Why Are Intra-area Summary Routes Not Allowed?

1.	Why Are Intra-area Summary Routes Not Allowed?
Answer» OSPF DATABASES on routers in the same area must be identical. If route summarization was allowed WITHIN an area, some routers would have SPECIFIC routes and some routers would have SUMMARY routes for routers in the area. If this were allowed, the databases for the area would never AGREE. OSPF databases on routers in the same area must be identical. If route summarization was allowed within an area, some routers would have specific routes and some routers would have summary routes for routers in the area. If this were allowed, the databases for the area would never agree.

Answer»

OSPF DATABASES on routers in the same area must be identical. If route summarization was allowed WITHIN an area, some routers would have SPECIFIC routes and some routers would have SUMMARY routes for routers in the area. If this were allowed, the databases for the area would never AGREE.

OSPF databases on routers in the same area must be identical. If route summarization was allowed within an area, some routers would have specific routes and some routers would have summary routes for routers in the area. If this were allowed, the databases for the area would never agree.

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Why Are Intra-area Summary Routes Not Allowed?