This attribute indicates if the topology database is overloaded.
A node goes into a database overload state when it fails to store the
complete topology database due to insufficient memory in the node.
A node in this state performs resynchronization periodically by
restarting all its Neighbor Peer Finite State Machines. The node will
stay in this state until it synchronizes with all of its neighbors
without any overload problems. When this attribute is set an alarm
will be issued.