Configure an NSSA Translation Role

You can configure the translation role for an NSSA to ensure that Type-7 LSAs are always translated into Type-5 LSAs. Alternatively, the default setting simply identifies an NSSA border router as a candidate that can participate in the translator election process.

This example configures area 0.0.0.6 as an NSSA in SEFOS1 (router ID 10.0.0.1) and specifies that the border router will always be able to translate Type-7 LSAs into Type-5 LSAs.

1. Enter Global Configuration mode in SEFOS1.

   SEFOS# configure terminal
   

2. Enable OSPF globally in SEFOS1.

   SEFOS(config)# ipv6 router ospf
   

3. Configure the OSPF router ID.

   SEFOS(config-router)# router-id 10.0.0.1
   

4. Configure the ASBR router status.

   SEFOS(config-router)# asbr router
   

5. Configure an area as an NSSA.

   SEFOS(config-router)# area 0.0.0.6 nssa
   

6. Configure the translator role.

   SEFOS(config-router)# area 0.0.0.6 translation-role always
   

7. Ensure that the translation role is correct.

   SEFOS# show ipv6 ospf areas
    
   OSPFV3  AREA  CONFIGURATION  INFORMATION
    
   AreaId: 0.0.0.0                 Area Type: NORMAL AREA
   Spf Calculation: 13 (times)     Area Bdr Rtr Count: 0
   As Bdr Rtr Count: 0             Area Summary: Send Summary
    
   AreaId: 0.0.0.6                 Area Type: NSS AREA
   Spf Calculation: 13 (times)     Area Bdr Rtr Count: 0
   As Bdr Rtr Count: 0             Area Summary: Send Summary
   Stub Metric: 0x1                Stub Metric Type: 2
   Translator Role: Always         Translator State: Elected/Enabled
   Nssa Stability Interval: 40