Value,Switching Granularity,Reference
0,Provided in signaling.,[RFC6004][RFC6003]
1,Ethernet Port (for port-based service),[RFC6003]
2,Ethernet Frame (for EVC-based service),[RFC6003]
3-239,Unassigned,
240-254,Reserved for Vendor-Specific Use,[RFC6003]
255,Reserved,[RFC6003]
256-65535,Not assigned at this time,[RFC6003]