Cisco ONS 15454 SDH Configuration Manual page 179

Chapter 11 Configuring Networking Protocols
Route summarization is the consolidation of advertised addresses into a single summary route to be
advertised by other areas. If network numbers are contiguous, you can use the area range router
configuration command to configure the ABR to advertise a summary route that covers all networks in
the range.
The OSPF area router configuration commands are all optional.
Note
Beginning in privileged EXEC mode, follow these steps to configure area parameters:
Command
Step 1
Router# configure terminal
Step 2
Router(config)# router ospf
process-id
Step 3
Router(config)# area area-id
authentication
Step 4
Router(config)# area area-id
authentication message-digest
Step 5
Router(config)# area area-id stub
[no-summary]
Step 6
Router(config)# area area-id nssa
{no-redistribution |
default-information-originate |
no-summary}
Step 7
Router(config)# area area-id range
address-mask
Step 8
Router(config)# end
Step 9
Router# show ip ospf [ process-id ]
Step 10
Router# 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.
privileged EXEC commands.
Example 11-7 shows the output of the show ip ospf database and the show ip ospf
Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
Purpose
Enters global configuration mode.
Enables OSPF routing, and enters router configuration
mode.
(Optional) Allows password-based protection against
unauthorized access to the identified area. The identifier
can be either a decimal value or an IP address.
(Optional) Enables MD5 authentication on the area.
(Optional) Defines 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 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 importing type 7 LSAs into the NSSA.
no-redistribution—Select to not send summary LSAs
•
into the NSSA.
(Optional) Specifies an address range for which a single
route is advertised. Use this command only with area
border routers.
Returns to privileged EXEC mode.
Displays information about the OSPF routing process in
general or for a specific process ID to verify configuration.
(Optional) Saves your entries in the configuration file.
Configuring OSPF
11-15