Item Description
LS Age Displays the LSA age.
Options Displays the optional capabilities available on router. The
following options can be found in this item:
• TOS-capability or No TOS-capability is displayed
depending on whether the router can support Type of
Service.
• DC or No DC is displayed depending on whether the
originating router can support OSPF over demand
circuits.
• 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 Dell#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
1126 Open Shortest Path First (OSPFv2 and OSPFv3)