The relative position of this entry within its access list. Access
list entries are searched in this sequence (low to high values) until a
match is found.
NOTE: The value zero is reserved for use with SET operations to perform
special-purpose table entry creations/deletions; see the DESCRIPTION of
usdIpAccessListRowStatus for details.
Get/GetNext/GetBulk retrievals never return an entry for which this
object is zero-valued.