Editing L2TPv3 (section)

{{more references|date=March 2013}}
{{use mdy dates|date=July 2022}}
{{IPstack}}
{{short description|Third version of L2TP family}}
'''Layer 2 Tunneling Protocol version 3''' is an [[IETF]] standard related to [[Layer 2 Tunneling Protocol|L2TP]] that can be used as an alternative protocol to [[Multiprotocol Label Switching]] (MPLS) for [[encapsulation (networking)|encapsulation]] of [[Multiprotocol Encapsulation|multiprotocol]] [[Layer 2]] communications traffic over [[Internet Protocol|IP]] networks.<ref name=":0">{{cite web|website=[[Yamaha Corporation|yamaha]].com|title=RTX810 Rev.11.01.23 Release Notes|url=https://www.yamaha.com/products/en/network/download/assets/other/relnote_rtx810_11_01_23_en.txt|archive-url=https://web.archive.org/web/20210424041204/https://www.yamaha.com/products/en/network/download/assets/other/relnote_rtx810_11_01_23_en.txt|date=January 26, 2015|archive-date=April 24, 2021|url-status=live}}</ref> Like L2TP, L2TPv3 provides a [[pseudo-wire]] service, but scaled to fit carrier requirements.

L2TPv3 can be regarded as being to MPLS what IP is to [[Asynchronous Transfer Mode|ATM]]: a simplified version of the same concept, with much of the same benefit achieved at a fraction of the effort, at the cost of losing some technical features considered less important in the market. In the case of L2TPv3, the features lost are [[teletraffic engineering]] features considered important in MPLS. However, there is no reason these features could not be re-engineered in or on top of L2TPv3 in later products. The [[communications protocol|protocol]] [[Engineering overhead|overhead]] of L2TPv3 is also significantly bigger than MPLS.