c589b6fa_pen_Shortest_Path_First__OSPF___Description
[Type #] 4 [LSA Name] ASBR-summary [Description] 
Sent by a border router that has sent a Type 5 LSA to describe how to get to that border router via the internal network.
Types of link-state advertisements (LSAs) used in Open Shortest Path First (OSPF)
Description