Router_D#show ip ospf database router
OSPF Router with ID (172.20.0.1) (Process ID 1)
Router Link States (Area 0)
Routing Bit Set on this LSA
LS age: 392
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 172.18.0.1
Advertising Router: 172.18.0.1
LS Seq Number: 80000003
Checksum: 0xCD54
Length: 48
AS Boundary Router
Number of Links: 2
Link connected to: another Router (point-to-point)
(Link ID) Neighboring Router ID: 172.19.0.1
(Link Data) Router Interface address: 172.18.0.1
Number of TOS metrics: 0
TOS 0 Metrics: 1562
Link connected to: a Stub Network
(Link ID) Network/subnet number: 172.18.0.0
(Link Data) Network Mask: 255.255.0.0
Number of TOS metrics: 0
TOS 0 Metrics: 1562
LS age: 103
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 172.19.0.1
Advertising Router: 172.19.0.1
LS Seq Number: 80000004
Checksum: 0xE9A5
Length: 60
Number of Links: 3
Link connected to: a Transit Network
(Link ID) Designated Router address: 172.19.0.1
(Link Data) Router Interface address: 172.19.0.1
Number of TOS metrics: 0
TOS 0 Metrics: 1
Link connected to: another Router (point-to-point)
(Link ID) Neighboring Router ID: 172.18.0.1
(Link Data) Router Interface address: 172.18.0.2
Number of TOS metrics: 0
TOS 0 Metrics: 1562
Link connected to: a Stub Network
(Link ID) Network/subnet number: 172.18.0.0
(Link Data) Network Mask: 255.255.0.0
Number of TOS metrics: 0
TOS 0 Metrics: 1562
LS age: 102
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 172.20.0.1
Advertising Router: 172.20.0.1
LS Seq Number: 80000004
Checksum: 0x479
Length: 60
Number of Links: 3
Link connected to: another Router (point-to-point)
(Link ID) Neighboring Router ID: 172.21.0.1
(Link Data) Router Interface address: 172.20.0.1
Number of TOS metrics: 0
TOS 0 Metrics: 1562
Link connected to: a Stub Network
(Link ID) Network/subnet number: 172.20.0.0
(Link Data) Network Mask: 255.255.0.0
Number of TOS metrics: 0
TOS 0 Metrics: 1562
Link connected to: a Transit Network
(Link ID) Designated Router address: 172.19.0.1
(Link Data) Router Interface address: 172.19.0.2
Number of TOS metrics: 0
TOS 0 Metrics: 10
Routing Bit Set on this LSA
LS age: 113
Options: (No TOS-capability, No DC)
LS Type: Router Links
Link State ID: 172.21.0.1
Advertising Router: 172.21.0.1
LS Seq Number: 80000005
Checksum: 0xC272
Length: 48
Area Border Router
Number of Links: 2
Link connected to: another Router (point-to-point)
(Link ID) Neighboring Router ID: 172.20.0.1
(Link Data) Router Interface address: 172.20.0.2
Number of TOS metrics: 0
TOS 0 Metrics: 1562
Link connected to: a Stub Network
(Link ID) Network/subnet number: 172.20.0.0
(Link Data) Network Mask: 255.255.0.0
Number of TOS metrics: 0
TOS 0 Metrics: 1562