%% You should probably cite rfc6757 instead of this I-D.
@techreport{ietf-netext-access-network-option-10,
    number =    {draft-ietf-netext-access-network-option-10},
    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-netext-access-network-option/10/},
    author =    {Sri Gundavelli and Jouni Korhonen and Mark Grayson and Kent Leung and Rajesh Pazhyannur},
    title =     {{Access Network Identifier (ANI) Option for Proxy Mobile IPv6}},
    pagetotal = 18,
    year =      2012,
    month =     apr,
    day =       25,
    abstract =  {The local mobility anchor in a Proxy Mobile IPv6 domain is able to provide access network and access operator specific handling or policing of the mobile node traffic using information about the access network to which the mobile node is attached. This specification defines a mechanism and a related mobility option for carrying the access network identifier and the access operator identification information from the mobile access gateway to the local mobility anchor over Proxy Mobile IPv6.},
}