# IEEE 802.1D

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{{Short description|Standard which includes bridging, Spanning Tree Protocol and others}}

'''IEEE 802.1D''' is the [Ethernet](/source/Ethernet) [MAC bridge](/source/MAC_bridge)s standard which includes [bridging](/source/Bridging_(networking)), [Spanning Tree Protocol](/source/Spanning_Tree_Protocol) and others. It is standardized by the [IEEE 802.1](/source/IEEE_802.1) working group.  It includes details specific to linking many of the other 802 projects including the widely deployed [802.3](/source/802.3) (Ethernet), [802.11](/source/802.11) (Wireless LAN) and [802.16](/source/802.16) (WiMax) standards.

Bridges using [virtual LAN](/source/virtual_LAN)s (VLANs) have never been part of 802.1D, but were instead specified in separate standard, [802.1Q](/source/IEEE_802.1Q) originally published in 1998.

By 2014, all the functionality defined by IEEE 802.1D has been incorporated into either [IEEE 802.1Q-2014](/source/IEEE_802.1Q) (Bridges and Bridged Networks) or IEEE 802.1AC (MAC Service Definition).  802.1D is expected to be officially withdrawn in 2022.<ref>{{cite web|url=https://grouper.ieee.org/groups/802/1/files/public/docs2020/admin-draft-liaison-template-8021D-withdrawal-1120-v01.pdf|title=Withdrawal of IEEE Std 802.1D-2004|date=10 November 2020|website=[IEEE](/source/IEEE)|access-date=13 September 2023}}</ref>{{needs update|date=May 2024}}

Publishing history:

* 1990&nbsp;— Original publication (802.1D-1990).
* 1993&nbsp;— standard ISO/IEC 10038:1993.
* 1998&nbsp;— Revised version (802.1D-1998, ISO/IEC 15802-3:1998), incorporating the extensions [P802.1p](/source/IEEE_802.1p), P802.12e, 802.1j-1996 and 802.6k-1992.
* 2004&nbsp;— Revised version (802.1D-2004), incorporating the extensions 802.11c-1998, 802.1t-2001, [802.1w-2001](/source/802.1w), and removing the original [Spanning Tree Protocol](/source/Spanning_Tree_Protocol), instead incorporating the [Rapid Spanning Tree Protocol](/source/Rapid_Spanning_Tree_Protocol) (RSTP) from [802.1w-2001](/source/802.1w).
* Amendments to 802.1D-2004:
** 2004&nbsp;— Small amendment (802.17a-2004) to add in [802.17](/source/802.17) bridging support.<ref>[https://ieeexplore.ieee.org/document/1355861 802.17a-2004]</ref>
** 2007&nbsp;— Small amendment (802.16k-2007) to add in [802.16](/source/802.16) bridging support.<ref>[https://ieeexplore.ieee.org/document/4293121 802.16k-2007]</ref>
* 2012&nbsp;— Shortest Path Bridging ([IEEE 802.1aq-2012](/source/IEEE_802.1aq), amendment to 802.1Q-2011).

==See also==
*[Multiple Spanning Tree Protocol](/source/Multiple_Spanning_Tree_Protocol)
*[Spanning Tree Protocol](/source/Spanning_Tree_Protocol)
*[TRILL](/source/TRILL){{snd}}Transparent Interconnection of Lots of Links

==References==
{{reflist}}
{{refbegin|}}
*[https://ieeexplore.ieee.org/document/1309630 802.1D-2004 - IEEE Standard for Local and metropolitan area networks: Media Access Control (MAC) Bridges]
*[https://web.archive.org/web/20070815225446/http://standards.ieee.org/cgi-bin/status?Designation:%20802.1D 802.1D Status]
{{refend}}

{{IEEE standards}}

IEEE 802.01D
Category:Ethernet standards

{{network-stub}}

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Adapted from the Wikipedia article [IEEE 802.1D](https://en.wikipedia.org/wiki/IEEE_802.1D) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/IEEE_802.1D?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.