Item
Description
• E or No E is displayed on whether the originating router
can accept AS External LSAs.
LS Type
Displays the LSA type.
Link State ID
Displays the Link State ID.
Advertising Router Identifies the router ID of the LSA’s originating router.
LS Seq Number
Displays the link state sequence number. This number
allows you to identify old or duplicate LSAs.
Checksum
Displays the Fletcher checksum of an LSA’s complete
contents.
Length
Displays the length in bytes of the LSA.
Network Mask
Displays the network mask implemented on the area.
TOS
Displays the TOS options. Option 0 is the only option.
Metric
Displays the LSA metrics.
Example
#show ip ospf 100 database summary
OSPF Router with ID (1.1.1.10) (Process ID 100)
Summary Network (Area 0.0.0.0)
LS age: 1551
Options: (No TOS-capability, DC, E)
LS type: Summary Network
Link State ID: 192.68.16.0
Advertising Router: 192.168.17.1
LS Seq Number: 0x80000054
Checksum: 0xb5a2
Length: 28
Network Mask: /24
TOS: 0 Metric: 1
LS age: 9
Options: (No TOS-capability, No DC, E)
LS type: Summary Network
Link State ID: 192.68.32.0
Advertising Router: 1.1.1.10
LS Seq Number: 0x80000016
Checksum: 0x987c
Length: 28
Network Mask: /24
TOS: 0 Metric: 1
LS age: 7
Options: (No TOS-capability, No DC, E)
LS type: Summary Network
Link State ID: 192.68.33.0
Advertising Router: 1.1.1.10
LS Seq Number: 0x80000016
Checksum: 0x1241
Length: 28
Network Mask: /26
TOS: 0 Metric: 1
Open Shortest Path First (OSPFv2 and OSPFv3)
969
