Value,Description,Reference
0,Path is set up using the RSVP-TE signaling protocol,[RFC8408]
1,Traffic-engineering path is set up using Segment Routing.,[RFC8664]
2,Traffic engineering path is set up using PCECC mode,[RFC9050]
3,Traffic engineering path is set up using SRv6.,[RFC9603]
4,Native IP TE Path,[RFC9757]
5-255,Unassigned,