%% You should probably cite rfc7710 instead of this I-D.
@techreport{wkumari-dhc-capport-16,
    number =    {draft-wkumari-dhc-capport-16},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-wkumari-dhc-capport/16/},
    author =    {Warren "Ace" Kumari and Ólafur Guðmundsson and P Ebersman and Steve Sheng},
    title =     {{Captive-Portal Identification Using DHCP or Router Advertisements (RAs)}},
    pagetotal = 8,
    year =      2015,
    month =     aug,
    day =       31,
    abstract =  {In many environments offering short-term or temporary Internet access (such as coffee shops), it is common to start new connections in a captive-portal mode. This highly restricts what the customer can do until the customer has authenticated. This document describes a DHCP option (and a Router Advertisement (RA) extension) to inform clients that they are behind some sort of captive-portal device and that they will need to authenticate to get Internet access. It is not a full solution to address all of the issues that clients may have with captive portals; it is designed to be used in larger solutions. The method of authenticating to and interacting with the captive portal is out of scope for this document.},
}