D-Link DGS-6600-48T Product Manual - Page 52

DGS-6604 m Example area nssa An NSSA allows external routes to be advertised to the area in type 7 link state advertisement (LSA). These routes are then leaked into other areas. Although, the external routes from other areas still do not enter the NSSA. Use the area nssa command to simplify the administration of connecting a central site using OSPF to a remote site that is using a different routing protocol. Use this command to extend OSPF to cover the remote connection by defining the area between the central router and the remote router as an NSSA. For ASBR NSSA re-distribution, external routes will only be redistributed to the NSSA when redistribution is configured for the associated OSPF process. The external routes from other areas within the same AS will not be injected to the NSSA. For an ASBR, a Type 7 default route will be generated into the NSSA when it exists in the redistributed routes. For an ABR, when this option is specified, the type-7 default route will always be generated into the NSSA. If there are multiple default routes generated into the NSSA, the following priority will be followed: Type 3 priority > Type 7 priority. This command show how to set the nssa area: Switch# configure terminal Switch(config)# router ospf Switch(config-router)# area 1 nssa Verify the settings by entering the show ip ospf command. CLI Reference Guide 42