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IEEE 802.1D is the Ethernet MAC bridges standard which includes bridging, Spanning Tree Protocol and others. It is standardized by the IEEE 802.1 working group. It includes details specific to linking many of the other 802 projects including the widely deployed 802.3 (Ethernet), 802.11 (Wireless LAN) and 802.16 (WiMax) standards.
The original Perlman-inspired Spanning Tree Protocol, called DEC STP, is not a standard and differs from the IEEE version in message format as well as timer settings. Some bridges implement both the IEEE and the DEC versions of the Spanning Tree Protocol, but their interworking can create issues for the network administrator. [16]
Common Spanning Tree (CST): Administers the connectivity among MST regions, STP LANs and RSTP LANs in a bridged network. Common Internal Spanning Tree (CIST): Identifies regions in a network and administers the CIST root bridge for the network, for each region and for each spanning tree instance in each region. It's also the default spanning ...
802.1D-1998: MAC Bridges (rollup of 802.1D-1990, 802.1j, 802.6k, P802.12e and P802.1p) Superseded by 802.1D-2004 P802.1r GARP Proprietary Attribute Registration Protocol (GPRP) Withdrawn 802.1t-2001 Technical and Editorial corrections for 802.1D-1998 Incorporated into 802.1D-2004 802.1w-2001: Rapid Reconfiguration of Spanning Tree Incorporated ...
Perlman invented the spanning tree algorithm and protocol. While working as a consulting engineer at Digital Equipment Corporation (DEC) in 1984 she was tasked with developing a straightforward protocol that enabled network bridges to locate loops in a local area network (LAN). It was required that the protocol should use a constant amount of ...
IEEE 802.1aq is an amendment to the IEEE 802.1Q networking standard which adds support for Shortest Path Bridging (SPB).This technology is intended to simplify the creation and configuration of Ethernet networks while enabling multipath routing.
Spanning-Tree Protocol (STP) resolves redundant physical topology into a loop-free, tree-like forwarding topology via blocking one or more ports. However, Unidirectional Link failure can cause "traffic blackholing" and loops in the Switch topology.
IEEE 802 is a family of Institute of Electrical and Electronics Engineers (IEEE) standards for local area networks (LANs), personal area networks (PANs), and metropolitan area networks (MANs). The IEEE 802 LAN/MAN Standards Committee (LMSC) maintains these standards.