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In addition to the show commands discussed
in Module 4, several key OSPF commands can be used to verify multiarea
operation.
- show ip ospf border-routers
– Displays the
internal OSPF routing table entries to an ABR.
- show ip ospf virtual-links
–
Displays parameters about the current state of OSPF virtual links.
- show ip ospf process-id
– Displays information
about each area to which the router is connected, and indicates
whether the router is an ABR, ASBR, or both. The process ID is a
user defined identification parameter. It is locally assigned and
can be any positive integer number. The number used here is the
number assigned administratively when enabling the OSPF routing
process.
- show ip ospf database
–
Displays the contents of the topological database maintained by the
router. Several keywords can be used with this command to get
specific information about the following links:
- show ip ospf [process-id
area-id] database [router]
–
Displays individual router link-state information.
- show ip ospf [process-id
area-id] database [network]
–
Displays network link-state information. The area ID is the area
number associated with the OSPF address range defined in the
network router configuration command when defining a particular
area.
- show ip ospf [process-id
area-id] database [summary]
–
Displays summary information about ABR link states.
- show ip ospf [process-id
area-id] database [asbr-summary]
–
Displays information about ASBR link-states.
- show ip ospf [process-id
area-id] database [external]
–
Displays information about autonomous system external link states.
- show ip ospf [process-id
area-id] database [database-summary]
–
Displays database summary information and totals.
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Lab Activity
e-Lab Activity: Verifying Multiarea ODPF Operation
The purpose of this lab is to use a few show commands
to verify multiarea OSPF operation.
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