OSPF Configuration
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581
Alcatel-Lucent
Beta Beta
OmniAccess 5740 Unified Services Gateway CLI Configuration Guide
TO CONFIGURE OSPF NSSA
NSSA does not flood type 5 external LSAs from the core into the area, but can
import autonomous system external routes in a limited fashion within the area.
NSSA allows importing of type 7 autonomous system external routes within NSSA
area by redistribution. These type 7 LSAs are translated into type 5 LSAs by
NSSA ABRs, which are flooded throughout the whole routing domain.
Summarization and filtering are supported during the translation.
To specify area parameters to configure OSPF NSSA, enter the following
command:
You can set a type 7 default route that can be used to reach external destinations.
When configured, the router generates a type 7 default route into the NSSA.
Every router within the same area must agree that the area is NSSA; otherwise, the
routers will not form adjacency.
E
XAMPLE
ALU(config-router ospf 1)# area 1 nssa
Command (in RCM) Description
area {<0-4294967295>|<ip-address>}
nssa [default-information-
originate] [no-summary] [no-
redistribution]
Defines an area to be NSSA.
The LSAs are configured by
placing the keyword "no
summary". This step is
necessary only at the ABR.
no area {<0-4294967295>|<ip-
address>} nssa [default-
information-originate] [no-summary]
[no-redistribution]
The ‘no’ command sets area to
default.
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