The maximum number of non-default
AS-external LSAs entries that can be stored in the
link state database. If the value is -1, then
there is no limit.
When the number of non-default AS-external LSAs
in a router's link state database reaches
ospfExtLsdbLimit, the router enters
overflow state. The router never holds more than
ospfExtLsdbLimit non-default AS-external LSAs
in its database. OspfExtLsdbLimit MUST be set
identically in all routers attached to the OSPF
backbone and/or any regular OSPF area (i.e.,
OSPF stub areas and NSSAs are excluded).
This object is persistent and when written
the entity SHOULD save the change to non-volatile
storage.