%% You should probably cite rfc9516 instead of this I-D.
@techreport{ietf-sfc-multi-layer-oam-18,
    number =    {draft-ietf-sfc-multi-layer-oam-18},
    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-sfc-multi-layer-oam/18/},
    author =    {Greg Mirsky and Wei Meng and Bhumip Khasnabish and Ting Ao and Kent Leung and Gyan Mishra},
    title =     {{Active OAM for Service Function Chaining}},
    pagetotal = 37,
    year =      ,
    month =     ,
    day =       ,
    abstract =  {A set of requirements for active Operation, Administration, and Maintenance (OAM) of Service Function Chains (SFCs) in a network is presented in this document. Based on these requirements, an encapsulation of active OAM messages in SFC and a mechanism to detect and localize defects are described. This document updates RFC 8300. Particularly, it updates the definition of O (OAM) bit in the Network Service Header (NSH) (RFC 8300) and defines how an active OAM message is identified in the NSH.},
}