%% You should probably cite draft-alston-idr-crh-bgp-signalling instead of this I-D.
@techreport{alston-spring-crh-bgp-signalling-01,
    number =    {draft-alston-spring-crh-bgp-signalling-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-alston-spring-crh-bgp-signalling/01/},
    author =    {Andrew Alston and Daniam Henriques and Ron Bonica},
    title =     {{BGP Extensions for IPv6 Compressed Routing Header (CRH)}},
    pagetotal = 6,
    year =      2019,
    month =     jul,
    day =       24,
    abstract =  {This document describes a new BGP extension for signalling the mapping between Segment Identifiers (SID's), as used by a SRv6+ Compressed Routing Header (CRH) and the IPv6 Addresses they represent. The extension defines both a new optional BGP attribute to signal the Maximum SID Value (MSV) and a new Sub-Address Family (SAFI) of the IPv6 Address family.},
}