Type,Name,Meaning,Reference
0,Plain Text,Plain text key,"[RFC-ietf-tsvwg-multipath-dccp-24, Section 3.2.4]"
1-254,Unassigned,Reserved for future use,
255,Experimental,For private use only,"[RFC-ietf-tsvwg-multipath-dccp-24, Section 3.2.4]"