP), Multiple Spanning Tree Protocol (MSTP), Rapid Spanning Tree Protocol (RSTP), and Multiple MAC ... nature that established Ethernet as the de facto protocol at Layer 2 ...
Multicast Address - Ethernet
... address Type Field Usage 01-00-0C-CC-CC-CC 0x0802 CDP (Cisco Discovery Protocol), VTP (VLAN Trunking Protocol) 01-00-0C-CC-CC-CD 0x0802 Cisco Shared Spanning ... "slow protocols") 01-00-5E-xx-xx-xx 0x0800 IPv4 Multicast (RFC 1112) 33-33-xx-xx-xx-xx 0x86DD IPv6 Multicast (RFC 2464) ...
Network Switch - Layer-specific Functionality - Layer 2
... bridges may also interconnect using a spanning tree protocol that disables links so that the resulting local area network is a tree without loops ... In contrast to routers, spanning tree bridges must have topologies with only one active path between two points ... The older IEEE 802.1D spanning tree protocol could be quite slow, with forwarding stopping for 30 seconds while the spanning tree would reconverge ...

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