%% You should probably cite draft-ietf-mip6-ha-switch instead of this I-D.
@techreport{haley-mip6-ha-switch-01,
    number =    {draft-haley-mip6-ha-switch-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-haley-mip6-ha-switch/01/},
    author =    {Brian Haley},
    title =     {{Mobility Header Home Agent Switch Message}},
    pagetotal = 11,
    year =      2006,
    month =     mar,
    day =       20,
    abstract =  {This document specifies a new Mobility Header message type that can be used between a home agent and mobile node to signal a mobile node that it should acquire a new home agent.},
}