To add a new entry to the tacacsServerTable, set
this object to primary(2) or other(3) for an IP
address which is not already in the table. The
primary entry will be used first, if it is
reachable. Otherwise, one of the other entries
will be used. Setting one entry to primary(2)
causes any previous primary entry to change to
other(3). To remove an entry from the table, set
this object to invalid(1).