@misc{rfc4847,
    series =    {Request for Comments},
    number =    4847,
    howpublished =  {RFC 4847},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC4847},
    url =       {https://www.rfc-editor.org/info/rfc4847},
    author =    {Tomonori Takeda},
    title =     {{Framework and Requirements for Layer 1 Virtual Private Networks}},
    pagetotal = 38,
    year =      2007,
    month =     apr,
    abstract =  {This document provides a framework and service level requirements for Layer 1 Virtual Private Networks (L1VPNs). This framework is intended to aid in developing and standardizing protocols and mechanisms to support interoperable L1VPNs. The document examines motivations for L1VPNs, high level (service level) requirements, and outlines some of the architectural models that might be used to build L1VPNs. This memo provides information for the Internet community.},
}