Use aggregate area ranges to reduce the number of link-state advertisements that are required within the area. You can also control advertisements.
default ip ospf area range {A.B.C.D} {A.B.C.D/X} { summary-link | nssa-extlink } advertise-metric
default ip ospf area range {A.B.C.D} {A.B.C.D/X} { summary-link | nssa-extlink } advertise-mode
ip ospf area range {A.B.C.D} {A.B.C.D/X} { summary-link | nssa-extlink } advertise-metric <0-65535>
ip ospf area range {A.B.C.D} {A.B.C.D/X} { summary-link | nssa-extlink } advertise-mode { summarize | suppress | no-summarize }
no ip ospf area range {A.B.C.D} {A.B.C.D/X} { summary-link | nssa-extlink }
None
VRF Router Configuration