%% You should probably cite rfc8357 instead of this I-D.
@techreport{ietf-dhc-relay-port-06,
    number =    {draft-ietf-dhc-relay-port-06},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-dhc-relay-port/06/},
    author =    {Naiming Shen and Enke Chen},
    title =     {{Generalized UDP Source Port for DHCP Relay}},
    pagetotal = 9,
    year =      2017,
    month =     aug,
    day =       28,
    abstract =  {This document proposes an extension to the DHCP protocols that allows a relay agent to receive packets from a server or an upstream relay agent on any UDP port, not just the default port 67 for IPv4 or default port 547 for IPv6.},
}