@techreport{ietf-ppvpn-hiervpn-corevpn-00,
    number =    {draft-ietf-ppvpn-hiervpn-corevpn-00},
    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-ppvpn-hiervpn-corevpn/00/},
    author =    {Andrew G. Malis and Chandrasekar Kathirvelu and Fred Ammann and Karthik Muthukrishnan},
    title =     {{Hierarchical VPN over MPLS Transport

}},
    pagetotal = 9,
    year =      2001,
    month =     jul,
    day =       27,
    abstract =  {This memo presents an approach for building hierarchical Virtual Private Network (VPN) services. This approach uses Multiprotocol Label Switching (MPLS). The central vision is for the service provider to provide a virtual router service to other SPs without participating in VPNs of those SPs},
}