Setup Guide

Field Description
Checksum Identifies the link state sequence number. This number enables you to identify old
or duplicate LSAs.
Length Displays the Fletcher checksum of an LSA’s complete contents.
Network Mask Displays the length in bytes of the LSA.
Attached Router Identifies the IP address of routers attached to the network.
Example
DellEMC# show ip ospf 1 data network
OSPF Router with ID (20.20.20.5) (Process ID 1)
Network (Area 0.0.0.0)
LS age: 1372
Options: (No TOS-capability, DC, E)
LS type: Network
Link State ID: 202.10.10.2
Advertising Router: 20.20.20.8
LS Seq Number: 0x80000006
Checksum: 0xa35
Length: 36
Network Mask: /24
Attached Router: 20.20.20.8
Attached Router: 20.20.20.9
Attached Router: 20.20.20.7
Network (Area 0.0.0.1)
LS age: 252
Options: (TOS-capability, No DC, E)
LS type: Network
Link State ID: 192.10.10.2
Advertising Router: 192.10.10.2
LS Seq Number: 0x80000007
Checksum: 0x4309
Length: 36
Network Mask: /24
Attached Router: 192.10.10.2
Attached Router: 20.20.20.1
Attached Router: 20.20.20.5
DellEMC#
Related
Commands
● show ip ospf database — display OSPF database information.
show ip ospf database nssa-external
Display NSSA-External (type 7) LSA information.
Syntax
show ip ospf [process-id | vrf vrf-name ] database nssa-external [link-
state-id] [adv-router ip-address]
Parameters
process-id Enter the OSPF Process ID to show a specific process. If no Process ID is entered,
command applies only to the first OSPF process.
vrf vrf-name Enter the keyword vrf followeed by the name of the VRF to view NSSA-External
LSA information corresponding to the OSPF process that is tied to a specific VRF.
link-state-id (OPTIONAL) Specify LSA ID in dotted decimal format. The LSA ID value depends
on the LSA type, and it can be one of the following:
● the network’s IP address for Type 3 LSAs or Type 5 LSAs
Open Shortest Path First (OSPFv2 and OSPFv3) 1009