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| Sun Ethernet Fabric Operating System ### OSPFv3 Administration Guide

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## Configure Default Summary Route for an NSSA

Configuring a NSSA with the `no-summary` option specifies that the router will neither originate nor propagate summary LSAs into the NSSA, and will, instead, depend entirely on its default route. You can specify the `no-summary` option only in ABRs.

This example configures area `0.0.0.6` as an NSSA in SEFOS1 (router ID `10.0.0.1`), with no summary LSAs being originated or propagated by the router to the NSSA.

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 area `0.0.0.6` as a stub area.

       SEFOS(config-router)# area 0.0.0.6 nssa no-summary
       SEFOS(config-router)# end

5. Ensure that the default summary route is set.

       SEFOS# show ipv6 ospf areas

       OSPFV3  AREA  CONFIGURATION  INFORMATION

       AreaId: 0.0.0.0                 Area Type: NORMAL AREA
       Spf Calculation: 10 (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: 14 (times)     Area Bdr Rtr Count: 0
       As Bdr Rtr Count: 0             Area Summary: No Summary
       Stub Metric: 0x1                Stub Metric Type: 2
       Translator Role: Candidate      Translator State: Elected/Enabled
       Nssa Stability Interval: 40

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