%% You should probably cite draft-ietf-dhc-access-network-identifier instead of this I-D.
@techreport{bhandari-dhc-access-network-identifier-01,
    number =    {draft-bhandari-dhc-access-network-identifier-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-bhandari-dhc-access-network-identifier/01/},
    author =    {Shwetha Bhandari and Sri Gundavelli and Jouni Korhonen and Mark Grayson},
    title =     {{Access-Network-Identifer Option in DHCP}},
    pagetotal = 15,
    year =      2012,
    month =     aug,
    day =       23,
    abstract =  {This document specifies the format and mechanism that is to be used for encoding access network identifiers in DHCPv4 and DHCPv6 messages by defining new access network identifier options and sub-options.},
}