%% You should probably cite draft-ietf-pcp-dhcp instead of this I-D.
@techreport{bpw-pcp-dhcp-04,
    number =    {draft-bpw-pcp-dhcp-04},
    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-pcp-dhcp/04/},
    author =    {Mohamed Boucadair and Reinaldo Penno and Dan Wing},
    title =     {{DHCP and DHCPv6 Options for the Port Control Protocol (PCP)}},
    pagetotal = 12,
    year =      2011,
    month =     apr,
    day =       27,
    abstract =  {This document specifies DHCP (IPv4 and IPv6) options to configure hosts with Port Control Protocol (PCP) Server addresses. The use of IPv4 DHCP or DHCPv6 depends on the PCP deployment scenario.},
}