%% You should probably cite draft-ietf-mpls-retire-ach-tlv instead of this I-D.
@techreport{farbryantrel-mpls-retire-ach-tlv-01,
    number =    {draft-farbryantrel-mpls-retire-ach-tlv-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-farbryantrel-mpls-retire-ach-tlv/01/},
    author =    {Adrian Farrel and Stewart Bryant},
    title =     {{Retiring TLVs from the Associated Channel Header of the MPLS Generic Associated Channel}},
    pagetotal = 5,
    year =      2013,
    month =     may,
    day =       20,
    abstract =  {The MPLS Generic Associated Channel (G-ACh) is a generalization of the applicability of the Pseudowire (PW) Associated Channel Header (ACH). RFC 5586 defines the concept of Type-Length-Variable (TLV) constructs that can be carried in messages on the G-ACh by placing them in the ACH. No Associated Channel Type yet defined uses a TLV. Furthermore, it is believed that handling TLVs in hardware introduces significant problems to the fast-path, and since G-ACh messages are intended to be processed substantially in hardware, the use of TLVs in undesirable. This document updates RFC 5586 by retiring ACH TLVs and removing the associated registry.},
}