Vyatta NOS documentation

Learn how to install, configure, and operate Vyatta Network Operating System (Vyatta NOS), which helps to drive our virtual networking and physical platforms portfolio.

protocols ospf area <area-id> area-type nssa <action>

Designates an OSPF area as an NSSA.

set protocols ospf[ process pid ] area area-id area-type nssa { default-cost cost | [ default-information-originate [ metric 0-16777214 | metric-type { 1 | 2 } ] | no-summary | translate { always | candidate } }
delete protocols ospf [ process pid ] area area-id area-type nssa [ default-cost cost | default-information-originate [ metric 0-16777214 | metric-type { 1 | 2 } ] | no-summary | translate { always | candidate } ]
show protocols ospf [ process pid ] area area-id area-type nssa

By default, summary routes are generated into the area, and only Type 7 LSAs from the candidate NSSA ABR are translated.

process pid
Specifies the PID of an IPv4 OSPF process.
area-id
The ID of the OSPF area being configured, expressed as an IP address or a decimal value.
default-cost cost
Sets the administrative cost, or metric, that applies to the default route in the specified OSPF area. The cost ranges from 0 through 6777215.
default-information-originate
Distributes the default route into an NSSA area.

metric: The OSPF default metric.

metric-type: Specifies the OSPF metric type on how cost is calculated for default routes. The metric type is either of the following:

1: Adds internal cost to external cost.

2: Uses only external cost.

The default type is 2.

no-summary
Prevents route summaries from being generated into the area.
translate
Directs the NSSA ABR when to translate Type 7 LSAs into Type 5 AS-External-LSAs. The direction is either of the following:

always: Always translates Type 7 LSAs into Type 5 AS-External-LSAs.

candidate: Translates only Type 7 LSAs from the candidate NSSA ABR.

Configuration mode

protocols {
       ospf {
               process pid {
                      area area-id {
                              area-type {
                                      nssa {
                                             default-cost cost
                                             default-information-originate
                                             metric 0-16777214
                                             metric-type 1-2
                                             no-summary
                                             translate {
                                                    always
                                                    candidate
                                             }
                                      }

                              }
                      }
               }
       }
}

Use this command to designate an OSPF area as a not-so-stubby area.

Type 5 AS-External-LSAs are not allowed in stubby areas, but Type 7 LSAs may be translated into Type 5 LSAs by the not-so-stubby (NSSA) area border router and may traverse the NSSA in this manner. Interarea routes are not allowed.

Use the set form of this command to set the OSPF area type to not-so-stubby.

Use the delete form of this command to designate an OSPF are.

Use the show form of this command to display an area type configuration.