%% You should probably cite rfc6720 instead of this I-D. @techreport{ietf-mpls-ldp-gtsm-05, number = {draft-ietf-mpls-ldp-gtsm-05}, 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-mpls-ldp-gtsm/05/}, author = {Carlos Pignataro and Rajiv Asati}, title = {{The Generalized TTL Security Mechanism (GTSM) for Label Distribution Protocol (LDP)}}, pagetotal = 9, year = 2012, month = apr, day = 11, abstract = {The Generalized TTL Security Mechanism (GTSM) describes a generalized use of a packets Time to Live (TTL) (IPv4) or Hop Limit (IPv6) to verify that the packet was sourced by a node on a connected link, thereby protecting the router's IP control-plane from CPU utilization based attacks. This technique improves security and is used by many protocols. This document defines the GTSM use for Label Distribution Protocol (LDP). This specification uses a bit reserved in RFC 5036 and therefore updates RFC 5036.}, }