CCNP ROUTE: 5.OSPF internal LSAs: LSA Type 3 - Summary LSA

-ABRs do not forward Type 1 and Type 2 LSAs from one area into another area.
-OSPF advertises interarea routes using the Type 3 summary LSA. ABRs generate a Type 3 LSA for each subnet in one area, and advertises each Type 3 LSA into the other areas.
-Type 3 summary LSAs do not contain all the detailed topology information, so in comparison to Types 1 and 2, these LSAs summarize the information–hence the name summary LSA.

Router R9 is an ABR between areas 0, 2 and 3, so it creates 3 Type 3 LSAs, one per area:
R9#show ip ospf database               

            OSPF Router with ID (9.9.9.9) (Process ID 1)
...
                Summary Net Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum
10.0.1.1        9.9.9.9         1337        0x80000001 0x00E22A
10.0.1.2        9.9.9.9         1337        0x80000001 0x005B70
10.0.1.3        9.9.9.9         1309        0x80000001 0x005179
10.0.10.10      9.9.9.9         1339        0x80000001 0x00B108
10.0.11.11      9.9.9.9         1310        0x80000001 0x009C1B
192.168.3.0     9.9.9.9         1399        0x80000001 0x00F9AB
192.168.33.33   9.9.9.9         1359        0x80000001 0x007FE2
192.168.168.0   2.2.2.2         1400        0x80000002 0x00AC6E
192.168.169.170 2.2.2.2         1351        0x80000001 0x001557
...
                Summary Net Link States (Area 2)

Link ID         ADV Router      Age         Seq#       Checksum
192.168.0.0     9.9.9.9         1389        0x80000001 0x0085E6
192.168.0.12    9.9.9.9         1389        0x80000001 0x0043E2
192.168.0.16    9.9.9.9         1390        0x80000001 0x001B07
192.168.0.20    9.9.9.9         1400        0x80000001 0x0070ED
192.168.3.0     9.9.9.9         1400        0x80000001 0x00F9AB
192.168.13.13   9.9.9.9         1350        0x80000001 0x00A7A2
192.168.33.33   9.9.9.9         1366        0x80000001 0x007FE2
192.168.100.100 9.9.9.9         1396        0x80000001 0x00198C
192.168.168.0   9.9.9.9         1356        0x80000001 0x00C2F2
192.168.169.170 9.9.9.9         1356        0x80000001 0x0029DC
...
                Summary Net Link States (Area 3)

Link ID         ADV Router      Age         Seq#       Checksum
0.0.0.0         9.9.9.9         1411        0x80000001 0x002AE7

Note: Link ID 0.0.0.0 refers to the default route of router R12 in area 3:
R12#show ip route
...
O*IA 0.0.0.0/0 [110/11] via 192.168.3.1, 00:28:59, FastEthernet0/0

Routers which are not ABRs will have information about networks outside their area:
R5#show ip ospf database 

            OSPF Router with ID (5.5.5.5) (Process ID 1)
...
                Summary Net Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum
10.0.1.1        9.9.9.9         276         0x80000002 0x00E02B
10.0.1.2        9.9.9.9         276         0x80000002 0x005971
10.0.1.3        9.9.9.9         276         0x80000002 0x004F7A
10.0.10.10      9.9.9.9         279         0x80000002 0x00AF09
10.0.11.11      9.9.9.9         279         0x80000002 0x009A1C
192.168.3.0     9.9.9.9         279         0x80000002 0x00F7AC
192.168.33.33   9.9.9.9         279         0x80000002 0x007DE3
192.168.168.0   2.2.2.2         293         0x80000003 0x00AA6F
192.168.169.170 2.2.2.2         293         0x80000002 0x001358

R5#show ip ospf database summary 10.0.1.1

            OSPF Router with ID (5.5.5.5) (Process ID 1)

                Summary Net Link States (Area 0)

  Routing Bit Set on this LSA
  LS age: 573
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 10.0.1.1 (summary Network Number)
  Advertising Router: 9.9.9.9
  LS Seq Number: 80000002
  Checksum: 0xE02B
  Length: 28
  Network Mask: /32
        TOS: 0  Metric: 0