D-Link DGS-6600-48TS Configuration Guide - Page 227
Redistributing Routes to OSPF, Generating a Default Route to an NSSA Area
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Volume 4-Layer 3 Configurations / Chapter 23-Open Shortest Path First (OSPF) OSPF Configuration Commands In the following example, the user assigns a default cost of 20 to stub network 10.0.0.0: dgs-6600:2>enable dgs-6600:15#configure terminal dgs-6600:15(config)#router ospf dgs-6600:15(config-router)#area 10.0.0.0 default-cost 20 dgs-6600:15(config-router)#end Generating a Default Route to an NSSA Area For an ABR of an NSSA area, Type 3 default routes will be automatically injected into an NSSA area. The user can manually specify that Type 7 default routes will be injected into the NSSA area. For an ASBR, when the default-information-originate option is specified, Type 7 default routes will be generated into the NSSA area when it exists in the redistributed routes. If no-redistribution is specified, a default route will not be generated. For an ABR, when the default-information-originate option is specified, the Type-7 default route will always be generated into the NSSA area. If there are multiple default routes generated into the NSSA area, the following priority will be followed: intra-route > inter-route > external route. Use the following command in OSPF router configuration mode to specify the area parameters that are needed to configure an OSPF NSSA area: Command area AREA-ID nssa [default-informationoriginate [metric METRIC-VALUE][metrictype TYPE-VALUE]] Explanation Defines the area that will be an NSSA. In the following example, the user sets area 1 to be an NSSA: dgs-6600:2>enable dgs-6600:15#configure terminal dgs-6600:15(config)#router ospf dgs-6600:15(config-router)#area 1 nssa dgs-6600:15(config-router)#end Redistributing Routes to OSPF Included in this Topic are: • Redistributing Routes to Normal Areas and NSSA Areas • Route Summarization Across OSPF Areas Redistributing Routes to Normal Areas and NSSA Areas External routes can be redistributed to normal areas as Type 5 external routes and redistributed to NSSA areas as Type 7 external routes by an ASBR. DGS-6600 Configuration Guide 227