The value of this object is an index number of a
snRtIpRipPortConfigTable row (i.e. snRtIpRipPortConfigPortIndex),
which is the selected row to copy all of its read-writable data
(i.e. snRtIpRipPortVersion and snRtIpRipPortPoisonReverse) to the
rest of the rows in snRtIpRipPortConfigTable.
Note: prior setting this object, all the intended data of the
given row of the table must be set. Otherwise, the current data
of the row will be used to set the entire ip rip port configuration
table. The previous setting will be overwritten by the new one.