D-Link DGS-6600-48T Product Manual - Page 51
area nssa
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DGS-6604 m area nssa area nssa Use this command to define an area as an NSSA (not-so-stubby) area. Use the no nssa command to remove the NSSA designation. Note: For OSPFv3 this command is not supported. area AREA-ID nssa [no-redistribution] [default-information-originate [metric METRIC-VALUE] [metric-type TYPE-VALUE ] ] [no-summary] no area AREA-ID nssa [no-redistribution] [default-information-originate] [no-summary] Syntax Description AREA-ID Specifies the identifier of the area distinguished as the NSSA. The identifier can be specified as either a decimal value or an IP address. no-redistribution (Optional) Type 7 external routes will not be re-distributed to the NSSA. When the user specifies to redistribute routes to the OSPF process, external routes will always be redistributed to the normal area. This function only takes effect when the router is an autonomus sytem boundry router (ASBR). default-information- (Optional) For ASBR, a Type 7 default route will be generated into the NSSA originate area when it exists in the redistributed routes. For ABR, when this option is specified, the type-7 default route will always be generated into the NSSA area. metric METRICVALUE (Optional) Specifies the metric for the default route. If not specified, the value will be 1. The range for METRIC-VALUE is 0-16777214. metric-type TYPEVALUE (Optional) For OSPF, the external link type associated with the default route advertised into the OSPF routing domain. It can be one of two values: Type 1 external route or Type 2 external route. If a metric-type is not specified, the switch adopts a Type 2 external route. no-summary (Optional) This function only take effect when the router is an ABR. Summary routes are not advertised into the NSSA. Default Command Mode Usage Guideline • No NSSA area is configured. • External routes will be redistributed to the NSSA area in type 7 unless no-redistribute is specified. • Type 7 default route will only be advertised by default when default- information-originate is specified. • If no-summary is specified, the summary route will not be advertised to the NSSA area. Router configuration There are no external routes in an OSPF stub area, so it is not possible to redistribute from another protocol into a stub area. CLI Reference Guide 41