Detecting Data-Plane Failures in Point-to-Multipoint MPLS - Extensions to LSP Ping. - Shaleen Saxena; George Swallow; Zafar Ali; Adrian Farrel; Seisho Yasukawa; Thomas D. Nadeau (RFC, 2011)

Definition of Time to Live TLV for LSP-Ping Mechanisms. - Sami Boutros; Siva Sivabalan; George Swallow; Shaleen Saxena; Vishwas Manral; Sam Aldrin (RFC, 2014)