Connectivity Guide

● LS Type — Displays the LS type.
● Link State ID — Identifies the router ID.
● Advertising Router — Identifies the advertising router’s ID.
● LS Seq Number — Identifies the LS sequence number. This identifies old or duplicate LSAs.
● Checksum — Displays the Fletcher checksum of an LSA’s complete contents.
● Length — Displays the LSA length in bytes.
● Network Mask—Identifies the network mask implemented on the area.
● TOS—Displays the ToS options. The only option available is zero.
● Metric—Displays the LSA metric.
Example
OS10# show ip ospf database nssa external
OSPF Router with ID (2.2.2.2) (Process ID 100)
NSSA External (Area 0.0.0.1)
LS age: 98
Options: (No TOS-Capability, No DC, No Type 7/5 translation)
LS type: NSSA External
Link State ID: 0.0.0.0
Advertising Router: 1.1.1.1
LS Seq Number: 0x80000001
Checksum: 0x430C
Length: 36
Network Mask: /0
Metric Type: 1
TOS: 0
Metric: 16777215
Forward Address: 0.0.0.0
External Route Tag: 0
LS age: 70
Options: (No TOS-Capability, No DC, No Type 7/5 translation)
LS type: NSSA External
Link State ID: 0.0.0.0
Advertising Router: 2.2.2.2
LS Seq Number: 0x80000001
Checksum: 0x2526
Length: 36
Network Mask: /0
Metric Type: 1
TOS: 0
Metric: 0
Forward Address: 0.0.0.0
External Route Tag: 0
LS age: 65
Options: (No TOS-Capability, No DC, No Type 7/5 translation)
LS type: NSSA External
Link State ID: 12.1.1.0
Advertising Router: 2.2.2.2
LS Seq Number: 0x80000001
Checksum: 0xBDEA
Length: 36
Network Mask: /24
Metric Type: 2
TOS: 0
Metric: 20
Forward Address: 0.0.0.0
External Route Tag: 0
LS age: 65
Options: (No TOS-Capability, No DC, No Type 7/5 translation)
LS type: NSSA External
Link State ID: 13.1.1.0
Advertising Router: 2.2.2.2
LS Seq Number: 0x80000001
Checksum: 0xB0F6
532
Layer 3