Use this command to configure an area as a Not-So-Stubby-Area (NSSA).
| area-id | ip-address | Specifies the NSSA area. Valid values are decimal values or IP addresses. |
| no-summary | (Optional) Prevents an Area Border Router (ABR) from sending type 3 summary Link State Advertisements (LSAs) into the NSSA area. When this parameter is used, it means that all destinations outside of the NSSA area are represented by means of a default route. |
| transstabilityint seconds | (Optional) Specifies the translator stability interval in seconds. Valid values: 0 - 65535 |
| transrole always | (Optional) Specifies that an NSSA router will unconditionally translate Type-7 LSAs to Type-5 LSAs when acting as an NSSA border router. Configuring the identity of the translator can be used to bias the routing to aggregated destinations. When translator role is set to Always, Type-7 LSAs are always translated regardless of the translator state of other NSSA border routers. |
If no-summary, transstabilityint and transrole always are not specified, a default NSSA area is configured.
OSPF router configuration.
An NSSA area allows some external routes represented by external Link State Advertisements (LSAs) to be imported into it. This is in contrast to a stub area that does not allow any external routes.
The “no” form of this command changes the NSSA back to a default area.
This example shows how to configure area 10 as an NSSA area:
System(rw-config)->router ospf 1 System(rw-config-ospf-1)->area 10 nssa
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