This read-create integer is a bit vector of administrative-group colors that must be present on every link this path traverses, meaning the intersection of a candidate link's colors and this include set must be non-null for the link to be usable. It lets an administrator steer a tunnel's path computation to only cross links tagged with specific attributes, such as a particular fiber ring or trust level. For example, setting csMplsPathInclude to select only links tagged as 'low-latency' would force the path computation to avoid slower satellite or long-haul links even if they offer a shorter hop count.