@techreport{xu-va-tunnels-gre-00,
    number =    {draft-xu-va-tunnels-gre-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-xu-va-tunnels-gre/00/},
    author =    {Xiaohu Xu and Paul Francis},
    title =     {{GRE and IP-in-IP Tunnels for Virtual Aggregation}},
    pagetotal = 7,
    year =      2009,
    month =     feb,
    day =       11,
    abstract =  {The document "FIB Suppression with Virtual Aggregation" {[}I-D.francis-intra-va{]} describes how FIB size may be reduced. The latest revision of that draft refers generically to tunnels, and leaves it to other documents to define the usage and signaling methods for specific tunnel types. This document provides those definitions for GRE and IP-in-IP tunnels.},
}