Configuring Other Ospf Parameters - Cisco WS-C3750-48PS-S Software Configuration Manual

Configuring OSPF
Command
Step 3 area area-id authentication
Step 4 area area-id authentication message-digest (Optional) Enable MD5 authentication on the area.
Step 5
area area-id stub [no-summary]
Step 6
area area-id nssa [no-redistribution]
[default-information-originate]
[no-summary]
Step 7 area area-id range address mask
Step 8 end
Step 9
show ip ospf [process-id]
show ip ospf [process-id [area-id]] database
Step 10 copy running-config startup-config
Use the no form of these commands to remove the configured parameter value or to return to the
default value.

Configuring Other OSPF Parameters

You can optionally configure other OSPF parameters in router configuration mode.
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Catalyst 3750 Switch Software Configuration Guide
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Route summarization: When redistributing routes from other protocols as described in the
Route Maps to Redistribute Routing Information" section on page
individually in an external LSA. To help decrease the size of the OSPF link state database, you can
use the summary-address router configuration command to advertise a single router for all the
redistributed routes included in a specified network address and mask.
Virtual links: In OSPF, all areas must be connected to a backbone area. You can establish a virtual
link in case of a backbone-continuity break by configuring two Area Border Routers as endpoints of
a virtual link. Configuration information includes the identity of the other virtual endpoint (the other
ABR) and the nonbackbone link that the two routers have in common (the transit area). Virtual links
cannot be configured through a stub area.
Purpose
(Optional) Allow password-based protection against unauthorized
access to the identified area. The identifier can be either a decimal
value or an IP address.
(Optional) Define an area as a stub area. The no-summary keyword
prevents an ABR from sending summary link advertisements into the
stub area.
(Optional) Defines an area as a not-so-stubby-area. Every router
within the same area must agree that the area is NSSA. Select one of
these keywords:
no-redistribution—Select when the router is an NSSA ABR and
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you want the redistribute command to import routes into normal
areas, but not into the NSSA.
default-information-originate—Select on an ABR to allow
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importing type 7 LSAs into the NSSA.
no-redistribution—Select to not send summary LSAs into the
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NSSA.
(Optional) Specify an address range for which a single route is
advertised. Use this command only with area border routers.
Return to privileged EXEC mode.
Display information about the OSPF routing process in general or for
a specific process ID to verify configuration.
Display lists of information related to the OSPF database for a
specific router.
(Optional) Save your entries in the configuration file.
Chapter 34 Configuring IP Unicast Routing
34-64, each route is advertised
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