@misc{rfc4840,
    series =    {Request for Comments},
    number =    4840,
    howpublished =  {RFC 4840},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC4840},
    url =       {https://www.rfc-editor.org/info/rfc4840},
    author =    {Dr. Bernard D. Aboba and Elwyn B. Davies and Dave Thaler and Elwyn B. Davies},
    title =     {{Multiple Encapsulation Methods Considered Harmful}},
    pagetotal = 27,
    year =      2007,
    month =     apr,
    abstract =  {This document describes architectural and operational issues that arise from link-layer protocols supporting multiple Internet Protocol encapsulation methods. This memo provides information for the Internet community.},
}