%% You should probably cite draft-bpw-pcp-dhcp instead of this I-D.
@techreport{bpw-softwire-pcp-dhcp-01,
    number =    {draft-bpw-softwire-pcp-dhcp-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-bpw-softwire-pcp-dhcp/01/},
    author =    {Mohamed Boucadair and Reinaldo Penno and Dan Wing},
    title =     {{DHCP and DHCPv6 Options for Port Control Protocol (PCP)}},
    pagetotal = 13,
    year =      2010,
    month =     may,
    day =       10,
    abstract =  {This document specifies DHCP (IPv4 and IPv6) Options to convey the IP address or a FQDN of a PCP Server. A dedicated option to prevent overloading PCP Servers is also specified.},
}