Depending on the modifyType, this attribute describes the route of a new protection leg or the whole SNC.
When it describes a segment to be added, either the SNCP cross-connects or the switch TPs that will be changed in the segment may be specified by the NMS. The EMS then chooses the missing segments. Alternatively, the NMS may specify the full route.

Readable by NMS? No
Writeable by NMS? Yes
Invariant? Yes
