Spec Name,IANA Name,BIT Position,Description,Reference
S,ECM-S,4,Security Bit,[RFC9301]
D,ECM-D,5,LISP-DDT Bit,[RFC9301]
E,ECM-E,6,Forward to ETR Bit,[RFC9301]
M,ECM-M,7,Destined to Map-Server Bit,[RFC9301]