%% You should probably cite draft-ietf-pwe3-redundancy-spe instead of this I-D.
@techreport{dong-pwe3-redundancy-spe-04,
    number =    {draft-dong-pwe3-redundancy-spe-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-dong-pwe3-redundancy-spe/04/},
    author =    {Jie Dong and Haibo Wang},
    title =     {{Pseudowire Redundancy on S-PE}},
    pagetotal = 8,
    year =      2012,
    month =     nov,
    day =       21,
    abstract =  {This document describes Multi-Segment Pseudowire (MS-PW) protection scenarios in which the pseudowire redundancy is provided on the Switching-PE (S-PE). Operations of the S-PEs which provide PW redundancy are specified. Signaling of the preferential forwarding status as defined in {[}I-D.ietf-pwe3-redundancy-bit{]} is reused. This document does not require any change to the T-PEs of MS-PW.},
}