An NSSA is a new type of OSPF area. Neither the NSSA nor the stub area transmits routes learned from other areas in the AS on which it resides. Different from the stub area, the NSSA allows AS external routes to be imported and forwarded in the entire AS. Configuring OSPF Stub Areas ...
If both interface authentication and area authentication are configured, the authentication succeeds as long as the interface authentication succeeds. If authentication is configured on an interface, OSPFv3 neighbor relationships can be established on the interface as long as interface authentication succeeds...
no area area-id translation-role Syntax Description area-id - Area associated with the OSPF address range. It is specified as an IP address. translation-role - An NSSA Border router’s ability to perform NSSA Translation of Type-7 LSAs to Type-5 LSAs. Mode Router Configuration ...
6. The Area Data StructureTransitCapability This parameter indicates whether the area can carry data traffic that neither originates nor terminates in the area itself.This parameter is calculated when the area's shortest-path tree is built (see Section 16.1, where TransitCapability is set to TRUE...
1 normal 0 stub 0 nssaNumber of areas transit capable is 0External flood list length 0IETF NSF helper support enabledCisco NSF helper support enabledReference bandwidth unit is 100 mbpsArea BACKBONE(0)Number of interfaces in this area is 3 (1 loopback)Area has message digest authenticationSPF ...
SEFOS(config-router)# area 1.1.1.1 stub no-summary Notes In stub area, the generation of summary LSA is optional. If no-summary option is specified in the command, then the router neither originates nor propagates summary LSAs into the stubby area or NSSA. It relies entirely on its...
6. The Area Data StructureTransitCapability This parameter indicates whether the area can carry data traffic that neither originates nor terminates in the area itself.This parameter is calculated when the area's shortest-path tree is built (see Section 16.1, where TransitCapability is se...
is that by default NSSA doesn’t have default route injected by ABR, though you can explicitly configure it. Then it will be distributed via LSA7 (NSSA external), whereas in other types of area default route is distributed via LSA3. In our topology we’ll use the following area type...
For that reason, if an OSPF router that is incapable of DoNotAge processing exists in any "regular" area (i.e., an area that is not a stub nor an NSSA), no AS-external-LSA can have DoNotAge set. This memo simplifies that requirement by broadening it to the following rule: LSAs ...
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