%% You should probably cite draft-rfernando-bess-service-chaining instead of this I-D.
@techreport{rfernando-l3vpn-service-chaining-03,
    number =    {draft-rfernando-l3vpn-service-chaining-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-rfernando-l3vpn-service-chaining/03/},
    author =    {Rex Fernando and Dhananjaya Rao and Luyuan Fang and Maria Napierala and Ning So and Adrian Farrel},
    title =     {{Virtual Topologies for Service Chaining in BGP/IP MPLS VPNs}},
    pagetotal = 15,
    year =      2013,
    month =     oct,
    day =       21,
    abstract =  {This document presents techniques built upon BGP/IP MPLS VPN control plane mechanisms to construct virtual topologies for service chaining. These virtual service topologies interconnect network zones and constrain the flow of traffic between these zones via a sequence of service nodes so that service functions can be applied to the traffic. This document also describes approaches enabled by both the routing control plane and by network orchestration to realize these virtual service topologies.},
}