@misc{rfc4667,
    series =    {Request for Comments},
    number =    4667,
    howpublished =  {RFC 4667},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC4667},
    url =       {https://www.rfc-editor.org/info/rfc4667},
    author =    {Wei Luo},
    title =     {{Layer 2 Virtual Private Network (L2VPN) Extensions for Layer 2 Tunneling Protocol (L2TP)}},
    pagetotal = 15,
    year =      2006,
    month =     sep,
    abstract =  {The Layer 2 Tunneling Protocol (L2TP) provides a standard method for setting up and managing L2TP sessions to tunnel a variety of L2 protocols. One of the reference models supported by L2TP describes the use of an L2TP session to connect two Layer 2 circuits attached to a pair of peering L2TP Access Concentrators (LACs), which is a basic form of Layer 2 Virtual Private Network (L2VPN). This document defines the protocol extensions for L2TP to set up different types of L2VPNs in a unified fashion. {[}STANDARDS-TRACK{]}},
}